Power Supply 2620A, 2625A Users Manual

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2620A/2625A

Hydra Series II Data Acquisition Unit

Hydra Series II Data Logger

Users Manual

PN 686675

November 1997

All product names are trademarks of their respective companies.

Summary of content (197 pages)

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® 2620A/2625A Hydra Series II Data Acquisition Unit Hydra Series II Data Logger Users Manual PN 686675 November 1997 © 1997 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.
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LIMITED WARRANTY & LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs and services are warranted for 90 days.
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Table of Contents Chapter 1 Title Introduction........................................................................................ 1-1 The Hydra Series II Data Acquisition Unit ....................................................... The Hydra Series II Data Logger ...................................................................... Options and Accessories ................................................................................... Applications Software........................................
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2620A/2625A Users Manual Using the Scan Function.................................................................................... Reviewing Channel Data................................................................................... Viewing the Totalizer Count ............................................................................. Using External DC Power ................................................................................. Using the Rack Mount Kit....................................
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Contents (continued) Autoprint: Computer Interface Control .................................................... Autoprint: Output Format ......................................................................... Memory Storage: Computer Interface Control......................................... Memory Retrieval ..................................................................................... Memory Full Operation ............................................................................
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2620A/2625A Users Manual Isolated and Shielded Sensor Configuration ............................................ 5-11 In More Detail ............................................................................................... 5-12 6 Maintenance ....................................................................................... 6-1 Introduction ....................................................................................................... Cleaning.............................................
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List of Tables Table 1-1. 1-2. 2-1. 2-2. 2-3. 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 3-11. 3-12. 3-13. 3-14. 3-15. 3-16. 3-17. 3-18. 3-19. 4-1. 4-2. 4-3. 4-4. 4-5. 4-6. 4-7. 4-8. 5-1. 6-1. 6-2. Title Hydra Features....................................................................................................... Accessories ............................................................................................................ Display Annunciators ......................................
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2620A/2625A Users Manual 6-3. 6-4. 6-5. 6-6. 6-7. E-1. Performance Tests (Voltage, Resistance, and Frequency) .................................... 6-8 Performance Tests for Thermocouple Temperature Function (IPTS-68/ITS-90) . 6-13 Performance Tests for RTD Temperature Function (Resistance) (DIN/IEC 751 Amendment 1) (IPTS-68) ...................................................................................... 6-14 Performance Tests for RTD Temperature Function (DIN/IEC 751 Amendment 1) (IPTS-68) ........
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List of Figures Figure 2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 3-1. 3-2. 3-3. 3-4. 4-1. 4-2. 4-3. 4-4. 5-1. 5-2. 5-3. 6-1. 6-2. 6-3. 6-4. 6-5. E-1. E-2. E-3. F-1. F-2. F-3. F-4. F-5. F-6. Title Adjusting Handle ................................................................................................... Front Panel............................................................................................................. Left Display ...........................................................................
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Caution THIS IS AN IEC SAFETY CLASS 1 PRODUCT. BEFORE USING, THE GROUND WIRE IN THE LINE CORD OR THE REAR PANEL BINDING POST MUST BE CONNECTED FOR SAFETY. Interference Information This equipment generates and uses radio frequency energy and if not installed and used in strict accordance with the manufacturer’s instructions, may cause interference to radio and television reception.
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Safety Terms in this Manual This instrument has been designed and tested in accordance with IEC publication 1010, Safety Requirements for Electrical Measuring, control and Laboratory Equipment. This Users Manual contains information, warnings, and cautions that must be followed to ensure safe operation and to maintain the instrument in a safe condition. Use of this equipment in a manner not specified herein may impair the protection provided by the equipment.
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2620A/2625A Users Manual AC Power Source The instrument is intended to operate from an ac power source that will not apply more than 264V ac rms between the supply conductors or between either supply conductor and ground. A protective ground connection by way of the grounding conductor in the power cord is required for safe operation.
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Getting Started Introduction This section will have you operating Hydra in a matter of minutes. All basic operating information is covered in this short Getting Started guide. Subsequent chapters of the manual cover the instrument in more detail. Note This manual contains information and warnings that must be followed to ensure safe operation and retain the instrument in safe condition.
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2620A/2625A Users Manual this example, "OFF" is lit if you’re working with channel 0, and have already performed the Configuration Reset). 3. Press G, D to cycle through the choices for measurement function. For now, select "V AC", to set up the channel for AC voltage measurements. 4. Press E to confirm your choice. The instrument then offers a choice of measurement ranges for this function, starting with "Auto" for autoranging. 5. Press G, D to cycle through the choices for range. Select the 300v range.
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Getting Started (continued) select the mode (“Mode” in right display) from “All” to output all scan data, “ALAr” to output only alarm data, or “trAnS” to output data scanned only when the Hydra goes into or out of alarm. Once the destination and mode have been set, enable Memory Storage by pressing: print. The “PRN” annunciator lights to indicate that Memory Storage is enabled. Warning No data will be saved unless the “PRN” annunciator is lit on the on the Hydra from panel florescent display.
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2620A/2625A Users Manual Note You cannot activate the Monitor function if the selected channel is set up as OFF; the instrument gives a long beep and ignores your request. The "MON" annunciator comes on, and the instrument starts taking measurements on the selected channel. If you haven’t connected the input leads to a signal, the instrument simply displays a nominal noise reading; on channels set up to measure resistance, "OL" is displayed for overload.
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Getting Started (continued) 20 . . . . . . . 0 LAST MIN MAX LAST MIN MAX oo24f.eps Press N or C to remove the Review data from the display when you’re through. The remainder of this manual covers all aspects of using Hydra. Glance over the Table of Contents; you’ll find that each section presents an additional layer of information. You can use as little as (or as much as) you need for your Hydra application.
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2620A/2625A Users Manual xvi
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Chapter 1 Introduction Title The Hydra Series II Data Acquisition Unit ....................................................... The Hydra Series II Data Logger ...................................................................... Options and Accessories ................................................................................... Applications Software ....................................................................................... IEEE-488 Interface Assembly ..................................
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2620A, 2625A Users Manual 1-2
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Introduction The Hydra Series II Data Acquisition Unit 1 Note This manual contains information and warnings that must be followed to ensure safe operation and retain the instrument in safe condition. The Hydra Series II Data Acquisition Unit The Hydra Series II Data Acquisition Unit (Model 2620A) is a multi-channel data acquisition unit able to measure ac and dc voltages, temperature via thermocouples and RTDs, resistance, and frequency.
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2620A, 2625A Users Manual Table 1-1. Hydra Features • Channel Scanning Can be continuous scanning, scanning at an interval time, single scans, or triggered (internal or external) scans. • Channel Monitoring Make measurements on a single channel and view these measurements on the display. • Channel Scanning and Monitoring View measurements made for the monitor channel while scanning of all active channels continues.
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Introduction Where to go From Here 1 Accessories Accessories available for the instrument are described in Table 1-2. Table 1-2. Accessories Model Description 80I-410 80i-1010 Clamp-On DC/AC Current Probes. 80J-10 Current Shunt. 2620A-05K Field-installable IEEE-488 Option kit (Hydra Data Acquisition Unit only). 2620A-901 Hydra Data Logger Applications Package. C40 Soft carrying case. Provides padded protection for the instrument. Includes a pocket for the manual and pouch for the line cord.
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2620A, 2625A Users Manual Getting Started Provides a quick introduction to instrument setup and operation. Chapter 1 Introduction Describes standard features, options, and accessories for the Fluke Hydra Series II Data Acquisition Unit and Hydra Series II Data Logger. Also, this chapter discusses the organization and intended uses of this manual. Chapter 2 Overview Brings the instrument from its shipping container to operating status.
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Chapter 2 Overview Title Introduction ....................................................................................................... Setting Up the Instrument.................................................................................. Unpacking and Inspecting the Instrument..................................................... Adjusting the Handle .................................................................................... Line Power ..................................................
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20A, 2625A Users Manual 2-2
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Overview Introduction 2 Introduction Chapter 2 provides an overview of the major features of the instrument. Comprehensive details on all instrument features are found in Chapter 3 (for front panel operation) and Chapter 4 (for computer interface operation.
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2620A, 2625A Users Manual Line Power Warning To avoid shock hazard, connect the instrument power cord to a power receptacle with earth ground. Plug the line cord into the connector on the rear of the instrument. The instrument operates on any line voltage between 90 and 264V ac without adjustment, and at any frequency between 45 and 440 Hz. However, the instrument is warranted to meet published specifications only at 50/60 Hz.
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Overview Setting Up the Instrument 1 2 MAX MIN REVIEW LAST REM SCAN AUTO MON VΩ COM 2 FUNC 300V MAX SET FUNC Mx+B ALARM °C °F RO mV AC DC x1Mk Ω Hz ALRM RATE Mx+B CANCL ENTER F LIMIT HI OFF PRN CH 1 2 LO CAL EXT TR INTVL PRINT REVIEW CLOCK MODE CLEAR SHIFT LIST TOTAL LOCAL COMM ZERO CAL ENABLE SCAN SINGLE MON TRIGS POWER 8 7 1 INPUT TERMINALS (Channel 0) 2 DISPLAY (See Figures 2-3, 2-4, and 2-5) 3 ACTIVE MODE BUTTONS 5 6 7 4 OTHER BUTTONS These buttons are used to
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2620A, 2625A Users Manual REVIEW LAST MAX MIN REM SCAN AUTO MON SET FUNC Mx+B ALARM °C °F RO mV AC DC x1Mk Ω Hz F LIMIT HI OFF PRN CH 1 2 LO CAL EXT TR oo03f.eps Figure 2-3. Left Display REVIEW LAST MAX MIN REM SCAN AUTO MON SET FUNC Mx+B ALARM °C °F RO mV AC DC x1Mk Ω Hz F LIMIT HI OFF PRN CH 1 2 LO CAL EXT TR oo04f.eps Figure 2-4. Right Display REVIEW LAST MAX MIN REM SCAN AUTO MON SET FUNC Mx+B ALARM °C °F RO mV AC DC x1Mk Ω Hz F LIMIT HI OFF PRN CH 1 2 LO CAL EXT TR oo05f.
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Overview Setting Up the Instrument 2 Table 2-1. Display Annunciators MON Indicates that the Monitor function is enabled. SCAN Indicates that the Scan function is enabled. Scanning can be enabled as a single scan (SINGLE K Q), with a scan interval, with an alarm-triggered scan, or as an externally triggered scan. CH Indicates that the channel number is displayed immediately above, in the right display. SET Lit when the instrument is in Configuration Mode.
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2620A, 2625A Users Manual Table 2-1. Display Annunciators (cont) "1" Lit when alarm limit 1 is being defined. Also lit when displaying a measurement value (LAST, Monitor) which has exceeded alarm limit 1. "2" Lit when alarm limit 2 is being defined. Also lit when displaying a measurement value (LAST, Monitor) which has exceeded alarm limit 2. HI, LO Identifies alarm limit sensing (high or low) during channel configuration. At other times, identifies an alarm condition.
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Overview Operating Modes 2 Input Channels The instrument provides one input (channel 0) on the front panel and 20 inputs (channels 1 .. 20) through a connector on the rear panel. Channels 0, 1, and 11 can measure a maximum of 300V; all other channels can measure a maximum of 150V. Caution The maximum input that can be applied between any terminal of channels 2..10 and 12..20 is 150V dc or ac rms.
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2620A, 2625A Users Manual • Active Mode if this mode was in effect prior to the cycling of power. Scanning, monitoring, or combined scanning/monitoring is resumed. • Inactive Mode if the instrument was in Inactive Mode or Configuration Mode prior to cycling of power. When in Inactive Mode, the instrument shows configuration information for the displayed channel. The channel number appears in the right display, and other annunciators are dimly lit to show the present setup for this channel.
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Overview Front Panel Buttons 2 Front Panel Buttons Go ahead and press any front panel button. The instrument always provides an audible response to each button press. Valid entries yield a short beep; incorrect entries yield a longer beep. Don’t worry if you press an inappropriate button and get a long beep; you can’t damage the instrument. It will discard the button entry and wait for another entry. Selecting a Channel The channel number appears in the right display. Press G or D to select a channel.
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2620A, 2625A Users Manual Table 2-2. Front Panel Pushbuttons (cont) M Turns the Monitor function on or off. I Allows you to change the scan interval. Scanning becomes continuous when the interval is set to 0:00:00. U Enables/disables logging measurements to the printer (Autoprint - RS-232 only) or to internal data memory (Memory Storage). Only the Hydra Data Logger provides internal Memory Storage. N Calls up the Review array of MIN, MAX and LAST values to the display.
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Overview Setting up a Channel 2 1. Select a channel to set up: G D Look for the desired channel number in the right display. 2. Press the following buttons to change the setup: F SET and FUNC come on bright, along with the present setting for measurement function. G D Cycle through the choices for measurement function. E Accept your choice of measurement function. For resistance measurements, continue on with steps 3 and 4. For temperature measurements, skip to step 5. 3.
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2620A, 2625A Users Manual Note Any old alarm status/limits, Review array values, or scaling parameters are automatically cleared whenever you change a channel’s function. Setting Alarm Limits and Mx+B Scaling Values Alarm limits and Mx+B scaling values are set in a manner very similar to that used for the channel function. Begin by pressing either of the following buttons: A To begin alarm limits settings for this channel. B To begin scaling value settings for this channel.
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Overview Setting the Scan Interval 2 Mx+B Scaling The menu for setting Mx+B scaling values takes you through the following steps: • Set the M value (sign and number). • Set the decimal point location for the M value. • Set the multiplier for the M value (m, x1, k, M). • Set the B value (sign and number). • Set the decimal point location for the B value. • Set the multiplier for the B value (m, x1, k, M). Use G, D, H and J to cycle through the selections at each step.
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2620A, 2625A Users Manual Using the Monitor Function The Monitor function repeatedly measures the displayed channel. Press M to activate the Monitor function. Use G and D to change the monitored channel; undefined channels (those set to OFF) are automatically skipped over. Since the instrument cannot take measurements on a channel that has not been set up, it responds with a long beep if you try to activate the Monitor function on a channel that is defined as OFF.
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Overview Viewing the Totalizer Count 2 To clear out the contents of the Review array, press N to call the review data up to the display, and then select CLEAR (K N). The entire array is then cleared. All array values, including the displayed value, are changed to "-----". If a scan is occurring when a review clear is requested, new review values are taken from the next scan. If the Scan function is not active, "-----" continues to be shown for all values. Alarms are shown with the LAST review values.
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2620A, 2625A Users Manual Using the Rack Mount Kit Use the M00-200-634 Rack Mount Kit to mount the instrument in a standard 19-inch rack. First, rotate the two bottom feet on the instrument 180 degrees so that the support pads point up. Then install the instrument per the instructions provided with the Rack Mount Kit.
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Chapter 3 Operating the Instrument from the Front Panel Title Introduction ....................................................................................................... Operating Modes ............................................................................................... Other Displayed Data ........................................................................................ What is the Present Configuration?...................................................................
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2620A, 2625A Users Manual Front Panel Review Only Function............................................................... Front Panel Monitor Only Function.............................................................. Computer Interface-Initiated Lockouts ......................................................... REM Annunciator ............................................................................................. Calibration ...........................................................................
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Operating the Instrument from the Front Panel Introduction 3 Introduction Chapter 3 describes how to use the instrument features that were introduced in Chapter 2. The introductory information in Chapter 2 is designed to give you a feel for the instrument’s controls and display. The information presented here in Chapter 3 adds more detail about connecting and operating the instrument. Operating Modes The instrument has three modes of operation.
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2620A, 2625A Users Manual Other Displayed Data An array of "MIN", "MAX", and "LAST" values for each channel is updated whenever scan measurements are taken. This Review array can be displayed from Active or Inactive (but not Configuration) Mode by pressing N. The constantly updated Totalizer count can also be displayed (Active or Inactive Mode only) by pressing O. Note that either the Review array or the Totalizer count can be displayed at one time; you must deactivate one before activating the other.
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Operating the Instrument from the Front Panel Channel Configuration 3 Table 3-1. Configuration Reset Settings Perform a Configuration Reset to restore these conditions by pressing and holding POWER ON. C while cycling Channels 0 - 20: OFF. Measurement rate: Slow. Scaling (M): (B): 1 (all channels) 0 (all channels) Alarm parameters: Limit-1 and Limit-2 OFF. All limit values 0. Alarm assignments: Channels 0-3 assigned to outputs 0-3 respectively.
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2620A, 2625A Users Manual through both a known resistance and the sensed resistance. The resulting voltages are measured and appropriate conversions are applied to the measurement, yielding a displayed output in ohms. Frequency is measured by counting cycles for a known time period. The measurement represents the frequency observed during the sampling time. The instrument can measure a wide range of frequency inputs.
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Operating the Instrument from the Front Panel Channel Configuration 3 Table 3-3. Resistance Channel G PRESS THESE BUTTONS: TO SELECT FROM THESE CHOICES: D Range (Note 1) Function G F D E 20 G E D Auto 300.00 Ω 3.0000 kΩ 30.000 kΩ 300.00 kΩ 3.0000 MΩ 10.000 MΩ OFF V DC V AC Ω Hz °C or °F 0 1 . . G Terminals D 2T 4T E (Completes Selection and returns to Inactive Mode) Note 1. Determine the highest resistance value anticipated for this channel.
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2620A, 2625A Users Manual Table 3-5. Thermocouple Temperature Channel G D PRESS THESE BUTTONS: TO SELECT FROM THESE CHOICES: 1 . .
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Operating the Instrument from the Front Panel Channel Configuration 3 Table 3-6. RTD Temperature Channel PRESS THESE BUTTONS: TO SELECT FROM THESE CHOICES: G D 0 1 . . 20 Type (Note 1) Function F G D OFF V DC V AC Ω Hz °C or °F E G D J K E T N R S b C Pt R0 (Ice Point) (Note 3) Terminals (Note 2) E G D 2T 4T E G D H J E 100.00 Completes selection and returns to Inactive Mode Note 1. Pt selects RTD temperature measurement (DIN/IEC 751).
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2620A, 2625A Users Manual Alarm evaluation is not carried out for a channel if: • The limit sense is changed to "OFF". Alarm checking and the alarm limit values are re-enabled by setting limit sense to "HI" or "LO". • An open thermocouple has been detected on that channel (thermocouple temperature function only). Table 3-7. Alarm Selection Channel G D PRESS THESE BUTTONS: Alarm A G D E E Complete Alarm Parameters (Below) 0 TO SELECT FROM THESE CHOICES: 1 . .
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Operating the Instrument from the Front Panel Channel Configuration 3 Alarm annunciation is disabled when the instrument is in Inactive or Configuration Mode. ALARM annunciation and evaluation follow these rules: 1. When any channel reading from the latest scan is in alarm (but the presently displayed channel is not in alarm or a scan interval countdown is in progress): "ALARM" annunciator is dimly lit. 2. If the presently displayed channel (i.e.
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2620A, 2625A Users Manual At any Configuration Reset (power up C or computer interface *RST), alarm limits on channels 4 through 20 are assigned to Digital I/O lines 4 through 7 in the "ORed" pattern shown in Table 3-8. These assignments can be changed via the Computer Interface. Each limit (S or T) for a channel can be assigned to any one digital output. Table 3-8.
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Operating the Instrument from the Front Panel Channel Configuration 3 be changed at any point is brightly lit (solid for digits, flashing for other annunciators); all other elements are dimly lit at this time. Table 3-9 presents a full description of the Mx+B configuration sequence. If you press C while setting the "M" value (anytime prior to showing the "B" value), no changes entered thus far are stored. If you press C while setting the "B" value, changes to M are stored and changes to "B" are discarded.
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2620A, 2625A Users Manual Table 3-9. Mx+B Selection Channe l PRESS THESE BUTTONS: G D TO SELECT FROM THESE CHOICES: 0 B Sign, M Value Decimal Point Position G D G D H J E H J ±0000 0000.0 000.00 00.000 0.0000 Sign, M Value Decimal Point Position PRESS THESE BUTTONS: G D G D TO SELECT FROM THESE CHOICES: ±0000 1 . . 20 H J E H J 0000.0 000.00 00.000 0.0000 Multiplier (Note 1) E G D H J m x1 k M E (Continue to B value below) Multiplier (Note 1) E G D H J E m x1 k M Note 1.
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Operating the Instrument from the Front Panel Instrument Configuration 3 This number editing technique occurs during Configuration Mode operations whenever you are setting a numeric value. Instances of number editing include the following: • R0 (RTD)Table 3-6 • Alarms Table 3-7 • Mx+B Scaling Table 3-9 • Scan Interval TimeTable 3-10 • Time/Date Table 3-13 Selecting Scan Interval The scan interval is the period between starts of measurement scans.
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2620A, 2625A Users Manual Table 3-11. Measurement Rate Selection Press these buttons: RATE(KJ)] G D To select from these choices: SLO FAST E (Completes selection and returns to Inactive Mode) Triggering To set the scan triggering type from the front panel, use the procedure shown in Table 312. Table 3-12. Trigger Type Selection Press these buttons: TRIGS(KJ)] G D To select from these choices: E OFF On ALAr Note: The three trigger types signify: "OFF" External triggering is disabled.
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Operating the Instrument from the Front Panel Measurement Connections 3 Setting Date and Time of Day The instrument features a built-in, battery-maintained clock and calendar. Verify or change the settings using the steps shown in Table 3-13. If necessary, refer to "Entering and Changing Numeric Values" for a more detailed description of the number changing technique used here. 3-13. Date/Time Selection Year “YEAR” Month.Day “Mn.dY” Hour.Minut e” Hr.
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2620A, 2625A Users Manual DC Volts, AC Volts, Frequency, and Thermocouples Any analog input channel (0 through 20) can be used to measure dc volts, ac volts, or frequency. For channel 0, use the two terminals on the front panel. For channels 1 through 20, use the H (high) and L (low) inputs on the rear panel Input Module. Note The terminals for channel 0 on the front panel do not support thermocouple measurements.
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2 3 4 5 6 7 8 9 10 3 1 H L H L H L H L H L H L H L H L H L H L 17 16 15 14 13 STRAIN RELIEF 18 19 20 12 H L H L H L H L H L H L H L H L H L 11 H L Operating the Instrument from the Front Panel Measurement Connections L H L H L L H H L L H L H L H H L L H H L L H H L L H H L L H H L L H H L H L H oo08f.eps Figure 3-2.
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2620A, 2625A Users Manual Resistance and RTD For all channels (0 through 20), 2-terminal resistance or RTD measurements are allowed. Four-terminal measurements can be made on channels 1 through 10 only. Refer to Figure 3-3. For each channel configured for 4-terminal measurements (channels 1-10 only), a second channel (numbered 10 higher than the first) becomes unavailable for any other type of measurement.
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Operating the Instrument from the Front Panel Measurement Connections 3 2-WIRE (2T) CONNECTION SOURCE 11 12 13 14 15 16 17 18 19 20 HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL (4-WIRE) SENSE (4-WIRE) 1 2 3 4 5 6 7 8 9 10 RESISTANCE OR RTD SOURCE USE H AND L TERMINALS FOR ANY CHANNEL. • CHANNEL 0 ON FRONT PANEL • CHANNELS 1 THROUGH 20 ON REAR PANEL INPUT MODULE (CHANNEL 8 SHOWN HERE).
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2620A, 2625A Users Manual Totalizing General Event counting (totalizing) is commonly used on production lines for counting items. The instrument counts events by detecting low-to-high voltage transitions; each low-tohigh transition increments the totalizer value by one. The maximum count is 65535; "OL" (for "overload") is displayed when the count exceeds this limit. Connections The totalizing input is made at the input labeled \Z (sigma) on the rear panel Digital I/O Connector (see Figure 3-4).
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Operating the Instrument from the Front Panel List Button Functions 3 Table 3-15. Review Array Activate (Note 1) N H 20 G Deactivate (Note 3) Review Points LAST MIN J N MAX or C • • • • D 0 LAST MIN MAX Note 1. Review array can be entered only from a channel that is defined for some type of measurement ("VDC", "VAC", etc.) Review array cannot be entered from a channel that is OFF. Note 2.
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2620A, 2625A Users Manual 07:41:37 02/09/91 CH LAST VALUE 1: 097.32 mVDC 2: 0.0973 VDC 3: 00.097 VDC 4: 000.10 VDC 5: OL mVAC 6: OL VAC 7: 05.511 VAC 8: 005.51 VAC 9: OL OHMS 10: OL kOHMS 11: 08.276 kOHMS 12: 008.28 kOHMS 13: 0.0083 MOHMS 14: 00.008 MOHMS 15: OL HZ 16: 9.7193 kHZ 17: 09.719 kHZ 18: 009.72 kHZ 19: 0.0097 MHZ MAX VALUE 098.51 mVDC 0.0985 VDC 00.099 VDC 000.10 VDC OL mVAC OL VAC 05.582 VAC 005.58 VAC OL OHMS OL kOHMS 08.374 kOHMS 008.37 kOHMS 0.0084 MOHMS 00.008 MOHMS OL HZ 9.7239 kHZ 09.
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Operating the Instrument from the Front Panel Autoprint 3 Autoprint The front panel setup procedure is summarized in Table 3-17. Begin this procedure by selecting MODE (K U). Select the scan data destination ("dESt" in right display) as "Print" (left display). For the Hydra Series II Data Logger, a destination of "both" can also be selected, allowing for simultaneous printing and storage. (For the Hydra Series II Data Acquisition Unit, "Print" is the only possible selection.
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2620A, 2625A Users Manual Table 3-17. Autoprint/Memory Storage Selection Mode (“MOdE”) (Note 2) Destination (“dESt”) (Note 1) Press these buttons:P MODE KU) To select from these choices: Note 1. Note 2. G E D G E D ALL ALAr trAnS Print StorE both “Print” Sends data to be printed through the RS-232 interface. “StorE” Sends data to be stored in memory. (Hydra Data Logger only.) “both” Sends data to be stored and printed (Hydra Data Logger only.
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Operating the Instrument from the Front Panel REM Annunciator 3 G and D can now be used to change the monitored channel. All other front panel buttons are locked out; a long beep results from their use. Press both F and B again to deactivate the Monitor Only function and return the instrument to normal front panel button operation (regular Monitor Function on.) Computer Interface-Initiated Lockouts Front Panel lockout can also be specified over the Computer Interface with the following commands.
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2620A, 2625A Users Manual 3-28
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Chapter 4 Using the Computer Interface Title Introduction ....................................................................................................... Front Panel and Computer Interface Operations........................................... Types of Computer Interface ........................................................................ Using the RS-232 Computer Interface .............................................................. Setting Communication Parameters (RS-232) .................
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2620A, 2625A Users Manual Status Byte Register.................................................................................. Reading the Status Byte Register ............................................................. Service Request Enable Register .............................................................. Instrument Event Register ........................................................................ Computer Interface Command Set ..............................................................
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Using the Computer Interface Introduction 4 Introduction The instrument can be operated from a host via commands sent through the rear panel computer interface. The host can be a terminal, controller, PC, or other computer. This chapter describes how to set up and operate the instrument via the RS-232 interface (standard with Hydra Series II Data Acquisition Unit and Hydra Series II Data Logger) or the IEEE-488 computer interface (optional with Hydra Series II Data Acquisition Unit only.
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2620A, 2625A Users Manual Setting Communication Parameters (RS-232) Baud rate ("bAUd"), parity ("PAR"), and echo ("Echo") parameters can be set directly by the user; number of data bits and number of stop bits cannot be set. Refer to Figure 41. For the instrument and host to communicate via the RS-232 interface, the communication parameters of the instrument must match those of the host. RS-232 communication parameters can be set only from the front panel.
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Using the Computer Interface Using the RS-232 Computer Interface 4 5. Press G or D to scroll to odd, even, or no parity, respectively. Press EE to select the displayed parity. 6. "Echo" now appears in the right display, with "On" or "OFF" appearing on the left display. When Echo is "On", each character sent to the instrument over the RS-232 interface is "echoed" back to the host. If Echo is "OFF", commands are not echoed. Press D or G to select echo "On" or "OFF".
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2620A, 2625A Users Manual 10:33:45 5/11/90 Lines following the time and date contain measurement data for channels that have been set up for this session. The last line of the printout contains the Totalizer count and the status of the digital I/O lines. Channel data is formatted to fit three readings onto an 80-column line. Each reading provides the following information: • Channel number, followed by a colon and a space (4 characters) • space or minus sign (1 character) • Digits and decimal point.
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Using the Computer Interface Using the RS-232 Computer Interface 4 Data for the oldest set of scan readings in Hydra Series II Data Logger memory can be retrieved with the LOG? query. Each set of scan readings is cleared from memory when read with LOG? The LOG? query returns the following information: • Date and time at the start of the logged scan.
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2620A, 2625A Users Manual To connect the instrument to a specific brand of RS-232 printer, use the cable that would be used to connect that printer to an RS-232 port on an IBM PC/AT (DB-9 connector). The RS42 cable is compatible with most serial printers; contact Fluke for printer compatibility information. Once the cable is connected, turn the instrument back on. You are now ready to operate the instrument over the RS-232 interface.
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Using the Computer Interface Using the IEEE-488 Interface 4 RS-232 Prompts The instrument parses and executes, in turn, each command received from the host over the RS-232 interface. The instrument returns one of the following three response prompts to indicate the results of command execution: => No errors; the command was successfully parsed and executed. ?> The command was not understood. Used when an IEEE-488.2 Command Error or Query Error was generated by the command.
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2620A, 2625A Users Manual 10 ’ EXAMPLE.BAS Hydra program to scan VDC, VAC, OHMS, FREQ, or TEMP 20 ’ - initialize RS232 communication and set up Hydra 30 ’ - display and record measurement data in "TESTDATA.
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Using the Computer Interface Using the IEEE-488 Interface 500 510 520 530 540 550 560 570 580 590 595 597 598 600 610 612 620 640 650 660 670 680 690 700 710 720 730 740 750 760 770 780 800 810 820 830 840 850 4 PRINT #1, "FUNC " + STR$(I) + "," + CMD$ GOSUB 800 NEXT I ’ LOCATE 23,1 PRINT "Measuring " + CMD$ + " " ’ Print to screen ’ FOR I = 1 TO 3 ’ Scan 3 times PRINT #1, "*TRG" ’ Start a single GOSUB 800 ’ Get prompt PRINT #1, "SCAN_TIME? : GOSUB 800 ’ Get scan time stamp LINE INPUT #1, RESULTS$ PRINT
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2620A, 2625A Users Manual Table 4-2. IEEE-488.1 Capabilities Capability Description SH1 and AH1 Read and write bus handshaking, including hold off. T5 Basic talker with serial poll and without talk only mode. Serial poll is used to return the instrument status byte to the controller. TE0 No extended talker. L4 Basic listener without listen only mode. Listen only mode is only useful for an IEEE-488 device like a printer. LE0 No extended listener.
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Using the Computer Interface General Information (RS-232 and IEEE-488) 4 2. Press D to scroll to "IEEE"; then press E to enable the IEEE-488 interface and disable the RS-232 interface. "IEEE" will not appear in the left display if the IEEE488 interface is not installed. 3. The instrument must now be assigned an address ("0" to "30", inclusive). If you want to make a change, scroll to the desired address with the G and D buttons. Then press E to select the displayed address.
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2620A, 2625A Users Manual Input Strings The instrument processes and executes valid input strings sent by the host. A valid input string is one or more syntactically correct commands, separated by semicolons (;), followed by an input terminator. ASCII and IEEE-488 bus codes are provided in Appendix B. The instrument stores received input in a 350-byte input buffer. Note Input strings received over the RS-232 interface are not executed or checked for proper syntax until an input terminator is received.
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Using the Computer Interface General Information (RS-232 and IEEE-488) 4 FUNC 1, OHMS, 3, 2 Select ohms function for channel 1 Select 30-kilohm range Select 2-wire (2T) connections FUNC 12, TEMP, K Select temperature measurement for channel 12 Select K-type thermocouple input FUNC 1, TEMP, PT, 2; RTD_R0 12, 101.
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2620A, 2625A Users Manual Sending Numeric Values to the Instrument (RS-232 and IEEE-488) Numeric values can be sent to the instrument as integers, real numbers, or real numbers with exponents, as shown in the following examples: EXAMPLE EXPLANATION +12345 123.45 -1.2345E2 Sends the signed integer “+12345” Sends the real number “123.45” 2 Sends -1.
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Using the Computer Interface General Information (RS-232 and IEEE-488) 4 loaded, the Message Available (MAV) bit in the Status Byte Register is set true. (For more information, see "Status Byte Register" later in this chapter.) Numeric output from the instrument is returned as shown in the following examples: • • Integer Values Examples 3 In response to RANGE? query, range is 3 for the selected function. 0 In response to ALARMS? query, there are no alarms on this channel.
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r & & & & & 7 6 5 4 3 2 1 0 Standard Event Status Enable Register Read Using *ESE? Write to Using *ESE Queue Not-Empty Output Queue Read by Serial Poll 7 6 ESB MAV 3 2 1 IEB MSS Logical OR & oo14f.
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Using the Computer Interface General Information (RS-232 and IEEE-488) 4 Table 4-4. Status Byte Register Bit 0 Name IEB Description Instrument Event Bit. When any bit in the Instrument Event Register is set and the corresponding mask bit(s) in the Instrument Event Enable register is set, this Instrument Event Bit in the Status Byte will be set. When read, the Instrument Event Bit is recomputed based on the new value from the Instrument Event Register and its mask, the Instrument Event Enable Register.
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2620A, 2625A Users Manual Table 4-5. Event Status Register Bit Name Description 0 OPC Operation Complete. Set true (1) upon execution of the *OPC command, indicating that the instrument has completed all selected pending operations. 1 not used Always set to 0. 2 QYE Query Error. Generated true (1) by the INTERRUPTED or UNTERMINATED message exchange state transitions. (See IEEE-488.2.) Sets the QYE bit of the Event Status Register. Under RS-232, this causes the "?>" prompt to be returned.
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Using the Computer Interface General Information (RS-232 and IEEE-488) 4 Service Request Enable Register The Service Request Enable Register (SRE) is an 8-bit register that enables or disables (i.e., masks) corresponding summary messages in the Status Byte Register (STB). The instrument can be programmed to make a service request on errors or when output is available.
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2620A, 2625A Users Manual Table 4-6. Instrument Event Register (IER) Note Whenever the Instrument Event Register is read, the condition bits are cleared. This register is used in conjunction with the Instrument Event Enable Register to determine the conditions under which the Instrument Event Bit of the Status Byte is set. Bit Name Description 0 ALT Alarm Limit Transition. Set high (1) when any measurement value has transitioned into or out of alarm.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-7.
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2620A, 2625A Users Manual Table 4-7.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-7.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference *CLS Clear Status Clears all event registers summarized in the status byte, except for Message Available, which is cleared only if *CLS is the first message in the queue. *ESE Event Status Enable Sets the Event Status Enable Register to the given value. *ESE = (0 .. 255) This is a mask for the Event Status Register and is the first step in determining which Events may issue an SRQ.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) *SRE Service Request Enable Sets the Service Request Enable Register to the given value. *SRE = (0 .. 255) If the value is greater than 255, a Command Error is generated. The value of bit 6 is ignored, since it is not used by the Service Request Enable Register.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) ALARMS? Active Alarms Query Returns alarm status for the indicated channel(s). The value returned represents data from the most recent scan. The most recent scan is the scan in progress or, if scanning is not in progress, the last completed scan. ALARMS? = (0 .. 20) If the channel specification field is left blank, values for all defined channels are returned (values for channels defined as OFF are not included.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) ALARM_ASSOC? Alarm Association Query Returns alarm output associations for the indicated channel and alarm limit. ALARM_ASSOC? , = (4 .. 20) = 1 2 Returns the digital output line number associated with the indicated alarm limit.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) ALARM_LIMIT Set Alarm Limit Store alarm limit information for the indicated channel and limit. The fields to be given (in order) are: ALARM_LIMIT ,,, = = = = (0 .. 20) 1 2 HI LO OFF Signed numeric quantity A Command Error is generated if a value is supplied when the sense is OFF.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) DIO_LEVELS? Digital I/O State Query Returns digital input and output levels for the eight configurable digital I/O lines. Returns an integer value representing the actual states of the digital I/O lines. The low-order eight bits are used to indicate the status of each configurable I/O line (0 indicates low; 1 indicates high.) Bits 0 through 7 correspond to I/O lines 0 through 7.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) MEASUREMENT Scaled “MX+B” Volts DC Volts AC Resistance Frequency Temperature Temperature FORMAT? UNITS STRING “VDC” “VAC” “OHMS” “Hz” “C” “F” Query Response Format Returns the format presently in use: The default. IEEE-488.2-compatible. No measurement units are allowed. Responses are RS-232-compatible, allowing a means of recording the units with the measurement value.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) For temperature functions, the "range" is a thermocouple type (J, K, E, T, N, R, S, B, C) or DIN/IEC 751 RTD (PT). Use of any other value causes an Execution Error. = 2 (2-terminal) 4 (4-terminal) Specification of terminals is necessary when the function type is OHMS or when an RTD temperature measurement is being defined.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) IEE? Instrument Event Enable Query Returns the present value of the Instrument Event Enable Register as an integer. IER? Instrument Event Register Query Returns the value of the Instrument Event Register as an integer, then clears all bits. INTVL Set Scan Interval Set scan interval time. INTVL ,, = (0 .. 9) = (0 .. 99) = (0 ..
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) LOCK Lock the instrument front panel so that only use of the arrow keys and the simultaneous use of F and B are recognized. The following LOCK commands are recognized: Unlock Lock and begin review. If the instrument is not in review, a review is begun (even if there are no defined channels.) Monitor lock. If the instrument is not already in monitor, an Execution Error is generated.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) The Totalizer count is returned as a scientific notation value in the range 0 through 65535 (00.000E+3 through 65.535E+3). If the Totalizer has overflowed, a value of 1E+9 is returned. An Execution Error is generated if this query is used with the IEEE-488 interface. The following example shows the type of data received in response to LOG?. The first line shows time and date. The second line shows measurement values.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) LOG_MODE Determines treatment of new scan data when memory is full (RS-232 only) LOG_MODE 0 Wrap around. When memory is full, oldest scans are discarded to make room for new scans. This is the default mode. 1 Discard new scans. New scans are stored only when memory becomes available. (See LOG? and LOG_CLR.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) MIN? Channel’s Minimum Value Returns minimum value(s) for channels measured in the most recent scan. The value returned represents data from the most recent scan. The most recent scan is the scan in progress or, if scanning is not in progress, the last completed scan. MIN? = (0 .. 20) If the channel specification field is left blank, values for all defined channels are returned.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) NEXT? Next Scan’s Values The NEXT? query returns data values for the next scan to complete. If a scan is in progress when the NEXT? query is processed, the data values returned are from the scan in progress. If a scan is not presently in progress, the NEXT? query waits for data to become available. When scanning is occurring, use the NEXT? query to return data from each scan.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) PRINT_TYPE? Data Logging Type Query (RS-232 only) Return the Autoprint or internal Memory Storage type and the type of scan data logged. Returns 0 (AUTOPRINT), 1 (STORE), OR 2 (BOTH), and 0 (ALL), 1 (ALARM), or 2 (TRANS). For example, "1,0" could be returned, signifying that all scan data is sent to internal Memory Storage. An Execution Error is generated if this query is used with the IEEE-488 interface.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) REMS Remote without Lockout (RS-232 only) Enter the IEEE-488.1 remote without front panel lockout (REMS) state. The REM annunciator is lit, and only the following three front panel buttons are now active (with special REMS functionality): Q triggers a single scan. G generates a service request. K returns the instrument to normal front panel control.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) RWLS Remote with Lockout (RS-232 only) Enter the IEEE-488.1 remote with front panel lockout (RWLS) state. All front panel buttons are disabled, and the REM annunciator is lit. If this command is used with the IEEE-488 interface, an Execution Error is generated. SCALE_MB Set Mx+B Scaling Values Set the M and B scaling values for the indicated channel, and display the results of the Mx+B calculation in the indicated display range.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) SCALE_MB? Mx+B Scaling Values Query Return the M and B scaling values for the indicated channel. SCALE_MB? = (0 .. 20) If the channel number given is invalid, an Execution Error is generated. Remember that Mx+B scaling values are automatically reset to 1 (M) and 0 (B) when the function for that channel is changed. This command returns three values.
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2620A, 2625A Users Manual Table 4-8. Command and Query Reference (cont) Use the lowest two bits of the value given as individual flags to specify the temperature configuration. Therefore, the value given must be in the range from 0 through 3 or an Execution Error is generated. These settings affect every channel; they cannot be set for each channel individually. If this command is attempted when measurements are active, an Execution Error results.
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Using the Computer Interface Computer Interface Command Set 4 Table 4-8. Command and Query Reference (cont) TOTAL Set Totalizer Count Give the Totalizer count a new initial value. TOTAL = (0 .. 65535) If the value is not in the range 0 through 65,535, an Execution Error is generated. Clear the Totalizer count by setting the Totalizer to zero (0). TOTAL? Totalizer Value Query Returns the value of the present Totalizer count. Format of the value is +00.000E+3.
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2620A, 2625A Users Manual Table 4-8.
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Chapter 5 Additional Considerations Title Introduction ....................................................................................................... Measurement Rate............................................................................................. Advanced Trigger Mechanisms......................................................................... Front Panel Trigger Control.......................................................................... Computer Interface Trigger Control ...
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2620A, 2625A Users Manual 5-2
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Additional Considerations Introduction 5 Introduction Chapter 5 discusses some topics that will help you use the instrument more effectively. These considerations assume that you are familiar with the basic operation of the instrument and have some basic understanding of electronics. Measurement Rate The two measurement rates provide a choice of maximum accuracy and noise rejection (slow rate) or maximum throughput (fast rate). The selected rate applies to all channels on the instrument.
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2620A, 2625A Users Manual Verify the trigger type over the computer interface by sending the query: TRIGGER? Single scans can be triggered via the RS-232 interface or the IEEE-488 interface by sending the *TRG command. Note that the IEEE-488 interface GET command can be used only when the IEEE-488 interface is enabled. Note If the instrument is in the remote state without front panel lockout (i.e., REMS), a *TRG can be generated from the front panel by pressing Q.
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Additional Considerations Advanced Trigger Mechanisms ALARM OUTPUTS + –– 00 + 9-16 V DC PWR 5 DIGITAL I/O 1 2 2 3 1 3 TR TR 0 1 2 3 4 5 6 7 Σ +30V ! 7.0V HIGH VALID EXTERNAL TRIGGERS SCAN TIME SCAN HIGH ≥ 100 mS 2.0V 0.8V 0 –0.6V LOW FALLING EDGE HELD 5 µS IGNORED (SCAN IN PROGRESS) oo15f.eps Figure 5-1.
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2620A, 2625A Users Manual Monitor Alarm Enabled (Type 2) This corresponds to the Front Panel ALAr or Computer Interface TRIGGER=2 setting. When the Monitor Alarm trigger is enabled and the Monitor function is on, a scan is triggered if the monitor measurement is found to be in alarm. After this scan occurs, a monitor measurement is again made. If the monitor measurement is still in alarm, another scan is triggered. This pattern continues as long as the monitor channel remains in alarm.
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Additional Considerations When Measuring Resistance or Temperature (Rtd) 5 2-WIRE (2T) CONNECTION SOURCE 11 12 13 14 15 16 17 18 19 20 HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL (4-WIRE) SENSE (4-WIRE) 1 2 3 4 5 6 7 8 9 10 RESISTANCE OR RTD SOURCE USE H AND L TERMINALS FOR ANY CHANNEL. • CHANNEL 0 ON FRONT PANEL • CHANNELS 1 THROUGH 20 ON REAR PANEL INPUT MODULE (CHANNEL 8 SHOWN HERE).
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2620A, 2625A Users Manual Table 5-1. Ohms Test Voltage Range • Typical Full Scale Voltage 300.00 Ω 0.22 3.0000 kΩ 0.25 30.000 kΩ 0.29 300.00 kΩ 0.68 3.0000 MΩ 2.25 10.000 MΩ 2.72 4-Terminal Configuration In 4-terminal configuration, the instrument uses a second pair of leads to automatically eliminate measurement-lead and internal-relay resistance errors. With measurement lead and internal relay resistances eliminated, this configuration yields the most accurate readings.
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Additional Considerations Making Mixed Measurements 5 average-responding measurement devices display the correct rms reading of 1.0000V (the dc component equals 0). However, consider the 2V (peak-to-peak) square wave. Both types of measurement correctly display the dc component (0V), but the instrument also correctly measures the ac component (1.0000V). The average-responding device measures 1.111V, which amounts to an 11% error.
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2620A, 2625A Users Manual PEAK VOLTAGES AC-COUPLED INPUT WAVEFORM SINE MEASURED VOLTAGES AC COMPONENT ONLY PK-PK 0-PK RMS CAL* HYDRA DC AND AC TOTAL RMS DC COMPONENT TRUE RMS = ONLY ac 2 + dc 2 2.828 1.414 PK 1.000 PK-PK 0 1.000 0.000 1.000 RECTIFIED SINE (FULL WAVE) 1.414 1.414 0.421 PK 0.436 0.900 PK-PK 0 1.000 RECTIFIED SINE (HALF WAVE) 2.000 2.000 0.779 PK 0.771 PK-PK 0 0.636 1.000 SQUARE 2.000 1.000 PK 1.111 0 1.000 PK-PK 0.000 1.000 RECTIFIED SQUARE 1.414 1.414 0.
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Additional Considerations Using Shielded Wiring • Avoid connecting inputs with ac volts signals to any channel 10 numbers away from a sensitive channel (i.e. 4-terminal input channels.) • Avoid tying L (low) or (especially) H (high) inputs of a sensitive channel to earth (chassis) ground. This is very important in resistance measurements. • Avoid high source impedances on sensitive channels, or minimize the capacitance of the sensitive channel to earth (chassis) ground for high impedance inputs.
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2620A, 2625A Users Manual 1. Connect the shield to L (low) at the 2620A-100 Input Module, and try connecting the sensor shield to a quiet earth ground at or very near the measurement sensor end (and at only one place), or 2. Connect the shield to L (low) at the Input Module, and try connecting the shield to earth ground (only) as close to the rear of the instrument as possible. Isolated and shielded sensors will likely result in the best instrument measurement performance possible in a noisy environment.
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Chapter 6 Maintenance Title Introduction ....................................................................................................... Cleaning............................................................................................................. Line Fuse ........................................................................................................... Self-Test Diagnostics and Error Codes ............................................................. Performance Tests ...........
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2620A, 2625A Users Manual 6-2
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Maintenance Introduction 6 Introduction This chapter describes basic maintenance that the instrument user can perform. Do not attempt any maintenance not described in this chapter. For additional maintenance, service, and calibration procedures, qualified service personnel can refer to the Hydra Series II Service Manual (P/N 688868). Cleaning Warning To avoid electrical shock or damage to the instrument, never get water inside the case.
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2620A, 2625A Users Manual Power-Line Cord Connector To Remove, Squeeze and Slide Out + – 9DC16 V PW R 0 1 2 3 DI GI TR 0V 0 ! 1 Co Line Fuse (T 125 mA, 250V, Slow Blow) TA LI /O +3 2 mp 3 li 4 pu es wit rsu h M an the EE 5 t to lim TS Su it f 08 6 bp or a 7 1 art 7 J o clas B fP sB art co 15 mp of utin FC g C R dev ule ice s Σ Fuse Holder (Spare Fuse Provided) oo18f.eps Figure 6-1.
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Maintenance Performance Tests 6 Table 6-1.
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2620A, 2625A Users Manual Table 6-2. Recommended Test Equipment Instrument Type Multifunction Calibrator Minimum Specification Recommended Model DC Voltage: Fluke 5700A Range: 90 mV to 300V dc Accuracy: .005% AC Voltage: Frequency Voltage Accuracy 1 kHz 29 mV to 300V 0.05% 100 kHz 15 mV to 300V 1.25% 1V rms .0125% Frequency: 10 kHz Decade Resistance Source Ohms Accuracy 290Ω 0.0125% 2.9 kΩ 0.0125% 29 kΩ 0.0125% 290 kΩ 0.0125% 2.9 MΩ 0.0125% General Resistance Inc.
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Maintenance Performance Tests 6 Accuracy Verification Test 1. Power up the instrument and allow it to temperature stabilize for 1/2 hour. 2. Connect a cable from the Output VA HI and LO connectors of the 5700A to the VΩ and COM connectors on the front panel of the Hydra Series II Instrument. Select the channel 0 function and range on the Hydra Series II and the input level from the 5700A using the values listed in Table 6-3.
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2620A, 2625A Users Manual Table 6-3. Performance Tests (Voltage, Resistance, and Frequency) Function Range Input Level Frequency Display Accuracy (1 year, 18-28°C) MIN DC Volts MAX 300 mV 0V -- -0.02 0.02 300 mV 150 mV --- 149.94 150.06 300 mV 290 mV --- 289.91 290.09 3V 2.9V --- 2.8991 2.9009 -3V -2.9V --- -2.9009 -2.8991 30V 29V --- 28.991 29.009 150V 150V --- 149.94 150.06 300V 290V --- 289.91 290.
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Maintenance Performance Tests 6 Table 6-3. Performance Tests (Voltage, Resistance, and Frequency) (cont) Using inputs in decades of 1.9: 300 Ω short 0.00 0.09 190 Ω 189.93 190.12 short 0.0000 0.0003 1.9 kΩ 1.8992 1.9008 30 kΩ 19 kΩ 18.992 19.008 300 kΩ 190 kΩ 189.91 190.09 3 MΩ 1.9 MΩ 1.8983 1.9017 short 0.00 0.09 100 Ω 99. 95 100.10 3 kΩ short 0.0000 0.0003 3 kΩ 1 kΩ 0. 9995 1.0006 30 kΩ 10 kΩ 9. 995 10.005 300 kΩ 100 kΩ 99. 94 100.06 3 MΩ 1 mΩ 0. 9990 1.
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2620A, 2625A Users Manual 3. Connect a cable from the Output VA HI and LO connectors of the 5700A to the VΩ and COM connectors on the front panel of the Hydra Series II Instrument. 4. Set the 5700A to output 0V dc 5. Using either a terminal or a computer running a terminal emulation program as the selected host, send the following commands to Hydra Series II: FUNC 0,VDC,I100MV MON 1,0 MON_VAL? The returned value for channel 0 should be 0 mV ±0.006 mV. Set the 5700A to output 90 mV DC.
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Maintenance Performance Tests 6 Note 4-terminal connections are made using pairs of channels. 4-terminal measurements can only be made on channels 1 through 10. The accompanying pairs are channels 11 through 20. Thermocouple Temperature Accuracy Test Assure the Thermocouple Measurement Range Accuracy Test meets minimum acceptable levels before performing this test. 1. Switch OFF power to the instrument and disconnect all high voltage inputs. 2. Remove the Input Module from the rear of the instrument.
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2620A, 2625A Users Manual SOURCE 11 12 13 14 15 16 17 18 19 20 HL HL HL HL HL HL HL HL HL HL (4-WIRE) SENSE HL HL HL HL HL HL HL HL HL HL HYDRA INPUT MODULE (4-WIRE) 1 2 3 4 5 6 7 8 9 10 5700A OUTPUT V ΩA SENSE VΩ WIDEBAND HI HI LO LO HI AUX CURRENT GUARD GROUND NC NC EX SNS : ON EX GRD : OFF 2-WIRE COMP OFF SENSE SOURCE UUT 5700A SOURCE SENSE oo19f.eps Figure 6-2.
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Maintenance Performance Tests 6 4-WIRE (4T) CONNECTION SOURCE 11 12 13 14 15 16 17 18 19 20 HL HL HL HL HL HL HL HL HL HL (4-WIRE) SENSE HL HL HL HL HL HL HL HL HL HL HYDRA INPUT MODULE (4-WIRE) 1 2 3 4 5 6 7 8 9 10 DECADE RESISTANCE BOX oo20f.eps Figure 6-3. 4-Terminal Connections to Decade Resistance Box Table 6-4. Performance Tests for Thermocouple Temperature Function (IPTS-68/ITS-90) Thermocouple Type Thermocouple Accuracy Specifications 1 Year @ 18-28 Degrees C J ±0.
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2620A, 2625A Users Manual RTD Temperature Accuracy Test The following two RTD Temperature Accuracy Tests are different in that one uses a Decade Resistance Source and the other uses an RTD. Only one of the tests need to be performed to assure operation. RTD Temperature Accuracy Test (Using Decade Resistance Source) Assure Channel 0’s Accuracy Verification Test for DC Volts and 300 Ohm Resistance Range meets minimum acceptable levels. 1.
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Maintenance Performance Tests 6 RTD Temperature Accuracy Test (Using DIN/IEC 751) 1. Switch OFF power to the instrument and disconnect all other high voltage inputs. 2. Remove the Input Module from the rear of the instrument. Open the Input Module and connect a Platinum RTD, conforming to the European Standards IEC 751 (DIN 43760). 2-terminal RTD: Connect the RTD’s excitation leads to the H (high) and L (low) terminals of channel 1.
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2620A, 2625A Users Manual Digital Output Test 1. Ensure that communication parameters (i.e., transmission mode, baud rate, parity, and echo mode) on the Hydra Series II and the host are properly configured to send and receive serial data. Refer to Chapter 4. 2. Switch OFF power to the instrument and disconnect all high voltage inputs. 3. Remove the Digital I/O ten terminal connector from the rear of the instrument and all external connections to it.
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Maintenance Performance Tests 6 Verify that the returned value as shown on the Host screen = 255. Note The number returned is the decimal equivalent of the Digital Input binary word (inputs 0 through 7’s status). See Table 6-7 to determine if the number returned corresponds to the bits jumpered to ground in this test. 3. Jumper input 0 to ground by connecting the ground test lead to input 0’s test lead.
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2620A, 2625A Users Manual 5. Press the TOTAL button on the front panel of Hydra Series II. Assure Hydra Series II displays a 0 value. 6. Jumper output 0 to the Total (∑) input by connecting the (∑) terminal test lead to output 0’s test lead. 7. Using either a terminal or a computer running a terminal emulation program, set up Hydra Series II to toggle (turn ON and OFF) Digital Output 0.
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Maintenance Performance Tests 6 Hydra Series II’s display should now show the totalizing value incrementing at a 10 count per second rate. Dedicated Alarm Output Test The Dedicated Alarm Output Test verifies that Alarm Outputs 0 through 3 are functioning properly. Because this test is dependent on voltage readings the Accuracy Verification Test for channel 0 and the Channel Integrity Test for channels 1 through 3 should be performed if voltage readings are suspect. 1.
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2620A, 2625A Users Manual ALARM OUTPUTS ALARM OUTPUT CONNECTOR ++ –– DIGITAL I/O 0 1 2 3 4 5 6 7 Σ 00 11 22 33 TR TR +30V 9-16 V DC PWR 0 1 2 3 GND SOURCE INPUT MODULE ! 11 12 13 14 15 16 17 18 19 20 HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL HL (4-WIRE) SENSE (4-WIRE) 1 2 3 4 5 6 7 8 9 10 5700A HYDRA FRONT PANEL OUTPUT VΩA SENSE VΩ WIDEBAND HI HI LO LO REVIEW LAST COM VΩ HI 300V MAX FUNC Mx+B ALRM AUX GUARD GROUND CURRENT (USE STACKED BANANA JACKS
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Maintenance Calibration 6 External Trigger Input Test The External Trigger Input Test verifies that the rear panel trigger input of Hydra Series II is functioning properly. 1. Switch OFF power to the instrument and disconnect all high voltage inputs. 2. Remove the Alarm Output eight terminal connector module from the rear of Hydra Series II and all external connections to it. Connect short wires (to be used as test leads) to the ground (J) and TR terminals.
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2620A, 2625A Users Manual no parts to disassemble, no mechanical adjustments to make, and the instrument can be calibrated by an automated instrumentation system. The instrument should normally be calibrated on a regular cycle, typically every 90 days or 1 year. The chosen calibration cycle depends on the accuracy specification you wish to maintain. The instrument should also be calibrated if it fails the performance test or has undergone repair.
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Appendices Appendix A B C D E F Title Specifications....................................................................................................... ASCII & IEEE-488 Bus Codes ............................................................................ IEEE-488.2 Devise Documentation Requirements.............................................. Making Mixed Measurements ............................................................................. Binary Upload of Logged Data (LOG_BIN?) (2625A only)...
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Appendix A Specifications Introduction The instrument specifications presented here are applicable within the conditions listed in the Environmental chapter. The specifications state total instrument accuracy following calibration, including: • A/D errors • Linearization conformity • Initial calibration errors • Isothermality errors • Relay thermal emf’s • Reference junction conformity • Temperature coefficients • Humidity errors Sensor inaccuracies are not included in the accuracy figures.
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2620A/2625A Users Manual DC Voltage Inputs Range Resolution Slow Fast 300 mV 10 µV 0.1 mV 3V 0.1 mV 1 mV 30 V 1 mV 10 mV 300 V 10 mV 0.1 V Accuracy ± (% ± V) Range 18°C to 28°C 90 Days, Slow 1 Year, Slow 0°C to 60°C 1 Year, Fast 1 Year, Slow 1 Year, Fast 300 mV 0.018% + 20 µV 0.023% + 20 µV 0.040% + 0.2 mV 0.067% + 20 µV 0.084% + 0.2 mV 3V 0.019% + 0.2 mV 0.024% + 0.2 mV 0.041% + 2 mV 0.065% + 0.2 mV 0.082% + 2 mV 30V 0.019% + 2 mV 0.024% + 2 mV 0.041% + 20 mV 0.
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Appendices Specifications A Thermocouple Inputs Temperature Measurements - Accuracy (Thermocouples) (IPTS-68) Thermocouple Accuracy (±°C)* 18°C to 28°C Type Temperatur e (C°) -100 to -30 J K N E T R S B C 90 Days Slow 0.43 0°C TO 60°C 1 Year Slow 1 Year Fast 1 Year Slow 1 Year Fast 0.44 0.91 0.55 1.09 -30 to 150 0.38 0.40 0.81 0.58 1.02 150 to 760 0.43 0.47 0.92 0.87 1.36 -100 to -25 0.52 0.53 1.13 0.65 1.31 -25 to 120 0.43 0.45 0.94 0.63 1.17 120 to 1000 0.
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2620A/2625A Users Manual Temperature Measurements - Accuracy (Thermocouples) (ITS-90) Thermocouple Accuracy (±°C)* 18°C to 28°C Type (°C) Temperatur e 0°C to 60°C 90 Days 1 Year 1 Year 1 Year 1 Year Slow Slow Fast Slow Fast -100 to -30 0.44 0.45 0.92 0.57 1.10 -30 to 150 0.41 0.43 0.83 0.61 1.06 150 to 760 0.48 0.53 0.98 0.92 1.42 -100 to -25 0.53 0.54 1.14 0.66 1.33 -25 to 120 0.46 0.48 0.96 0.66 1.19 120 to 1000 0.79 0.85 1.55 1.45 2.20 1000 to 1372 1.
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Appendices Specifications A Input Impedance 100 MΩ minimum in parallel with 150 pF maximum Common Mode and Normal Mode Rejection See Specifications, DC Voltage Inputs Cross-Talk Rejection Refer to Appendix D Open Thermocouple Detect Small ac signal injection and detection scheme before each measurement detects greater than 1 to 4 kΩ as open. Performed on each channel unless defeated by computer command.
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2620A/2625A Users Manual IEC 751, Amendment 2, 100 e Platinum (ITS-90) RTD 4 Wire Accuracy* (±°C) Temperature (°C) Resolution Slow Fast -200.00 0.02 0.1 0.00 0.02 100.00 18°C to 28°C 90 Day Slow 0°C to 60°C 1 Year Slow 1 Year Fast 1 Year Slow 1 Year Fast 0.13 0.13 0.54 0.13 0.55 0.1 0.09 0.09 0.55 0.13 0.59 0.02 0.1 0.12 0.12 0.59 0.18 0.66 300.00 0.02 0.1 0.23 0.24 0.74 0.34 0.85 600.00 0.02 0.1 0.55 0.56 1.12 0.73 1.
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Appendices Specifications A 1 Year Accuracy ±(% ± V) Range 300 mV 3V 30V 300V Frequency 18°C to 28°C 0°C to 60°C Slow Fast Slow Fast 20 Hz - 50 Hz 1.43% + 0.25 mV 1.43% + 0.4 mV 1.54% + 0.25 mV 1.54% + 0.4 mV 50 Hz - 100 Hz 0.30% + 0.25 mV 0.30% + 0.4 mV 0.41% + 0.25 mV 0.41% + 0.4 mV 100 Hz - 10 kHz 0.16% + 0.25 mV 0.16% + 0.4 mV 0.27% + 0.25 mV 0.27% + 0.4 mV 10 kHz - 20 kHz 0.37% + 0.25 mV 0.37% + 0.4 mV 0.68% + 0.25 mV 0.68% + 0.4 mV 20 kHz - 50 kHz 1.9% + 0.30 mV 1.
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2620A/2625A Users Manual Frequency Maximum Input at Upper Frequency 20 Hz - 50 Hz 300 V rms 50 Hz - 100 Hz 300 V rms 100 Hz - 10 kHz 200 V rms 10 kHz - 20 kHz 100 V rms 20 kHz - 50 kHz 40 V rms 50 kHz - 100 kHz 20 V rms Input Impedance 1 MΩ in parallel with 100 pF maximum Maximum Maximum Crest Factor 3.0 2.0 for rated accuracy Crest Factor Error Non-sinusoidal input signals with crest factors between 2 and 3 and pulse widths 100 µs and longer add 0.2% to the accuracy specifications.
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Appendices Specifications A Ohms Inputs Range Typical Full Resolution Scale Voltage Maximum Current Through Unknown Maximum Open Circuit Voltage Slow Fast 300 Ω 10 mΩ 0.1 Ω 0.22 V 1 mA 3.2V 3 kΩ 0.1 Ω 1Ω 0.25V 110 µA 1.5 V 30 kΩ 1Ω 10 Ω 0.29 V 13 µA 1.5 V 300 kΩ 10 Ω 100 Ω 0.68 V 3.2 .µA 3.2 V 3 MΩ 100 Ω 1 kΩ 2.25 V 3.2 µA 3.2 V 10 MΩ 1 kΩ 10 kΩ 2.72 V 3.2 µA 3.
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2620A/2625A Users Manual Frequency Inputs Frequency Range 15 Hz to greater than 1 Mhz Range Accuracy + (% ± Hz) Resolution Slow Fast Slow Fast 15 Hz - 900 Hz 0.01 Hz 0.1 Hz 0.05% + 0.02 Hz 0.05% + 0.2 Hz 9 kHz 0.1 Hz 1 Hz 0.05% + 0.1 Hz 0.05% + 1 Hz 90 kHz 1 Hz 10 Hz 0.05% + 1 Hz 0.05% + 10 Hz 900 kHz 10 Hz 100 Hz 0.05% + 10 Hz 0.05% + 100 Hz 1 MHz 100 Hz 1 kHz 0.05% + 100 Hz 0.
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Appendices Specifications A Typical Scanning Rate See table below. The measurement conditions are: averaged rate over 20 scans; continuous scanning; alarm limits and Mx+B scanning set on all channels; logging data to internal memory; and RS-232 communications set at 9600 baud. Measurements were taken with short-circuit inputs on all channels, except frequency, which was taken with 5V at 15 Hz on all channels.
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2620A/2625A Users Manual Maximum Autoranging Time (Seconds per Channel) Function Range Change Fast 0.19 VDC 300 mV ----------------------------> 150 V 0.25 150 V 300 mV ----------------------------> 0.26 0.19 VAC 300 mV ----------------------------> 150V 4.50 150 V 300 mV ----------------------------> 1.38 1.08 Ohms 300 Ω ----------------------------> 10.0 MΩ 1.30 10.0 MΩ 300 Ω ----------------------------> 1.81 0.
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Appendices Specifications A Isolation none dc-coupled Threshold 1.4V Hysteresis 500 mV Trigger Input Input Voltages contact closure and TTL compatible “high” =2.0V min, 7.0V max “low” = -0.6V min, 0.
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2620A/2625A Users Manual Digital and Alarm Outputs Output Logic Levels Logical “zero”: Logical “one”: 0.8V max for an Iout of -1.0 mA (1LSTTL load) 3.8V min for an Iout of 0.05 mA (1LSTTL load) For non-TTL loads: 1.8V max for an Iout or -20 mA Logical “zero”: 3.
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Appendices Specifications A Altitude Operating: 2,000 m maximum Non-operating: 12,200 m maximum Vibration 0.7 g at 15 Hz 1.3 g at 25 Hz 3 g at 55 Hz Shock 30 g half sine per Mil-T-28800 Bench handling per Mil-T-28800 General Channel Capacity 21 Analog Inputs 4 Alarm Outputs 8 Digital I/O (inputs/outputs) Measurement Speed Slow rate: 4 readings/second nominal Fast rate: 17 readings/second nominal 1.
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2620A/2625A Users Manual Power 90V to 264V ac (no switching required), 50 and 60 Hz, 10 VA maximum 9V dc to 16V dc, 10W maximum If both sources are applied simultaneously, ac is used if it exceeds approximately 8.3 times dc. Automatic switchover occurs between ac and dc without interruption. (At 120V ac the equivalent dc voltage is ~14.5V). Standards IEC 1010-1, ANSI/ISA S82.01-1994, CSA-C22.2 No.1010.1-92, and EN61010-1:1993. Complies with EN 50081-1, EN 50082-1, Vfg.
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Appendix B ASCII & IEEE-488 Bus Codes B-1
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2620A/2625A Users Manual ASCII & B7 B6 0 B5 BITS 0 B4 0 0 0 0 0 0 0 16 10 DLE 17 GTL 2 DC1 18 3 DC2 19 ETX 4 EOT 11 12 ! 34 0 0 1 0 STX 3 13 35 4 DC3 20 14 # 36 SDC DC4 DCL 0 0 1 1 5 21 15 ENQ 6 PPC 6 NAK 22 7 SYN 23 PPU 16 MLA16 31 1 2 51 MLA18 33 B 67 2 3 MLA3 3 24 52 17 MLA21 5 8 8 24 18 BS 1 0 0 0 BS 9 GET 9 CAN 25 SPE 19 70 MLA6 27 6 55 MLA22 37 F 71 MLA7 7 MLA23 EM 26 SPD 1A ( ( HT 10 TCT A ) * SUB B VT 1 0 1 1 VT 12 1 1
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Appendix C IEEE-488.2 Devise Documentation Requirements Introduction Section 4.9 of the IEEE Standard 488.2-1987 states: "All devices shall supply information to the user about how the device has implemented this standard." (In this context, "device" means the Fluke 2620A Hydra Series II Data Acquisition Unit. The Fluke Hydra Series II Data Logger cannot be equipped for IEEE-488 operation.) The information in Appendix C is provided in compliance with this requirement. Implementation of IEEE Standard 488.
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2620A/2625A Users Manual Measurement rate: Slow. Scaling (M):1 (all channels) Offset (B): 0 (all channels) Alarm parameters: Limit-1 and Limit-2 OFF. All limit values 0. Alarm assignments: Channels 0-3 assigned to outputs 0-3,respectively. Channels 4-20 assigned to digital I/O lines 4-7, as shown in Table 3-8. Scan interval time: 0:00:00 (continuous) Review values (MIN, MAX, LAST) cleared for all channels. Digital I/O lines: high (non-alarm) Totalizer: 0, with debounce disabled.
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Appendices IEEE-488.2 Devise Documentation Requirements C 7. A description of any buffer size limitations related to block data, Section 7.7.6.5. No block data is used. 8.
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2620A/2625A Users Manual There are no device-to-device messages. 11. The size of any block data responses, Section 8.7.9.4. There are no block data responses. 12. A list of common commands and queries which are implemented, Section 10. *CLS, *ESE, *ESE?, *ESR?, *IDN?, *OPC, *OPC?, *RST, *SRE, *SRE?, *STB?, *TRG, *TST?, *WAI 13. A description of the state of the device after successful completion of the Calibration query, Section 10.2. The *CAL? command not implemented (an optional command). 14.
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Appendices IEEE-488.2 Devise Documentation Requirements C 22. For each command, a statement describing whether is overlapped or sequential. All commands are sequential; none are overlapped. 23. For each command, the device documentation shall specify the functional criteria that are met when an operation complete message is generated in response to that command, Section 12.8.3. Operation complete is generated when the command is parsed.
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2620A/2625A Users Manual C-6
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Appendix D Making Mixed Measurements Introduction This appendix augments the discussion of ac signal effects on other channels (cross talk) found in Chapter 5 ("Making Mixed Measurements"). Effects on each measurement function are discussed below. These numbers should only be considered as references. Since cross talk can be introduced into a measurement system in many places, each setup must be considered individually.
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2620A/2625A Users Manual AC Signal Cross Talk Into an AC Voltage Channel   VACrms(error ) VACrms(crosstalk ) × Frequency(crosstalk )    ACV Error Ratio = Range Ratio (worst case) Ratio (typical) × × × ×  v × Hz   v ×-6Hz   v × Hz  -7  v × Hz  30.000 V 1.2 × 10  2.6 × 10   v -5× Hz   v-6× Hz  150.00/300.00 1.2 × 10  3.
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Appendices Making Mixed Measurements D AC Signal Crosstalk Into a Temperature Channel Frequency = 50, 60 Hz  ° C (error )  TEMPERATURE Error Ratio =  VACrms(crosstalk )   Types J, K, E, T, N:  Worst case Typical  °C  Vrms  5.0 × 10-4   °C  Vrms  2.0 × 10-3   °C  Vrms  No Effect 2.7 × 10-3  Types R, S, B, C: 1.1 × 10-2  Type PT (RTD): 8.
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2620A/2625A Users Manual D-4
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Appendix E Binary Upload of Logged Data (LOG_BIN?) (2625A only) Introduction The LOG_BIN? query can be used to quickly upload logged data from a 2625A. The response is a single ASCII string, which encodes the raw binary data stored at the specified position. The logged data is also retained in the 2625A. The measurement data returned from the 2625A is in the (binary) IEEE single-precision floating point format. Making use of this data can be difficult and is very machine dependent.
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2620A/2625A Users Manual /* -* ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** */ decode(): Decode LOG_BIN? response string into raw byte stream Decoding is done on multiples of four input bytes: 543210 543210 543210 543210 +--------+--------+--------+--------+ | src[0] | src[1] | src[2] | src[3] | +--------+--------+--------+--------+ 765432 107654 321076 543210 / / / / / / | / / | / / | | / | | / | | | 76543210 76543210 76543210 +--------+--------+-----
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Appendices Binary Upload of Logged Data (LOG_BIN?) (2625A only) E The raw data output array contains the information listed below. Note that the number of floating point values is equal to the number of channels in use, plus one. (The totalizer count is always present in the data, and is stored as a floating point number.
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2620A/2625A Users Manual The floating point format used is 32-bit with a 1-bit sign, 8-bit exponent, and 24-bit mantissa with the most significant bit hidden under the LSB of the exponent. The number is formatted as shown in Table F-1. Table E-1.
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Appendices Binary Upload of Logged Data (LOG_BIN?) (2625A only) E /* Import globals from main program */ extern int timestamp[]; extern int misc[]; extern float values[]; /* -* ** ** ** ** ** ** ** ** ** ** ** ** ** */ convert(): Convert a LOG_BIN? array of binary data into useful data Converts BCD values to integer, raw floating point values into float values usable under the Intel x86 (IBM PC) architecture.
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2620A/2625A Users Manual /* Globals convert() uses for destination */ int timestamp[6]; /* Scan timestamp */ int misc[3]; /* Temperature units, measurement rate, digital I/O */ float values[22]; /* Measurement values */ extern int isnan(); extern int isinf(); /* Floating point value is NaN (not a number) */ /* Floating point value is Inf (infinity) */ /* -* main(): LOG_BIN? query response example program ** ** Converts a hard-coded LOG_BIN? response string into usable data.
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Appendix F RS-232 Cabling Introduction This appendix details the RS-232 cabling between the instrument and a PC, instrument controller (Fluke 17XXA series), printer, or modem. All connections can be made using the Fluke RS-series of cables (see Options and Accessories in Chapter 1). RS-232 cables should not exceed 50 feet (15 meters) although longer cables are permitted if the load capacitance measured at a connection point (including signal terminator) does not exceed 2500 picofarads.
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2620A/2625A Users Manual For example, connection to a serial-to-parallel converter (when using a printer with a parallel input) may be as a DTE (cable RS42) or DCE (cable RS40).
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Appendices RS-232 Cabling F RS43 CABLE (NULL MODEM) HYDRA PC 1 1 DCD Rx 2 2 Rx Tx 3 3 Tx DTR 4 4 DTR GND 5 5 GND DSR 6 6 DSR RTS 7 7 RTS CTS 8 8 CTS 9 9 RI RS-232C DB-9 DB-9 PINS FEMALE MALE COM KEY DCD – DATA CARRIER DETECT Rx – RECEIVE Tx – TRANSMIT DTR – DATA TERMINAL READY GND – GROUND DSR – DATA SET READY RTS – REQUEST TO SEND CTS – CLEAR TO SEND RI – RING INDICATOR oo73f.eps Figure F-2.
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2620A/2625A Users Manual RS40 CABLE (OR EQUAL) PC 1 2 Tx 3 Rx 4 RTS 5 CTS 6 DSR 7 GND 1 8 DCD Rx 2 9 Tx 3 10 DTR 4 11 GND 5 12 DSR 6 13 RTS 7 14 CTS 8 15 9 16 HYDRA 17 RS-232C DB-9 18 19 PINS FEMALE MALE 20 KEY Tx – TRANSMIT 21 Rx – RECEIVE RTS – REQUEST TO SEND CTS – CLEAR TO SEND DSR – DATA SET READY GND – GROUND DCD – DATA CARRIER DETECT DTR – DATA TERMINAL READY RI – RING INDICATOR 22 DTR RI 23 24 25 DB-25 COM oo74f.eps Figure F-3.
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Appendices RS-232 Cabling RS41 CABLE (OR EQUAL) F MODEM 1 2 Tx 3 Rx 4 RTS 5 CTS 6 DSR 7 GND 1 8 DCD Rx 2 9 Tx 3 10 DTR 4 11 GND 5 12 DSR 6 13 RTS 7 14 CTS 8 15 9 16 HYDRA 17 RS-232C DB-9 18 19 20 DTR 21 22 PINS FEMALE MALE 23 KEY 24 Tx – TRANSMIT Rx – RECEIVE RTS – REQUEST TO SEND CTS – CLEAR TO SEND DSR – DATA SET READY GND – GROUND DCD – DATA CARRIER DETECT RI 25 DB-25 DTR – DATA TERMINAL READY RI – RING INDICATOR oo07f.eps Figure F-4.
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2620A/2625A Users Manual RS42 CABLE (OR EQUAL) PRINTER 1 2 Tx 3 Rx 4 RTS 5 CTS 6 DSR 7 GND 1 8 DCD Rx 2 9 Tx 3 10 DTR 4 11 GND 5 12 DSR 6 13 RTS 7 14 CTS 8 15 9 16 HYDRA 17 RS-232C DB-9 18 19 20 DTR 21 22 PINS FEMALE MALE 23 KEY Tx – TRANSMIT 24 Rx – RECEIVE RTS – REQUEST TO SEND CTS – CLEAR TO SEND 25 DSR – DATA SET READY GND – GROUND DCD – DATA CARRIER DETECT RI DB-25 DTR – DATA TERMINAL READY RI – RING INDICATOR oo76f.eps Figure F-5.
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Appendices RS-232 Cabling 6 SOLDER SIDE 1 7 2 8 3 9 4 F CONNECTOR SIDE 5 MALE FEMALE 9 CONNECTOR SIDE 5 8 4 7 3 6 2 SOLDER SIDE 1 DB-9 CONNECTOR 13 12 11 10 SOLDER SIDE 25 9 8 7 6 5 4 3 2 1 24 23 22 21 20 19 18 17 16 15 14 MALE FEMALE 1 CONNECTOR SIDE CONNECTOR SIDE 2 14 3 4 5 6 7 8 9 10 11 12 13 15 16 17 18 19 20 21 22 23 24 25 SOLDER SIDE DB-25 CONNECTOR oo77f.eps Figure F-6.
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2620A/2625A Users Manual F-8
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Hydra Configuration Record SET-UP NAME_________________________________________ DATE_________________________ SCAN RATE: q Slow q Fast TEMPERATURE UNITS q °C q°F COMMUNICATION I/F q RS-232-C SCAN INTERVAL:_______ :_______: _______ Baud Rate _______________________ OUTPUT: q Printer q Memory Mode: q All Data q Alarm Data q Alarm Transition Data TRIGGERS: q Off q External Chan Input Name Parity q Even q Odd q None Echo q On q Off q IEEE-488 Address__________________ q Monitor Alarm Ch# ____ Type
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Index —2— 2-wire accuracy, A-6, A-9 —4— 4-terminal resistance test, 6-10 —A— AC signal cross talk in a dc voltage channel, D-1 AC signal cross talk into a frequency channel, D-2 AC signal cross talk into an ac voltage channel, D-2 AC signal cross talk into an ohms channel, D-2 AC signal crosstalk into a temperature channel, D-3 Accuracy verification test, 6-7 Advanced trigger mechanisms, 5-3 Alarm indications, 3-10 Alarm limits, 3-9 Autoprint, 3-25 computer interface control, 4-5 output format, 4-5 Autop
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2620A/2625A Users Manual Front panel trigger control, 5-3 —G— General, 3-22 General information (RS-232 and IEEE-488), 4-13 —H— How the instrument processes input, 4-13 Hysteresis, A-12 —I— —R— Rate, A-12 REM annunciator, 3-27 Resetting alarm conditions, 3-11 Resistance, 3-7 Resistance and RTD, 3-20 Review array, 3-22 RS-232 information, 4-8 RS-232 prompts, 4-9 RTD temperature accuracy test, 6-14 RTD temperature accuracy test (using decade resistance source), 6-14 RTD temperature accuracy test (using D