525B Temperature/Pressure Calibrator Users Manual July 2012 © 2012 Fluke Corporation, All rights reserved. All product names are trademarks of their respective companies.
LIMITED WARRANTY AND 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.
Table of Contents Chapter Title Page 1 Getting Started................................................................................... Introduction...................................................................................................... Contacting Fluke .............................................................................................. Standard Equipment......................................................................................... Options and Accessories ..........
525B Users Manual 4 Thermocouple Zero Calibration ........................................................... Measuring Temperature Using Resistance Temperature Detectors (RTDs) ...................................................................................... Entering and Using Custom RTDs ........................................................... Default RTD Coefficients ......................................................................... Entering Custom SPRT Coefficients .....................
Contents (continued) Programming the STB and SRE ........................................................... Event Status Register (ESR) ................................................................. Event Status Enable (ESE) Register ..................................................... Bit Assignments for the ESR and ESE ................................................. Programming the ESR and ESE ........................................................... Output Queue ................................
525B Users Manual DC Current Specifications, Output ........................................................... Resistance Specifications, Output............................................................. Resistance Specifications, Input ............................................................... Thermocouple Specification, Output and Input ........................................ RTD and Thermistor Specification, Output ..............................................
List of Tables Table 1-1. 1-2. 1-3. 1-4. 1-5. 2-1. 2-2. 3-1. 3-2. 4-1. 4-2. 4-3. 4-4. 4-5. 4-6. 4-7. 4-8. 4-9. 4-10. 4-11. 6-1. 6-2. 6-3. 6-4. 6-5. 6-6. 6-6. 6-8. 6-9. 6-10. Title Summary of Input and Output Functions......................................................... Symbols Used on the Calibrator ...................................................................... Pushbutton Usage Functions ............................................................................ Function Keys ...............
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List of Figures Figure 1-1. 1-2. 1-3. 1-4. 2-1. 2-2. 2-3. 2-4. 2-5. 3-1. 3-2. 3-3. 3-4. 3-5. 4-1. 4-2. 4-3. 4-4. 4-5. 4-6. 6-1. 6-2. 6-3. 6-4. 6-5. 6-6. 6-7. 6-8. 6-9. Title Input and Output Terminals and Connectors ................................................... Pushbuttons ...................................................................................................... Calibrator Function Keys ................................................................................. Rear Panel View ....
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Chapter 1 Getting Started Introduction Your Fluke 525B Temperature/Pressure Calibrator (referred to as the Calibrator) is an instrument designed to meet the demands of your process tools calibration workload. In addition to the functions in Table 1-1, the Calibrator has the following features and functions. • • • • Two line backlit LCD display 5-way binding posts IEEE 488.
525B Users Manual Table 1-1. Summary of Input and Output Functions Function Input Output dc V None 0 V to 100 V dc mA None 0 to 100 mA Resistance 0 to 4000 Ω (4-wire) 5 to 4000 Ω (2-wire) Thermocouple Yes Yes RTD Yes Yes Pressure Yes No Standard Equipment The items listed below are included with your Calibrator. If the Calibrator is damaged or something is missing, contact the place of purchase immediately.
Getting Started Safety Information 1 A Warning statement identifies hazardous conditions and actions that could cause bodily harm or death. A Caution statement identifies conditions and actions that could damage the Calibrator or the equipment under test. International symbols used on the Calibrator and in this manual are explained in Table 1-2.
525B Users Manual Table 1-2. Symbols Used on the Calibrator 1-4 AC (Alternating Current) Chassis protective ground Important Information. See manual. Hazardous voltage. Risk of electric shock DC (Direct Current) Pressure Earth ground Resistance Conforms to European Union directives Canadian Standards Association, NRTL International ON/OFF symbol.
Getting Started Getting Acquainted with the Calibrator 1 Getting Acquainted with the Calibrator Input and Output Terminals Figure 1-1 shows the Calibrator input and output terminals and explains their use.
525B Users Manual Using the Keys Figure 1-2 shows the Calibrator pushbuttons and Table 1-3 explains their use. Other function keys are shown in Figure 1-3 and described in Table 1-4. 2 3 4 5 1 STBY OPR 6 TYPE UNITS VOLTS mA TC RTD OUTPUT INPUT ZERO 7 8 9 SETUP CJC C/ F 4 5 6 SET RECALL AUTOSET 1 2 3 RNG LOCK LOCAL EXP / 0 • 7 SHIFT 8 ENTER CE 9 10 fcn09f.eps Figure 1-2.
Getting Started Getting Acquainted with the Calibrator 1 Table 1-3. Pushbutton Usage No Name Cycles the Calibrator through Standby and Operate modes. Toggles between DC voltage and DC current modes. Toggles between the current thermocouple and current RTD. Selects the pressure measurement mode. Selects a thermocouple or RTD type. For pressure measurement, this is used to select the pressure conversion units.
525B Users Manual 6 STBY OPR 5 4 3 2 7 TYPE UNITS VOLTS mA TC RTD OUTPUT INPUT ZERO 7 8 9 SETUP CJC C/ F 4 5 6 SET RECALL AUTOSET 1 2 3 RNG LOCK LOCAL EXP / 0 • 12 11 SHIFT 8 9 ENTER 1 10 fcn11f.eps Figure 1-3. Calibrator Function Keys Table 1-4. Function Keys No Name RNG LOCK SET Description Activates/deactivates the autorange feature of the Calibrator in Voltage source modes. Used to program a setpoint step for any output mode.
Getting Started Getting Acquainted with the Calibrator 1 Table 1-4. Function Keys (cont) No Name SETUP Description Press to advance through the LCD Backlight, Interface, and Address menus. • Use and to adjust LCD backlight when the LCD menu is displayed. • Use and to toggle between Serial and GPIB interface when the Interface menu is displayed. • Use and to scroll from Address:1 to Address 30 when the address menu is displayed. OUTPUT Selects Output mode.
525B Users Manual Table 1-4. Function Keys (cont) No Name RECALL LOCAL Description Used to recall a programmed set point. Press . RECALL SPT # appears on the display. Enter the number of the output setpoint that you want to use. The output will then be programmed to the setpoint you entered. Used to regain local control of the Calibrator. If you set the Calibrator to a remote state using the remote commands, all the front panel keys are locked out except the Local key.
Getting Started Getting Acquainted with the Calibrator 1 Rear Panel View Figure 1-4 shows the features on the rear panel of the Calibrator and explains their use. NO INTERNAL USER SERVICEABLE PARTS REFER SERVICE TO QUALIFIED SERVICE PERSONNEL FLUKE CORPORATION MADE IN USA REPLACE ONLY WITH A 250V FUSE OF INDICATED RATING? www.fluke.com C 1 WARNING: FOR FIRE PROTECTION PATENTS PENDING FUSE MAINS SUPPLY US 120V : 90V - 132V 240V : 198V - 264V 5x20mm0.125A 250V 5x20mm0.
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Chapter 2 Using Output Mode Using Output Mode In Output mode, the Calibrator generates calibrated signals for testing and calibrating process instruments. In Output mode, the Calibrator: • supplies voltage, current, and resistance • simulates the output of RTD and TC temperature sensors Note The OVER RANGE message displays if you enter an invalid output using the keypad. If you enter an out-of-range value, the Calibrator reverts to the last known good value. You do not need to press .
525B Users Manual Simulating Thermocouple Temperature Connect the Calibrator TC input/output to the unit under test (UUT) with thermocouple wire and the appropriate thermocouple mini-connector. Supported TC types are listed in Chapter 7. Figure 2-1 shows this connection. To simulate temperature using a thermocouple (TC): 1. Attach the thermocouple extension wire as shown in Figure 2-1. One pin is wider than the other. Do not try to force a miniplug in the wrong polarization. 2.
Using Output Mode Using Output Mode 2 Simulating Temperature Using Resistance Temperature Detectors (RTDs) RTDs have a characteristic resistance at specific temperatures. The simulated output, then, is a resistance value based on the selected temperature and type of RTD being simulated. To simulate temperature using a resistance temperature detector: 1. Connect the Calibrator to the unit under test (UUT) as shown in Figure 2-2. 2. Press until RTD is selected. 3.
525B Users Manual Simulating Custom RTD Coefficients The USR_DEF RTD type allows the Calibrator to simulate a custom curve-fit RTD. To enter the coefficients for a custom RTD: 1. Press to select RTD mode. 2. Press until you get the USR_DEF display. 3. Press to enter custom RTD information. RTD CUSTOM (1-5) appears on the Calibrator display. You can store up to five custom RTD definitions on the Calibrator. 4. Press a number key to specify the RTD you want to define (1-5).
Using Output Mode Using Output Mode 2 Default RTD Coefficients The USR_DEF function of the calibrator uses the Calendar-Van Dusen equation for outputting and measuring custom RTDs. The C coefficient is only used for the subrange –260 to 0 degrees Celsius. Only the A and B coefficients are needed for the subrange 0 to 630 degrees. The R0 is the resistance of the probe at 0 degrees Celsius. All of the USR_DEF will be set to PT385 as shown in Table 2-1. Table 2-1.
525B Users Manual Entering Custom Standard Platinum Resistance Thermometer (SPRT) Coefficients To enter coefficients for a custom SPRT: 1. Press to enter RTD mode. 2. Press until you get the RTD SPRT display and press . 3. Enter the MIN TEMP and press . 4. Enter the MAX TEMP and press . 5. Enter the nominal resistance (R0) and press . 6. Enter the temperature coefficients and press . Press to enter a positive or negative exponent for the coefficient.
Using Output Mode Using Output Mode 2 Output DC Voltage The Calibrator is a fully programmable precision source of DC voltage from 0 V to 100 V. The Calibrator can only output positive (+) values. To output DC voltage: 1. Connect the Calibrator to the UUT as shown in Figure 2-3. 2. Press for V out display. 3. Use the numeric keypad to enter the desired output value and press . You can also adjust the output value by pressing . Press to select a different digit to modify. 4.
525B Users Manual Output Resistance To output resistance: 1. Connect the Calibrator to the UUT as shown in Figure 2-4. 2. Press until RTD mode is selected. 3. If necessary, press for RTD OUT mode. 4. Press to select the appropriate ohms output range (400 or 4000 ohms). 5. Use the numeric keypad to enter the desired output value and press . You can also adjust the output value by pressing . Press to select a different digit to modify. 6. Press to activate output.
Using Output Mode Output Current 2 Output Current The Calibrator is a fully programmable precision source of DC current from 0 mA to 100 mA. The Calibrator can only output positive (+) values. To output current: 1. Connect the Calibrator to the UUT as shown in Figure 2-5. 2. If necessary, press to select mA. 3. Use the numeric keypad to enter the desired output value and press . You can also adjust the output value by pressing . Press to select a different digit to edit. 4.
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Chapter 3 Using Input Mode Using Input Mode In Input mode, the Calibrator measures resistance, and temperature from RTD and thermocouple sensors and displays pressure measurements from Fluke 700 and 525A-P series pressure modules. Note The figures in this chapter show how to connect to a Fluke 725 Multifunction Process Calibrator. For other instruments, refer to their users manual for connection instructions. Measuring Resistance The Calibrator will only measure resistance using a 4-wire system.
525B Users Manual 725 MULTIFUNCTION CALIBRATOR mA VOLTS RTD 100mA MAX V mA ZERO LOOP HI HI LO LO STBY OPR OUTPUT MEAS SOURCE STORE SETUP RECALL V mA TC Hz RTD 100V MAX °C °F 100% 4W RTD 25% HI 25% 0% INPUT 20V PK MAX SENSE LO VOLTS mA TC RTD OUTPUT INPUT TYPE UNITS TC INPUT/OUTPUT 20V PK MAX ZERO 7 8 9 SETUP CJC C/ F 4 5 6 SET RECALL AUTOSET 1 2 3 RNG LOCK LOCAL EXP / 0 • SHIFT ENTER CE 20V PK MAX fcn04f.eps Figure 3-1.
Using Input Mode Using Input Mode 3 To measure temperature using a thermocouple: 1. Attach the thermocouple leads to the TC input/output connector as shown in Figure 3-2. One pin is wider than the other. Do not attempt to force the plug in the wrong polarization. Note If the Calibrator and the TC plug are at different temperatures, wait three minutes or more for the connector temperature to stabilize after you plug the miniplug into the connector. 2. Press to select TC mode. 3.
525B Users Manual Thermocouple Zero Calibration To obtain the optimum measurement accuracy, you must perform a zero calibration when operating the Calibrator outside of the ambient temperature range of 18 ºC to 28 ºC. The zero calibration must be performed with the Calibrator thermally stable at the ambient temperature of operation. To perform a thermocouple zero calibration: 1. Insert the supplied Thermocouple Shorting Jumper in the TC input/output connector. One pin is wider than the other. 2.
Using Input Mode Using Input Mode 3 Measuring Temperature Using Resistance Temperature Detectors (RTDs) You must use a 4-wire connection to achieve the Calibrator accuracy specifications. To measure the RTD output from an instrument: 1. Connect the Calibrator to the instrument you want to measure as shown in Figure 3-3. 2. Press to select RTD mode. 3. If necessary, press to put the Calibrator in RTD IN mode. 4. Press to select the desired RTD type.
525B Users Manual 4. Press to select the desired RTD type. You can toggle between ºC and ºF temperature units by pressing . mA VOLTS RTD 100mA MAX HI HI LO LO STBY OPR OUTPUT 100V MAX 20V PK MAX 4W RTD HI INPUT 20V PK MAX SENSE LO VOLTS mA TC RTD OUTPUT INPUT TYPE UNITS TC INPUT/OUTPUT ZERO 7 8 9 SETUP CJC C/ F 4 5 6 SET RECALL AUTOSET 1 2 3 RNG LOCK LOCAL EXP / 0 • SHIFT ENTER CE 20V PK MAX fcn05f.wmf Figure 3-4.
Using Input Mode Using Input Mode 3 Entering and Using Custom RTDs The USR_DEF RTD type allows the Calibrator to simulate a custom curve-fit RTD. To enter the coefficients for custom RTDs: 1. Press to select RTD mode. 2. Press until you get the USR_DEF display. 3. Press to enter custom RTD information. RTD CUSTOM (1-5) appears on the Calibrator display. You can store up to five custom RTD definitions on the Calibrator. 4. Press a number key to specify the RTD you want to define (1-5). 5.
525B Users Manual Default RTD Coefficients The USR_DEF function of the calibrator uses the Calendar-Van Dusen equation for outputting and measuring custom RTDs. The C coefficient is only used for the subrange –260 to 0 degrees Celsius. Only the A and B coefficients are needed for the subrange 0 to 630 degrees. The R0 is the resistance of the probe at 0 degrees Celsius. All of the USR_DEF will be set to PT385 as shown in Table 3-1. Table 3-1.
Using Input Mode Using Input Mode 3 Entering Custom SPRT Coefficients To enter coefficients for a custom SPRT: 1. Press to enter RTD mode. 2. If necessary, press for RTD IN mode. 3. Press until you get the RTD IN SPRT display and press . 4. Enter the MIN TEMP and press . 5. Enter the MAX TEMP and press . 6. Enter the nominal resistance (R0) and press . 7. Enter the temperature coefficients and press . Press to enter a positive or negative exponent for the coefficient.
525B Users Manual Measuring Pressure Many ranges and types of pressure modules are available from Fluke. See “Accessories” in Chapter 6 of this manual for a complete list of supported pressure modules. Before you use a pressure module, read its instruction sheet. Pressure modules vary in use, media, and accuracy. To measure pressure, attach the appropriate pressure module for the process pressure to be tested as shown in Figure 3-5. To measure pressure: 1.
Chapter 4 Remote Operation Introduction This chapter describes methods for operating the Calibrator by remote control. Remote control can be interactive, with the user controlling each step from a terminal, or under the control of a computer program running the Calibrator in an automated system. The Calibrator rear panel has two ports for remote operations: • RS-232 serial port • IEEE-488 parallel port (General Purpose Interface Bus or GPIB port) RS-232 The serial port connects the PC and Calibrator.
525B Users Manual Setting up the RS-232 Port for Remote Control The Calibrator is fully programmable over an RS-232 link with a PC. You can enter individual commands from a terminal, write your own programs using, for example, a Windows®-based language such as Visual Basic, or run optional Windows®-based Fluke software such as MET/CAL.
Remote Operation Setting up the RS-232 Port for Remote Control 4 Complete the following procedure to test RS-232 port operation using the Windows® HyperTerminal application (or equivalent). To test port operation: 1. Select Start->Programs->Accessories->Hyperterminal->Hyper Terminal. 2. Enter 525B for Name:, and select OK. 3. Select PC serial port which 525B is connected to (from drop-down list), for Connect using: and select OK 4.
525B Users Manual SERIAL FROM HOST Port COM Port 525B Calibrator UUT Controller System for a UUT without a remote port. RS-232 Port COM Port SERIAL FROM HOST Port COM Port UUT 525B Calibrator Controller System for a UUT with an RS-232 port (via PC). fcn15f.eps Figure 4-2.
Remote Operation RS-232 Interface Overview 4 RS-232 Interface Overview The Calibrator RS-232 port is designed in accordance with EIA (Electronic Industries Association) standard RS-232-C. RS-232 is a serial binary data interchange operating at 9600 baud and distances up to 50 feet. The Calibrator rear panel serial port is configured as DTE (Data Terminal Equipment). For detailed information, see the EIA standard RS-232-C. A summary of RS-232 terms, interface lines and mnemonics are shown in Table 4-1.
525B Users Manual IEEE-488 Port IEEE-488 Port 525B Calibrator UUT Controller System for a UUT without a remote port. UUT 525B Calibrator Controller System for a UUT with an IEEE-488 remote port. RS-232 Port COM Port UUT 525B Calibrator Controller System for a UUT with an RS-232 remote port. fcn13f.eps Figure 4-3.
Remote Operation Setting up the IEEE-488 Port for Remote Control 4 IEEE-488 Port Setup Procedure Complete the following procedure to set up the Calibrator for remote operations using the IEEE-488 remote control port. The purpose is to select GPIB as the interface and to select the GPIB address for the interface. See Figure 4-4 for typical connections. To set up the IEEE-488 port: 1. Turn the Calibrator power on and wait until the initialization procedure completes.
525B Users Manual To test the IEE-488 port: 1. Open the MET/CAL Editor application. 2. Select File->New or press Ctrl+N. 3. Enter IEEE [@4]*IDN?[I$]. If you did not select address 4 in step 6 above, substitute the address you entered for the 4. 4. Select Edit->Name Procedure or press Ctrl+I and enter Test 525B GPIB. 5. Select Compile->Next Error or press F9. 6. Select Test Run->Restart or press F2. 7. Check the S-Reg check box. 8. Select Run. 9.
Remote Operation Changing Between Remote and Local Operation 4 Front panel operation is disabled except for the LOCAL (0 key). Pressing 0, using RS-232 to send the command LOCAL, or IEEE-488 to send the GTL (Go To Local) message returns the Calibrator to the local state. Remote with Lockout State When the Calibrator is placed in lockout, either via RS-232 LOCKOUT command, or via the IEEE-488 message LLO, the 525B front panel controls are totally locked out. The top line of the display changes to: REM.
5B Users Manual IEEE-488 Interface Overview The IEEE-488 parallel interface sends commands as data and receives measurements and messages as data. The maximum data exchange rate is 1 Mbyte, with a maximum distance of 20 meters for the sum length of the connecting cables. A single cable should not exceed 4 meters in length. Some commands are reserved for RS-232 serial operation because these functions must be implemented as IEEE messages per the IEEE Standards.
Remote Operation IEEE-488 Interface Overview Type M - Multiline U - Uniline Class AC - Addressed Command AD - Address (Talk or listen) UC - Universal Command ST - Status DD - Device Dependent HS - Handshake SE - Secondary Other B1, B2, etc. - Information Bits Blanks - Doesn’t Care condition Logic Zero = 0 = False Logic One = 1 = True 4 Table 4-4.
525B Users Manual Table 4-4 IEEE-488 Remote Message Coding (continued) M N E M 4-12 MESSAGE NAME HANDSHAKE DATA BUS MESSAGE DESCRIPTION T Y P E C L A S S D D D D D D D D I I I I I I I I O O O O O O O O 8 7 6 5 4 3 2 1 A E S I T O R F N I Q C Parallel Poll Configure M AC 0 0 0 0 Parallel Poll Enable M SE 1 1 0 B4 B3 B2 B1 1 1 1 1 B4 B3 B2 B1 1 Parallel Poll Disable M SE Parallel Poll Response 1 U ST PPR2 Parallel Poll Response 2 U ST PPR3 Parallel Poll Response 3 U ST P
Remote Operation Using Commands 4 Using Commands Communications between the controller and the Calibrator consists of commands, queries, and interface messages. Although the commands are based on the 488.2 standard, they can be used on either the IEEE-488 or RS-232 interface, except for a few specialized RS-232 commands described in “Commands for RS-232 Only.” For more information on command structures, see the IEEE 488.2 standard.
525B Users Manual Query Commands Query commands request information, which is returned as the command executes, or placed in a buffer until requested. An example of a query, which always ends with a question mark, is, RANGE? returning the Calibrator dc voltage output range. Interface Messages (IEEE-488) Interface messages manage traffic on the IEEE-488 interface bus. Device addressing and clearing, data handshaking, and commands to place status bytes on the bus are all directed by interface messages.
Remote Operation Using Commands 4 Table 4-5. IEEE-488 Interface Messages (Received) Mnemonic Name Function ATN Attention A control line that, when asserted, notifies all instruments on the bus that the next data bytes are an interface message. When ATN is low, the next data bytes are interpreted as device-dependent or common commands addressed to a specific instrument. DAC Data Accepted Sets the handshake signal line NDAC low. DAV Data Valid Asserts the handshake signal line DAV.
525B Users Manual Table 4-6. IEEE-488 Interface Messages (Sent) Mnemonic Name Function END End A message that occurs when the 525B asserts the EOI control line. The 525B asserts EOI while it transmits the ASCII character LF for its termination sequence or terminator. DAC Data Accepted Set the handshake signal line NDAC low. DAV Data Valid Asserts the handshake signal line DAV. RFD Ready for Data Sets the handshake line NRFD low.
Remote Operation Using Commands 4 You can use the command *WAI to wait until the overlapped command has completed execution before executing the next command. For example, OUT 1 V ; *WAI You can also use the status commands *OPC and *OPC? to detect completion of overlapped commands. (See “Checking 525B Status.”) Sequential Commands Commands that execute immediately are called sequential commands. In Chapter 5, the command graphic x Sequential shows a check for sequential commands.
525B Users Manual Command Syntax The following syntax rules apply to all the remote commands. Information about syntax of response messages is also given. Parameter Syntax Rules Table 4-8 lists the units accepted in command parameters and used in responses. All commands and units may be entered in upper or lower case. Table 4-8.
Remote Operation Using Commands 4 General Rules The general rules for parameter usage is as follows: 1. Numeric parameters may have up 15 significant digits and their exponents can be in the range ± -1.0E ± -20. 2. Including too many or too few parameters causes a command error. 3. Null parameters cause an error, e.g., the adjacent commas in OUT 1V, ,;OPER. 4. Expressions, for example 4+2*13, are not allowed as parameters.
525B Users Manual IEEE-488 Interface The Calibrator sends the ASCII character Carriage Return with the EOI control line held high as the terminator for response messages. The calibrator recognizes the following as terminators when encountered in incoming data: • ASCII CR character • Any ASCII character sent with the EOI control line asserted RS-232 Interface The Calibrator returns a Carriage Return (CR) character with each response.
Remote Operation Checking 525B Status 4 Table 4-10. Response Data Types Data Type Integer Description Integers for some controllers or computers are decimal numbers in the range -32768 to 32768. Responses in this range are labeled Integer. Floating Character Response Data (CRD) Indefinite ASCII (IAD) Example: *ESE 123; *ESE? Returns: 123 Numbers that may have up to 15 significant figures plus an exponent that may range from ±E20. Example: OUT? Returns: 1.
525B Users Manual PC O PO N 0 C M EX E D E D Q E Y 0 E Each status register and queue has a summary bit in the Serial Poll Status Byte. Enable registers are used to mask various bits in the status registers and generate summary bits in the Serial Poll Status Byte. For IEEE-488 interface operation, the Service Request Enable Register is used to assert the SRQ control line on detection of any status condition or conditions the programmer chooses.
Remote Operation Checking 525B Status 4 Serial Poll Status Byte (STB) The Calibrator sends the serial poll status byte (STB) when it responds to a serial poll. This byte is cleared (set to 0) when the power is turned on. The STB byte is defined as shown in Figure 4-6. Refer to the *STB? Command for RS-232 interface operation in Chapter 5 for more information. 7 0 6 RQS MSS 5 4 3 2 1 0 ESB MAV EAV 0 0 0 RQS Requesting service.
525B Users Manual Service Request Enable Register (SRE) The Service Request Enable Register (SRE) enables or masks the bits of the Serial Poll Status Byte. The SRE is cleared at power up. Refer to Figure 4-6 for the bit functions. Programming the STB and SRE By resetting (to 0) the bits in the SRE, you can mask (disable) associated bits in the serial poll status byte. Bits set to 1 enable the associated bit in the serial poll status byte.
Remote Operation Checking 525B Status 4 Bit Assignments for the ESR and ESE The bits in the Event Status Register (ESR) and Event Status Enable register (ESE) are assigned as shown in Figure 4-7. 15 14 13 12 11 10 9 8 0 0 0 0 0 0 0 0 7 6 5 4 3 2 1 0 PON 0 CME EXE DDE QYE 0 OPC PON Power on. This bit is set to 1 if line power has been turned off and on since the last time the ESR was read. CME Command error.
525B Users Manual Programming the ESR and ESE To read the contents of the ESR, send the remote command, *ESR?. The ESR is cleared (set to 0) every time it is read. To read the contents of the ESE, send the remote command, *ESE?. The ESE is not cleared when it is read. When you read either register, the Calibrator responds by sending a decimal number that when converted to binary represents bits 0 through 15.
Remote Operation Checking 525B Status 4 IEEE-488 The Calibrator treats the EOI IEEE-488 control line as a separate data byte and inserts it into the input buffer if it is encountered as part of a message terminator. Input buffer operation is transparent to the program running on the controller. If the controller sends commands faster than the Calibrator can process them, the input buffer fills to capacity.
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Chapter 5 Remote Commands Introduction Remote commands duplicate activities that can be initiated from the front panel in local operation. Following the summary table is a complete alphabetical listing of all commands complete with protocol details. Separate headings in the alphabetical listing provide the parameters and responses, plus an example for each command. For information on using commands, see Chapter 4, “Remote Operation.
525B Users Manual Common Commands (continued) Command Description *OPT? Returns a list of the installed hardware and software options. *RST Resets the state of the instrument to the power-up state. This command holds off execution of subsequent commands until it is complete. (Overlapped command.) *SRE Loads a byte into the Service Request Enable register (SRE). *SRE? Returns the byte from the Service Request Enable register. *STB? Returns the status byte.
Remote Commands Command Summary by Function 5 Output Commands Command Description FUNC? Returns the present output, measurement, or calibration function. OPER Activates the Calibrator output if it is in standby. OPER? Returns the operate/standby setting. OUT Sets the output of the Calibrator. OUT? Returns the output amplitude of the Calibrator. RANGE? Returns the present output range. (Voltage only). RANGELCK Locks the present output range (Voltage only).
525B Users Manual Status Commands Command Description FAULT? Returns the latest error code from the error queue, then removes that error code from the queue. Error Code Listing 5-4 Error Number Message Class 1 DDE Error queue overflow. 100 EXE OPER or STBY was received when the 525B is in Measure mode or TC Source mode. 101 CME A non-numeric entry was received in a field that should contain a numeric entry. 102 EXE The numeric field exceeds 10 characters.
Remote Commands Remote Command Listing 5 Error Code Listing (continued) Error Number Message Class Description 118 CME An invalid parameter was received. 120 EXE The serial input buffer overflowed. 121 EXE The command string buffer overflowed. 122 QYE The serial output buffer overflowed. 123 DDE The output overloaded. 124 DDE 525B is out of tolerance. This error is set after a failed initialization or a failed *TST?. 125 DDE 525B has a ADC failure.
525B Users Manual *CLS x IEEE-488 x RS-232 x Sequential x Overlapped (Clear Status command) Clears the ESR, the error queue, and the RQS bit in the status byte. This command terminates pending operation complete commands (*OPC or *OPC?). Parameter: (None) Example: *CLS Clear the ESR, the error queue, and the RQS bit in the status byte. *ESE x IEEE-488 x RS-232 x Sequential x Overlapped (Event Status Enable command) Loads a byte into the Event Status Enable (ESE) register.
Remote Commands Remote Command Listing x *ESR? IEEE-488 x x RS-232 x Sequential 5 Overlapped (Event Status Register query) Returns the contents of the Event Status Register (ESR) and clears the register. (See Event Status Register (ESR)” in Chapter 4.) Response: (decimal equivalent of the ESR byte, 0 to 255) Example: *ESR? returns 189 Returns decimal 189 (binary 00111101) when bits 5 (CME), 4 (EXE), 3 (DDE), 2 (QYE) and 0 (OPC) are enabled.
525B Users Manual Responses: (Indefinite ASCII) A message containing four fields separated by commas as follows: 1. 2. 3. 4. Example: Manufacturer Model number Serial number (always 0) Firmware revision levels for the main, front panel, and inguard CPUs. *IDN? returns FLUKE,525B,0,1.2 Returns Fluke manufacturer, model 525B, serial number 0, firmware version 1.2.
Remote Commands Remote Command Listing 5 Set bit 0 of the Event Status Register to 1 when all pending device operations are done. x *OPC? IEEE-488 x RS-232 x Sequential x Overlapped (Operations Complete query) Returns a 1 after all pending operations are complete. This command causes program execution to pause until operations are complete. (See *WAI.) Response: 1 (all operations are complete) Example: *OPC? returns 1 Returns 1 when all pending operations are complete.
525B Users Manual OUT x x IEEE-488 RS-232 x Sequential x Overlapped (Output command) Sets the output of the Calibrator and establishes a new reference point for the error mode. To source or measure a temperature, select the desired sensor and sensor parameters first. (See the TSENS_TYPE, RTD_TYPE, and TC_TYPE commands.) Use multipliers, k, m, u with the OUT command, as desired.
Remote Commands Remote Command Listing PRES? x IEEE-488 x RS-232 x Sequential x 5 Overlapped (Pressure Module query) Queries the attached pressure module for its model and serial number. Responses: (Indefinite ASCII) A message containing four fields separated by commas as follows: 1. Manufacturer 2. Model number 3. Serial number 4.
525B Users Manual x PRES_UNIT? x IEEE-488 x RS-232 x Sequential Overlapped (Pressure Units query) Returns the pressure display units.
Remote Commands Remote Command Listing RANGELCK? x IEEE-488 x RS-232 x Sequential x 5 Overlapped (Range command) Returns the RANGELOCK state 1 for ON or 0 for OFF. Parameter: (None) REMOTE x IEEE-488 x RS-232 x Sequential x Overlapped (Remote command) Places the Calibrator into the remote state. This command duplicates the IEEE-488 REN (Remote Enable) message. When the Calibrator is in the remote state, and not locked out, only the LOCAL key is active.
525B Users Manual RTD_MEAS x IEEE-488 x RS-232 x Sequential x Overlapped (RTD Measure command) Selects the measure RTD mode. Parameters: CEL FAR (Celsius) (optional) (Fahrenheit) (optional) Example: RTD_MEAS CEL Measure the RTD temperature that is attached to the Calibrator RTD terminals, in Celsius. RTD_TYPE x IEEE-488 x RS-232 x Sequential x Overlapped (Resistance Temperature Detector Type command) Sets the Resistance Temperature Detector (RTD) sensor type.
Remote Commands Remote Command Listing RTD_TYPE? x IEEE-488 x RS-232 x Sequential x 5 Overlapped (Resistance Temperature Detector Type query) Returns the Resistance Temperature Detector (RTD) type used for RTD temperature simulations. (100-ohm RTD, curve α=0.00385 ohms/ohm/°C) (200-ohm RTD, curve α=0.00385 ohms/ohm/°C) (500-ohm RTD, curve α=0.00385 ohms/ohm/°C) (1000-ohm RTD, curve α=0.0038 ohms/ohm/°C) (100-ohm RTD, curve α=0.003926 ohms/ohm/°C) (100-ohm RTD, curve α=0.
525B Users Manual x *SRE? IEEE-488 x RS-232 x Sequential x Overlapped (Service Request Enable query) Returns the byte in the Service Request Enable (SRE). Response: (the decimal equivalent of the SRE byte, 0 to 191) Example: *SRE? returns 48 Returns 48 when bits 4 (MAV), and 5 (ESR) are enabled. x *STB? IEEE-488 x RS-232 x Sequential x Overlapped (Status Byte Register query) Returns the byte for the Status Byte Register. See “Status Byte Register (STB)” in Chapter 4.
Remote Commands Remote Command Listing TC_REF x IEEE-488 x RS-232 x Sequential x 5 Overlapped (Thermocouple Reference command) Sets whether the internal temperature sensor (INT) or an external reference value (EXT) is used for Thermocouple (TC) outputs and measurements. The Calibrator retains the TC reference setting until power off or reset. Parameters: INT EXT Example: TC_REF EXT Set the thermocouple reference to external.
525B Users Manual (1 mV/°C linear output) Z Example: TC_TYPE J Set the thermocouple type for simulating a temperature output to a J-type thermocouple. x TC_TYPE? IEEE-488 x RS-232 x Sequential x Overlapped (Thermocouple Type query) Returns the Thermocouple (TC) temperature sensor type. When the thermocouple type is changed while simulating a temperature output, the temperature is changed to 0 °C.
Remote Commands Remote Command Listing TSENS_TYPE? x IEEE-488 x RS-232 x Sequential x 5 Overlapped (Temperature Sensor Type query) Returns the temperature sensor type thermocouple (TC) or Resistance Temperature Detector (RTD) for temperature measurements. Responses: TC RTD (Thermocouple) (Resistance Temperature Detector) Example: TSENS_TYPE? returns TC Returns TC when the temperature sensor type is a thermocouple.
525B Users Manual *WAI x x IEEE-488 x RS-232 Sequential x Overlapped (Wait-to-Continue command) Prevents further remote commands from being executed until all previous remote commands have been executed. For example, if you send an OUT command, you can cause the Calibrator to wait until the output has settled before continuing on to the next command if you follow OUT with a *WAI command.
Chapter 6 Maintaining the Calibrator Maintenance Cleaning the Calibrator Warning To avoid personal injury or damage to the Calibrator, use only the specified replacement parts and do not allow water into the case. Caution To avoid damaging the case, do not use solvents or abrasive cleaners. Clean the Calibrator and pressure modules with a soft cloth dampened with water or mild soap and water.
525B Users Manual To check or replace a fuse: 1. Disconnect line power. 2. Using the blade of a standard screwdriver, pry the tab at the base of the line fuse compartment. The compartment cover will pop part way out. 3. Remove the compartment cover. The fuses come out with the compartment cover and can easily be checked or replaced. 4. To reinstall the fuse, push the compartment cover back into the compartment until the tab locks in place.
Maintaining the Calibrator Maintenance 6 6. Verify you are using the appropriate fuse for the selected line voltage (See Table 6-1) and reinstall the fuse compartment by pushing it in until the tab locks in place. Line voltage indicator Changing line fuse 120V 120 240V Line fuse compartment 0V (SB) Rotate to change line voltage indicator Changing line voltage ajr12f.eps Figure 6-1.
525B Users Manual Performance Tests Required Equipment List Table 6-2 lists all the required equipment for performance testing. Table 6-2.
Maintaining the Calibrator Performance Tests 6 Testing DC Voltage The DC voltage amplitude accuracy test verifies the accuracy of DC voltage at the 525B calibrator front panel Volts Source output. Verify the measurements listed in Table 6-3. Table 6-3. Measuring DC Voltage Nominal Value (V) Range 100 mV 1.0 V 10.0 V 100.0 V Measured Value Deviation % 90 Day Spec. (V) One Year Spec. (V) 0 3.00E-06 3.00E-06 0.025 3.63E-06 3.75E-06 0.075 4.88E-06 5.25E-06 0.1 5.50E-06 6.00E-06 0 1.
525B Users Manual Testing DC Current Use the 8508A and the precision shunt to measure the 525B output as shown in Figure 6-2. Take the Voltage reading from the 8508A and divide it by the 742A-1 actual value to determine the current output. Verify the measurements listed in Table 6-4.
Maintaining the Calibrator Performance Tests 6 Testing Thermocouple Output For this test, the TC mV specifications will be used. When this test is combined with the CJC test all functions of the TC output will have been checked. Typically, the cable needed to connect the 525B to the 8508A will need to be fabricated. The TC Mini-Connector will need Copper-Copper (White). Using Copper wire, connect the Mini-Connector to standard Banana Jacks. See Figure 6-3 for a connection diagram.
525B Users Manual Testing CJC (Cold Junction Compensation) Connect a Type-J thermocouple to the TC terminals on the 525B. Immerse the thermocouple and a precision thermometer in a mineral oil lag bath. The test setup is shown in Figure 6-4. Verify that the readings of the 525B and the precision thermometer are within the Type-J specifications: 90-day specification is 0.14 °C 1-year specification is 0.
Maintaining the Calibrator Performance Tests 6 Testing Thermocouple Input Set the 525B to TC input by pressing . All 525B conditions will be the same as the Thermocouple Output test, CJC off, mV/°C mode. Connect the 525B to the 5520A as shown in Figure 6-5. Set the 5520A to the mV values listed in Table 6-5.
525B Users Manual Testing Ohms Output Use the precision DMM to measure the resistance output as shown in Figure 6-6 and Table 6-6. Note The 8508A must be in the “loI” (low current mode) when measuring 5 ohms in the 4 K ohm range or an overload will occur.
Maintaining the Calibrator Performance Tests 6 Testing Ohms Input Before measuring ohms input, you need to “characterize” the ohms output of a 5520A. To achieve the needed accuracy, the 8508A will be used as a transfer standard and the 742A will be used as the reference standard. To find the true value of the 5520A output, use the ratio input function of the 8508A located on the front and rear panels.
525B Users Manual Use the 742A-1K for the 400 ohm range. Use the 742A-10K for the 4K ohm range. For more information on the correct usage of ratio mode, refer to the 8508A Operators Manual. Use Table 6-7 to note the ratio indication on the 8508A. Use the formula (742A actual value/ratio indication * 100 = actual 5520A Actual Value column. Table 6-7. Ohms Ratio Table Range (Ω) 742A Value (Ω) Ratio 5520A Actual Value (Ω) 525B Reading Spec. 90-Day 1-Year Spec. (Ω) Spec. (Ω) 400 0 0.002 0.003 0.
Maintaining the Calibrator Performance Tests 6 525B 525B TEMPERATURE / PRESSURE CALIBRATOR mA VOLTS RTD 100mA MAX HI HI LO LO STBY OPR OUTPUT 100V MAX 4W RTD HI INPUT 20V PK MAX SENSE LO TYPE UNITS VOLTS mA TC RTD OUTPUT INPUT ZERO 7 8 9 SETUP CJC C/ F 4 5 6 SET RECALL AUTOSET 5520 4W Ohms Function TC INPUT/OUTPUT 20V PK MAX 1 2 3 RNG LOCK LOCAL EXP / 0 • SHIFT ENTER CE 20V PK MAX fcn27f.eps Figure 6-8.
525B Users Manual Service Center Calibration or Repair Calibration, repairs, or servicing not covered in this manual should be performed only by qualified service personnel. Verify that the Calibrator is being operated in accordance with the instructions in this manual. If the Calibrator is faulty, send a description of the failure with the Calibrator. Pressure modules do not need to accompany the Calibrator unless the module is faulty also.
Maintaining the Calibrator Replacement Parts 6 Replacement Parts Replacement parts are shown in Figure 6-9. Table 6-8 provides a description and part number of each replacement part. 9 2 24 7 3 23 22 4 12 21 16 25 15 26 20 19 18 5 13 14 8 17 1 11 10 6 fcn20f.eps Figure 6-9.
525B Users Manual Table 6-8. Replacement Parts Item Description 1 Decal, Front Panel 1601576 2 Fuse Drawer 1617918 3 Fuse, 0.25 A/250 V (fast for 120 V operation) 1645311 4 Fuse, 0.
Maintaining the Calibrator Accessories 6 Accessories For more information about these accessories and their prices, contact your Fluke representative. Y525 Rack Mount Kit The Y525 rack mount kit provides all the hardware needed to mount the 525B on an equipment rack. Instructions are provided in the kit. 5520A – 525A Test Lead Kit The optional 5520A – 525A test lead kit contains thermocouple extension wires, thermocouple adapter, binding post adapters, and test leads.
525B Users Manual Table 6-8 Fluke 700 Series Pressure Modules (continued) Fluke Model Number Range Type and Media Fluke-700PA4 0 to 15 psi absolute, wet Fluke-700PA5 0 to 30 psi absolute, wet Fluke-700PA6 0 to 100 psi absolute, wet Fluke-700PV3 0 to -5 psi vacuum, dry Fluke-700PV4 0 to -15 psi vacuum, dry Fluke-700PD2 ±1 psi dual range, dry Fluke-700PD3 ±5 psi dual range, dry Fluke-700PD4 ±15 psi dual range, dry Fluke-700PD5 -15 / +30 psi dual range, wet Fluke-700PD6 -15 / +10
Chapter 7 Specifications General Specifications Warm up time ........................................................ Twice the time since last warmed up, to a maximum of 30 minutes. Settling time ........................................................... Less than 5 seconds for all functions and ranges except as noted. Standard interface ................................................. RS-232, IEEE-488 (GPIB) Temperature performance Operating ............................................................
525B Users Manual Electrical Specifications DC Voltage Specifications, Output Ranges Absolute Uncertainty, tcal ± 5 °C ± (ppm of output + μV) [1] 90 days Stability Resolution Maximum [2] Burden 24 hours, ± 1 °C ± (ppm of output + μV) 1 year 0 to 100.000 mV 25 3 30 3 5+2 1 μV 10 mA 0 to 1.00000 V 25 10 30 10 4 + 10 10 μV 10 mA 0 to 10.0000 V 25 100 30 100 4 + 100 10 mA 0 to 100.000 V 25 1 mV 30 100 μV 1 mV -10 to 75.
Specifications Electrical Specifications 7 Resistance Specifications, Output Ranges [1] Absolute Uncertainty tcal ± 5°C, ± Ω 90 days 1 year [2] Resolution Allowable Current 5 to 400.00 Ω 0.012 0.015 0.001 Ω 1 to 3 mA 5 to 4.0000 kΩ 0.25 0.3 0.01 Ω 100 μA to 1 mA Notes: [1] Continuously variable from 0 to 4 kΩ. [2] For currents lower than shown, the floor adder increases by Floor(new) = Floor(old) x Imin/Iactual.
525B Users Manual Thermocouple Specification, Output and Input Range (°C) TC Type B C E J K L N R S T U Minimum 600 °C 800 °C 1000 °C 1550 °C 0 °C 150 °C 650 °C 1000 °C 1800 °C -270 °C -100 °C -25 °C 350 °C 650 °C -270 °C -100 °C -25 °C 120 °C 1000 °C -270 °C -100 °C -25 °C 120 °C 1000 °C -200 °C -100 °C 800 °C -270 °C -100 °C -25 °C 120 °C 410 °C -50 °C 250 °C 400 °C 1000 °C 0 °C 250 °C 1000 °C 1400 °C -270 °C -150 °C 0 °C 120 °C -200 °C 0 °C mV Note: [1] Does not include thermocouple wire e
Specifications Electrical Specifications 7 RTD and Thermistor Specification, Output Range (°C) RTD Type Pt 385, 100 Ω Pt 3926, 100 Ω Pt 3916, 100 Ω Pt 385, 200 Ω Pt 385, 500 Ω Pt 385, 1000 Ω Ni 120, 120 Ω Minimum Maximum -200 °C -80 °C 0 °C 100 °C 300 °C 400 °C 630 °C -200 °C -80 °C 0 °C 100 °C 300 °C 400 °C -200 °C -190 °C -80 °C 0 °C 100 °C 260 °C 300 °C 400 °C 600 °C -200 °C -80 °C 0 °C 100 °C 260 °C 300 °C 400 °C 600 °C -200 °C -80 °C 0 °C 100 °C 260 °C 300 °C 400 °C 600 °C -200 °C -80 °C 0
525B Users Manual RTD and Thermistor Specification, Output (cont.) Range (°C) RTD Type Cu 427, 10 Ω [2] YSI 400 Absolute Uncertainty [1] tcal ± 5 °C, ± (°C) 90 days 1 year Minimum Maximum -100 °C 260 °C 0.30 °C 0.38 °C 15 °C 50 °C 0.005 °C 0.007 °C Notes: [1] 2-wire output. [2] Based on MINCO Application Aid No. 18.
Specifications Electrical Specifications 7 RTD and Thermistor Specification, Input (cont.
525B Users Manual Pressure Measurement The Calibrator can accept either the Fluke 700 or 525A-P series pressure modules. Pressure modules plug directly into the front panel Lemo connector with the Calibrator firmware autodetecting the type and value of the module you are attaching. Range ...................................... Determined by pressure module Accuracy/Resolution.............. Determined by pressure module Units PSI........................................ pounds per square inch inH2O4°C .......
