MFC-CB™ MFC Control Box Operation and Maintenance Manual ©2001~2007 DH Instruments, a Fluke Company
MFC-CB™ Operation and Maintenance Manual © 2001~2007 DH Instruments, a Fluke Company All rights reserved. Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of DH Instruments, a Fluke Company 4765 East Beautiful Lane Phoenix AZ 85044-5318 USA.
TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS ................................................................................ I TABLES ................................................................................................... IV FIGURES ................................................................................................. IV ABOUT THIS MANUAL ............................................................................... V 1. INTRODUCTION .......................................
MFC-CB™ Operation and Maintenance Manual 3.2.5 3.2.6 3.2.7 3.2.8 3.2.9 3.3 [SETUP] ...................................................................................................................................................29 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.4 3.2.4.6 <6CLEAN> .......................................................................................................................................24 [DEV1/2] ............................................................................
TABLE OF CONTENTS 6. TROUBLESHOOTING .......................................................................... 85 6.1 OVERVIEW ..............................................................................................................................................85 7. APPENDIX .......................................................................................... 87 7.1 CALCULATIONS ................................................................................................................
MFC-CB™ Operation and Maintenance Manual TABLES Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. MFC-CB Delivery List ................................................................................................................ 7 Summary of MFC-CB Direct Function Key Operation............................................................. 15 Available Flow Units ......................
ABOUT THIS MANUAL ABOUT THIS MANUAL This manual provides the user with the basic information necessary to set up and operate an MFC-CB MFC Control Box. It also includes a great deal of additional information provided to help you optimize MFC-CB use and take full advantage of its many features and functions. Before using the manual, take a moment to familiarize yourself with the Table of Contents structure. All first time MFC-CB users should read Sections 1 and 2.
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1. INTRODUCTION 1. I NTRODUCTION 1.1 PRODUCT OVERVIEW MFC-CB is a two channel analog input/output device designed to set and read voltage and current signals from analog Mass Flow Controllers (MFC) and Mass Flow Meters (MFM). A DH Instruments MFC Switchbox may be connected to either channel allowing switching of the channel’s control between five permanently powered channels. As an option, (8) external 12 V drivers can also be included to excite peripheral equipment such as solenoid valves.
MFC-CB™ Operation and Maintenance Manual 1.2.2 ANALOG OUTPUT SPECIFICATIONS VOLTAGE OUTPUT Range 0 to 6 VDC Uncertainty ± 0.015 %FS Resolution 0.1 mVDC Output Impedance (max) 100 Ω per channel Load Impedance (min) 10 kΩ per channel Short Circuit Protection Yes (indefinite) CURRENT OUTPUT Range 4 to 20 mA Uncertainty ± 0.025 %FS Resolution 0.4 μA Maximum Load Short Circuit Protection 1.2.
1. INTRODUCTION 1.2.5 FRONT AND REAR PANELS 1.2.5.1 FRONT PANEL The front panel assembly provides a 2 x 20 vacuum fluorescent display, a membrane keypad for local user interface and a SOFT ON/OFF key. 1 3 4 2 1. Display 2. Multi-Function Keypad 3. Remote Communication Indicator 4. SOFT ON/OFF Key and Indicator Figure 1.
MFC-CB™ Operation and Maintenance Manual 1.2.5.2 REAR PANEL The rear panel assembly provides DEVICE1 and DEVICE2 analog input/output channels, a 12 V drivers connection, communications interfaces and the power connection module. 1. Electrical power connector (IEC60320) 2. Power ON/OFF switch 3. Connector for 12V DRIVERS 4. Connector for MFC Switchbox control 5. DEVICE1 electrical input/output connection 6. DEVICE2 electrical input/output connection 7.
1. INTRODUCTION 1.2.6 INTERNAL VIEW 1. Power entry module 2. Micro board 3. Main board (under power supply and micro board) 4. Display 5. Power supply Figure 3. MFC-CB Internal View 1.2.6.1 DISPLAY 2 x 20 vacuum fluorescent, alpha-numeric display mounted to front panel. 1.2.6.2 POWER SUPPLY MFC-CB has one 65 W switching power supply with three DC voltage outputs: • 5 VDC @ 7 Amp max. • +15 VDC @ 2.5 Amp max. • -15 VDC @ 2 Amp max.
MFC-CB™ Operation and Maintenance Manual 1.2.6.3 POWER ENTRY MODULE Includes ON/OFF switch, fuse (1 Amp @ 250 VAC) and AC filter. 1.2.6.4 MICRO BOARD The micro board supports a Motorola 68302 micro-controller, EPROM, EEPROM, 128k x 16 bit NVRAM, 8 Mbit flash memory; RS232 and IEEE-488.2 communications; keypad and display control. An I/O port controls other ports and devices within MFC-CB. 1.2.6.5 MAIN BOARD The main board is controlled by the micro board (see Section 1.2.6.4).
2. INSTALLATION 2. I NSTALLATION 2.1 UNPACKING AND INSPECTION 2.1.1 REMOVING FROM PACKAGING MFC-CB is delivered, along with its standard accessories, in a corrugated container with polyurethane inserts to hold it in place. Remove the MFC-CB and its accessories from the shipping container and remove each item from its protective plastic bag. 2.1.2 INSPECTING CONTENTS Check that all items are present and have no visible damage. An MFC-CB is delivered complete with: Table 1.
MFC-CB™ Operation and Maintenance Manual 2.2 SITE REQUIREMENTS Install MFC-CB on any stable surface at a convenient height. The front feet are extendible so that the unit can be inclined for easier viewing. MFC-CB can also be mounted in a standard 19-in. rack using the optional rack mount kit (P/N 401465). For additional information, contact your DHI Sales Representative.
2. INSTALLATION 2.4.2 CHECK/SET SECURITY LEVEL MFC-CB has a security system based on user levels. By default, the security system is set to “low”, which includes certain access restrictions, and there is no password required to change the security level. See Section 3.4.2 and Table 4 for information on the security level system. As part of the MFC-CB startup, set your desired security level and a password.
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3. OPERATION 3. O PERATION 3.1 GENERAL MANUAL OPERATION MFC-CB is designed to offer the optimum balance between simple, intuitive operation and the availability of a variety of functions with a high level of operator discretion. The local operator interface is through the front panel’s 2 x 20 character alpha-numeric display and a 4 x 4 multi-function keypad. 3.1.
MFC-CB™ Operation and Maintenance Manual 10. : Indication of what is being displayed on the bottom line of the display as set by the DISPLAY function (see Section 3.2.4). Possible indications include: • <→>: Current DISPLAY mode is DEV1&DEV2 (see Section 3.2.4.1) and the active device channel is DEV2. The arrow is on the first line if the active device channel is DEV1. • <Σ> and far right of bottom line is Dn + Dn: Section 3.2.4.2).
3. OPERATION Key press confirmation is provided by both tactile and audible feedback. A single beep confirms a valid entry. A descending two note tone signals an invalid entry. The audible entry feedback can be suppressed or modified (see Section 3.4.3.2). Pressing the [ENTER] key generally causes execution or forward movement in the menu tree. Pressing the [ESCAPE] key generally allows movement back in the menu tree and/or causes execution to cease or suspend without changes being implemented.
MFC-CB™ Operation and Maintenance Manual 3.1.2.3 SOFT [ON/OFF] KEY MFC-CB is equipped with a SOFT [ON/OFF] key and indicator LED on the bottom left hand corner of the front panel. The purpose of the SOFT ON/OFF key is to put MFC-CB into a dormant mode in which the display is turned OFF. When MFC-CB is SOFT OFF, power is still supplied to DEV1 and DEV2 and the MFC set points are maintained if the rear panel main power switch is on. When MFC-CB is ON, the ON/OFF indicator is ON continuously.
3. OPERATION Table 2. Summary of MFC-CB Direct Function Key Operation Direct Function Keys are active from the MAIN run screen See corresponding manual sections for full detail . SETUP 0 SPECIAL 1 DEV1/2 2 MFC 3 DRIVERS 5 POWER 6 DISPLAY 7 K 9 UNIT +/- ENTER SET MFC Í Menu of commonly used setup features including creating and editing MFC profiles, adjusting set point jog value and display resolution.
MFC-CB™ Operation and Maintenance Manual 3.2 DIRECT FUNCTION KEYS 3.2.1 [K] PURPOSE To specify a gas measurement conversion factor, K, to be applied to the active device channel when using and MFC or MFM calibrated with one gas to set and/or measure the flow of another gas. PRINCIPLE MFCs and MFMs respond differently to different gas species due the different specific heats of the gases and different behavior in the device.
3. OPERATION The value of the gas conversion factor can be edited as desired. Press [ENTER] to return to the MAIN run screen with the entered K factor active. The K factor is only used if the current unit of measure is a flow unit (see Section 3.2.2). The letter is always appended to the flow unit indication in the run screens when the K function is ON (e.g., sccmK). Turning K ON or OFF or making a change to the K factor value resets the active device channel output to zero.
MFC-CB™ Operation and Maintenance Manual 3.2.3 [POWER] PURPOSE To display of the set value unaltered by K or adjustment values and to display the valve test point. PRINCIPLE The electrical value actually output by MFC-CB in response to a set point entry may be different from the set point value due to the application of a K factor (see Section 3.2.1) and/or an adjustment factor (see Section 3.3.5). See Section 7.1.1 for details on the calculation of the actual set point.
3. OPERATION 3.2.4 [DISPLAY] PURPOSE To select, from a variety of choices, the information that is displayed on the second line of the MFC-CB display. PRINCIPLE MFC-CB supports a variety of advanced DISPLAY functions that are displayed on the bottom line of the MFC-CB display. The available DISPLAY functions are: • DEV1&2 (see Section 3.2.4.1): Displays both device channels simultaneously with DEV1 always on the top line and DEV2 always on the bottom line.
MFC-CB™ Operation and Maintenance Manual The cursor is on the active DISPLAY function. Selecting a DISPLAY function returns to the run screen with the selected DISPLAY function active. See PRINCIPLE above and Sections 3.2.4.1 through 3.2.4.6 for details on each DISPLAY function. The default DISPLAY function is CLEAN which causes the second line of the display to be empty except for the active device channel indicator at the far right (see Section 3.1.1). 3.2.4.
3. OPERATION 3.2.4.2 <2SUM> PURPOSE To display the sum of DEV1 and DEV2 measurement values. See Section 3.2.4, PRINCIPLE. OPERATION To activate the SUM DISPLAY, press [DISPLAY] and select <2sum>. To reach the SUM DISPLAY, it is required that DEV1 and DEV2 be set in the same unit of measure. If the SUM DISPLAY is attempted while the unit of measure on the two device channels is not the same, an error message displays. In this case, set both channels to the same unit of measure and retry.
MFC-CB™ Operation and Maintenance Manual OPERATION To activate the DIF DISPLAY, press [DISPLAY] and select <3dif>. To reach the DIF DISPLAY, it is required that DEV1 and DEV2 be set in the same unit of measure. If the DIF DISPLAY is attempted while the unit of measure on the two device channels is not the same, an error message appears. In this case, set both channels to the same unit of measure and retry. With the DIF DISPLAY active, the MAIN run screen is: 100.00 sccm 99.998 D2-D1 Δ 0.035 1.
3. OPERATION With the RATIO DISPLAY active, the MAIN run screen is: 2.5000 V 2.5003 V 1.0036:1 D2/D1 1. Standard MAIN screen top line for the active device channel. 2. Indication of ratio calculation formula, the active device channel is to the right. 3. Ratio of the inactive and active device channel measurements. 2 While in the RATIO DISPLAY, changing the unit of measure causes the display to revert back to the CLEAN DISPLAY.
MFC-CB™ Operation and Maintenance Manual When the UNIT DISPLAY is selected on the active device channel, the UNIT DISPLAY is also used for the other device channel if possible. When changing device channels, the same unit types are used. If the UNIT DISPLAY setting on the active device channel was for “electrical unit = flow unit”, the display of the new channel will be “electrical unit = flow unit”.
3. OPERATION 3.2.5 [DEV1/2] PURPOSE To toggle the active device channel between DEV1 and DEV2. PRINCIPLE MFC-CB has two analog device channels designated DEVICE 1 and DEVICE 2 (DEV1 and DEV2) (see Section 3.1.2.4). Both channels are always active in the sense that their set points are maintained and they continuously measure.
MFC-CB™ Operation and Maintenance Manual [MFC] is used to select the MFC Profile for the active MFC-CB device channel. When an optional MFC Switchbox is connected and activated on the current device channel, [MFC] also specifies which Switchbox channel to use (see Section 3.4.6). OPERATION To select the MFC profile for the active MFC-CB device channel, press [MFC] from the run screen. If an optional MFC Switchbox is connected and active on the active MFC-CB device channel (see Section 3.4.
3. OPERATION 3.2.7 [DRIVERS] (OPTIONAL) PURPOSE To control the output signals of MFC-CB’s eight (8), 12 V external drivers. PRINCIPLE MFC-CB external drivers are available to drive peripheral equipment, for example solenoid valves, in a system that includes MFC-CB. The driver electrical connections are available from a rear panel connector. See Section 7.3 for driver specifications and pin outs. OPERATION To access the driver control function press [SETUP] and select <4drivers>.
MFC-CB™ Operation and Maintenance Manual OPERATION To enter a set point for the active device channel, press [SET MFC] from the run screen. The display is: 1. Enter set point: 1.0000 V D1 Active device channel indicator. 2. Unit of measure. 3. Entry field for set point value. Defaults to last entry or zero. 2 Use the numerical and editing keys to enter the set point value desired. Press [ENTER] when the desired set point is displayed to return to the run screen with the new set point active.
3. OPERATION PRINCIPLE MFC-CB set points are entered using [MFC]. In some cases, it can be useful to adjust or trim the set point slightly, directly from the run screen without going through set point entry. The MFC-CB jog function makes it easy to adjust the set point slightly. Pressing the [←] or [→] key when in the MAIN run screen causes the set point value to increase or decrease by the amount specified in [SETUP], <2jog> (see Section 3.3.2). Use [SET MFC] to enter a new set point (see Section 3.2.
MFC-CB™ Operation and Maintenance Manual OPERATION To access the SETUP menu, press [SETUP] from the run screen. The display is: 1MFC 2jog 3res 4flowU 5adj Select the desired SETUP function. See PRINCIPLE above and Sections 3.3.1 to 3.3.5 for details on each SETUP function. 3.3.1 <1MFC> (EDIT MFC PROFILES) PURPOSE To create, store and edit the MFC profiles available for selection from [MFC] (see Section 3.2.8).
3. OPERATION The next display is used to enter the full scale voltage or current. Enter the full scale voltage or current of the device and press [ENTER]. If configuring a current (mA) electrical type MFC, you will also be prompted to enter the 0 flow current output value which must be 4 mA or greater. MFC-CB does not support mixed current/voltage MFCs. The next selection specifies the flow unit of measure for this MFC profile.
MFC-CB™ Operation and Maintenance Manual 3.3.3 <3RES> (RESOLUTION) PURPOSE To set the display resolution of MFC-CB set point and measurement displays. PRINCIPLE The resolution with which the MFC-CB displays set points and measurements can be adjusted. This feature can be used to reduce the display resolution when lower precision measurements are being made and additional digits might confuse or distract the operator.
3. OPERATION <#6> corresponds to the sixth of the six available selections in the MFC profile unit screen. Enter the number of the selection that you would like to change. The display becomes: Flow unit type: 1std 3vlm 4none Select the type of flow unit desired (see Table 3). Then select the desired unit. Table 3.
MFC-CB™ Operation and Maintenance Manual The adjustment function is intended to allow MFC-CB to correct an MFC or MFM that is connected to it by making an offset and/or slope adjustment automatically. For additional information on the calculations used by the adjustment function and how they interact with other MFC-CB calculations, see Section 7.1.1. Do NOT use the adjustment function to calibrate MFC-CB set point and measurement signals.
3. OPERATION 3.4 [SPECIAL] PURPOSE To access menu of MFC-CB functions and settings that are less commonly or not normally used in regular operation. PRINCIPLE The [SPECIAL] key accesses a menu of MFC-CB functions and settings that are less commonly or not normally used in regular operation. These functions include: • reset (see Section 3.4.1): Access and execute various reset options. • level (see Section 3.4.2): View and change security protection of MFC-CB functions. • prefs (see Section 3.4.
MFC-CB™ Operation and Maintenance Manual 3.4.1 <1RESET> PURPOSE To reset various MFC-CB settings to default or factory values. PRINCIPLE MFC-CB stores user definable settings in non-volatile memory. The reset menu allows the user to selectively or completely reset these values to factory defaults. Resets clear settings that the user may have made, and should be used only to restore the MFC-CB to a known state. MFC-CB will go through its reboot routine after any type of reset is executed.
3. OPERATION • Adjustment adder to 0 and multiplier to 1 (see Section 3.3.5). • MFC Switchbox to none (see Section 3.4.6). • Screen saver activation to 10 minutes (see Section 3.4.3.1). • Keypad sounds to medium (see Section 3.4.3.2). 3.4.1.2 <2UNITS> PURPOSE/OPERATION To access Reset - Units, press [SPECIAL], <1reset>, <2units>. Reset - Units clears and sets to default all UNIT OF MEASURE functions.
MFC-CB™ Operation and Maintenance Manual 3.4.1.5 <5ALL> PURPOSE/OPERATION Use special caution with this reset as critical calibration data may be altered. To access Reset - All, press [SPECIAL] and select <1reset>, <5all>. Reset - All returns MFC-CB to the original, as delivered factory condition (except the user security level which is not affected by resets). Performs the SETS, UNITS, MFC and CAL RESET functions.
3. OPERATION 3.4.2.1 SECURITY LEVELS The security levels are structured to support typical operating environments as follows: None This level is intended for use only by the system manager and/or calibration facility. It allows access and editing in all areas including calibration information and other settings that affect measurement integrity. Low Low security is designed to protect system calibration information and system diagnostic and maintenance functions against accidental alteration.
MFC-CB™ Operation and Maintenance Manual Table 4.
3. OPERATION OPERATION MFC-CB is delivered with NO active password so access to the User Level menu is open. The user level is set to <1Low>. User levels can be changed freely until a password has been created. RESET functions (see Section 3.4.1) do not affect the password setting. To access the USER LEVEL function, press [SPECIAL] and select <2level>.
MFC-CB™ Operation and Maintenance Manual 3.4.3 <3PREFS> PURPOSE To access a menu of MFC-CB internal operational preferences and functions. These include: • ScrSvr (see Section 3.4.3.1): View and change the SCREEN SAVER function. • sounds (see Section 3.4.3.2): View and change valid and invalid keypad entry sound settings. • time (see Section 3.4.3.3): View and edit the internal time and date settings. • ID (see Section 3.4.3.4): View and edit the MFC-CB user ID.
3. OPERATION 3.4.3.2 <2SOUND> PURPOSE To adjust or suppress the MFC-CB keypad key press sounds. PRINCIPLE MFC-CB provides audible feedback by a brief “beep” when a valid key press is made. Invalid key presses are indicated by a descending two tone “blurp”. The audio frequency of the valid key press beep may be selected from three choices or all keypress sounds may be suppressed. OPERATION To access the key <5prefs>, <2sound>.
MFC-CB™ Operation and Maintenance Manual 3.4.3.4 <4ID> PURPOSE To view or edit the MFC-CB user ID and to view the MFC-CB serial number. PRINCIPLE MFC-CB has a factory programmed serial number that is included on the p rod uc t labe l on the bo ttom o f the case a nd c an be view ed in the introductory screen. MFC-CB also allows the user to store a unique, twelve character, alpha numeric ID number. This feature is frequently used to assign an organizational control ID (e.g.
3. OPERATION 3.4.4 <4CAL> PURPOSE To view and edit MFC-CB electrical signal calibration coefficients and calibration date. The MFC-CB CALIBRATION function is considered part of MFC-CB maintenance and is therefore covered in the Maintenance, Adjustments and Calibration Section of this manual (see Section 5). 3.4.5 <5REMOTE> PURPOSE To configure the MFC-CB COM1, COM2 and IEEE-488 communication ports. To test COM1 and COM2 communications.
MFC-CB™ Operation and Maintenance Manual 3.4.5.1 <1COM1> AND <2COM2> The COMx ports can be set for the specific settings required by the user. The settings are baud rate, parity, data bits and stop bits. The available options are found in Table 5. Table 5. COM1 and COM2 Available Settings BAUD RATE PARITY DATA BITS STOP BITS 300, 600, 1 200, 2 400, 4 800, 9 600, 19 200 NONE, ODD or EVEN 7 or 8 1 or 2 The default COMx settings are 2400, E, 7,1 for both COM ports.
3. OPERATION If COM2→COM1 passes: is displayed briefly followed by the conclusion, . If a test fails: Execution is suspended until [ENTER] is pressed. The MFC-CB RS232 test can fail for three reasons: 1. The RS232 cable being used is incorrect (see Section 4.2.1 for information on the correct cable). 2. COM1 and COM2 do NOT have the same serial communications settings and therefore cannot communicate together (see Section 3.4.5.1 to set the COM ports). 3.
MFC-CB™ Operation and Maintenance Manual When an MFC Switchbox is active on an MFC-CB device channel, the MFC Switchbox channel selection is specified when an MFC profile is selected using [MFC] (see Section 3.2.6). 1. MFC Switchbox control cable (provided with MFC Switchbox) 2. molbox1/MFC-CB to MFC Switchbox cable (provided with MFC-CB) Figure 5. MFC-CB with MFC Switchbox Schematic OPERATION To access the XBOX function press [SPECIAL], <5prefs>.
3. OPERATION 3.4.7 <7LOG> PURPOSE To view and/or clear the MFC-CB event log. PRINCIPLE MFC-CB records to a log each time a memory or identifiable hardware fault occurs. OPERATION To view the event log press [SPECIAL] and select <7log>. The oldest logged event appears. Pressing [ENTER] steps through the logged events from the oldest to the most recent, ending with the option to clear the log or . If NO events have been logged, displays.
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4. REMOTE OPERATION 4. R EMOTE O PERATION 4.1 OVERVIEW Most of the MFC-CB’s front panel functions can also be executed by commands from a remote computer. The host computer communicates with the MFC-CB using the MFC-CB COM1 RS232 port or the IEEE-488 port. The command syntax is the same for either port except when using the IEEE STD. 488.2 Common Commands. 4.2 INTERFACING Sending a command to the MFC-CB places it into remote mode.
MFC-CB™ Operation and Maintenance Manual 4.2.1 RS232 INTERFACE To establish RS232 communications, a standard pin to pin DB-9F to DB-9M RS232 cable must be used to connect the host COM port to MFC-CB COM1. The interface settings of both ports must be the same. MFC-CB supports an independent RS232 self-test to verify that the MFC-CB RS232 ports are operating correctly and the interface cable being used is valid.
4. REMOTE OPERATION 4.2.1.2 COM2 The MFC-CB COM2 RS232 interface is located on the rear panel. It is a 9-pin male DB connector configured as a DTE device. Data is transmitted out of the MFC-CB using pin 3 and is received on pin 2. This allows a standard pin to pin DB-9F to DB-9M RS232 cable to be used to connect to a DCE slave. Handshaking is NOT required or supported. COM2 can be used to allow the host computer to communicate with another device (e.g., a molbox or another MFC-CB) through the MFC-CB.
MFC-CB™ Operation and Maintenance Manual 4.3 COMMANDS 4.3.1 COMMAND SYNTAX All MFC-CB commands are ASCII strings. The user must wait for the MFC-CB to reply before sending another command. An exception to this is the use of any of the IEEE STD. 488.2 Common Commands via the IEEE-488 interface (these common commands are shown first, and always start with an asterisk, “*”).
4. REMOTE OPERATION Table 8. Command Summary (Continued) SYNTAX REMOTE RESET RES(n)(=) SCRSAV(=) SN TEXT:CLRn= TEXTn= TIME(=) VER VIN(n) VOUT(n))(=) VSENSE(n) VVALTEST(n) 4.3.3 PURPOSE Enable remote local lockout operation. Reset the MFC-CB settings to the default operating parameters. Read or set the display resolution. Read or set the front panel screen saver period. Read the serial number of the MFC-CB. Clear a portion of the MFC-CB's front panel display.
MFC-CB™ Operation and Maintenance Manual 4.3.5 COMMAND DESCRIPTIONS Each command description gives the full syntax showing usage. Ranges of parameters or parameter types are indicated. There are two types of commands. The Common and Status Commands support IEEE STD. 488.2, while the MFC-CB commands access all other functions. 4.3.5.1 IEEE STD. 488.2 COMMON AND STATUS COMMANDS The MFC-CB supports a set of commands that are common to all instruments conforming to IEEE STD. 488.2 protocol.
4. REMOTE OPERATION ∗ESR? Purpose Syntax Query Reply Remark Example Read the standard event register. “∗ESR?” n (0 to 255) The standard event register contents are cleared after reading. The reply is in decimal numeric form. Command: “*ESR?” Reply: 4” ∗IDN? Purpose Syntax Remarks Query Reply Example Identify the MFC-CB embedded software version, and serial number. “∗IDN?” The identification reply is made up of the manufacturer, the model, the serial number and the software version.
MFC-CB™ Operation and Maintenance Manual ∗RST Purpose Syntax Remarks Example Resets the MFC-CB settings to factory settings. “∗RST” This command sets the MFC-CB settings to factory settings which is equivalent to pressing [SPECIAL] on the front panel and selecting <5Reset>, 1sets. This does not affect the communications or calibration settings.
4. REMOTE OPERATION 4.3.5.2 MFC-CB COMMANDS # Purpose Syntax Arguments Remarks Example To allow the host computer to communicate with a device connected to the MFC-CB COM2 port. “#XX” Xx: The string to send out of the COM2 port. It must be less than 40 characters long. The MFC-CB COM2 port can be used to communicate to another RS232 device (e.g., another MFC-CB or a multimeter).
MFC-CB™ Operation and Maintenance Manual ACAL:MEAS(n)(=) Purpose Syntax Arguments Defaults Remarks Example Errors See Also Read or set the measurement calibration coefficients. “ACAL:MEASn” “ACAL:MEASn=Vadder, Vmult, Cadder, Cmult” Device channel number (optional). Uses the active device n: channel if not given.
4. REMOTE OPERATION ACAL:SET(n)(=) Purpose Syntax Arguments Defaults Remarks Example Errors See Also Read or set the set point calibration coefficients. “ACAL:SETn” “ACAL:SETn=Vadder, Vmult, Cadder, Cmult” Device channel number (optional). Uses the active device n: channel if not given. '1' to address DEV1 settings '2' to address DEV2 settings Vadder: The voltage set adder in Volts Vmult: The voltage set multiplier Cadder: The current set adder in mA The current set multiplier Cmult: “ADJ:SETn=0.
MFC-CB™ Operation and Maintenance Manual ADJ:MEAS(n)(=) Purpose Syntax Arguments Defaults Remarks Example Errors See Also Read or set the user measurement adjustment setting. “ADJ:MEASn” “ADJ:MEASn=adder, mult” Device channel number (optional). Uses the active device n: channel if not given. '1' to address DEV1 settings '2' to address DEV2 settings adder: The measurement adjustment adder in %FS (0 to 100 %) mult: The adjustment multiplier “ADJ:MEASn=0.0000%, 1.
4. REMOTE OPERATION CIN(n) Purpose Syntax Arguments Remarks Example Errors See Also Read the measurement current if in ‘mA’ mode. “CINn” n: Device channel number (optional). Uses the active device channel if not given. '1' to address DEV1 '2' to address DEV2 The MFC-CB interface can measure current output of an MFC/MFM. The MFC-CB must be in ‘mA’ mode before this can be done (see the “MFCCH” command). The returned data is always in “mA”. Command: “CIN” Reply: “5.
MFC-CB™ Operation and Maintenance Manual COUT(n)(=) Purpose Syntax Arguments Defaults Remarks Example Errors See Also Read or set the current output setpoint. “COUTn” “COUTn=current” Device channel number (optional). Uses the active device n: channel if not given. '1' to address DEV1 '2' to address DEV2 Current: The current to be sent to the MFC (4 to 20 mA). “COUTn=4” The MFC-CB can set a current setpoint for an MFC. The MFC-CB must be in current mode before this can be done (see the “MFCCH” command).
4. REMOTE OPERATION DISP(=) Purpose Syntax Arguments Defaults Remarks Example Errors See Also Read or set the display mode for the MFC-CB front panel. "DISP" “DISP=mode Mode: '1' for DEV1&2 '2' for SUM '3' for DIF '4' for RATIO '5' for UNIT '6' for CLEAN “DISP=6” ("clean") There are six different display modes available in the MFC-CB. These can be selected locally using the [DISPLAY] key or by the "DISP=" command.
MFC-CB™ Operation and Maintenance Manual DRV(=) Purpose Syntax Arguments Defaults Remarks Example Errors See Also Read or set the status of all of the external 12V drivers. “DRV=bitfield “DRV” Bitfield: The Bitfield (0 to 255) defining which valves are energized, and which are de-energized.
4. REMOTE OPERATION ID(=) Purpose Syntax Default Arguments Remarks Example Errors See Also Read or set the user defined identification label. “ID=string” “ID” “ID=NONE” string: An alphanumeric string up to 12 characters wide. The user defined ID label can be used to allow the user to “tag” the MFC-CB with a unique identifier. The reply will be padded if needed to ensure it is 12 characters wide. This ID is stored in non-volatile memory and cannot be erased by a power failure, system fault or reset.
MFC-CB™ Operation and Maintenance Manual LOCAL Purpose Syntax Remarks Example See Also Enable the front panel controls if in remote and go to local mode. “LOCAL” In LOCAL mode, all front panel operations are available. The LOCAL command deactivates REMOTE mode. Command: “LOCAL” Reply: “LOCAL” “REMOTE” MEM Purpose Syntax Remarks Example See Also Read the memory test status. “MEM” On power up, a memory test is run to check the integrity of the MFC-CB internal data NVRAM.
4. REMOTE OPERATION POWER= Purpose Syntax Arguments Remarks Example Errors See Also Turns the MFC-CB's soft power ON/OFF. “POWER=state” state: ‘0’ to power the MFC-CB OFF ‘1’ to power the MFC-CB ON The MFC-CB will automatically power up when it receives a remote command while in soft power OFF. Command: “POWER=1” Reply: “POWER=1” ERR# 7: The state argument is not a '0' or a '1' 3.1.2.3 REMOTE Purpose Syntax Remarks Example See Also Enable remote local lockout operation.
MFC-CB™ Operation and Maintenance Manual SCRSAV(=) Purpose Syntax Default Arguments Remarks Example Errors See Also Read or set the front panel screen saver period. “SCRSAV=period” “SCRSAV” “SCRSAV=10” Period: The period of inactivity before the display dims. The MFC-CB display will dim after a period of inactivity. Command: “SCRSAV=60” Reply: “60 ” ERR# 6: The data given is invalid 3.4.3.1 SN Purpose Syntax Remarks Example Read the serial number of the MFC-CB. “SN” Each MFC-CB is serialized.
4. REMOTE OPERATION TEXTn= Purpose Syntax Arguments Remarks Example Errors See Also Specify text to be written to the MFC-CB's front panel display. “TEXTn=text” n: The position on the front display to display the text (1 to 40) text: The text to display The MFC-CB normally uses the same displays in remote mode as in local operation, but the display can also be used to indicate user text.
MFC-CB™ Operation and Maintenance Manual VIN(n) Purpose Syntax Arguments Remarks Example Errors See Also Read the MFC measurement voltage if in voltage mode. “VINn” n: Device channel number (optional). Uses the active device channel if not given. '1' to address DEV1 '2' to address DEV2 The MFC-CB can measure the voltage signal from an MFC/MFM. The MFC-CB must be in voltage mode before this can be done (see the "MFCCH" command). The returned data is always in volts. Command: “VIN2 Reply: “1.
4. REMOTE OPERATION VSENSE(n) Purpose Syntax Arguments Remarks Example Errors See Also Read the voltage sensed at the MFC/MFM terminal. “VSENSEn” n: Device number (optional). Uses the active device if not given. '1' to address DEV1 '2' to address DEV2 The MFC-CB uses a voltage sense line to measure the voltage present at an external MFC. This sense voltage is used to re-adjust the voltage sent to the MFC to compensate for line losses. Command: “VSENSE1 Reply: “2.
MFC-CB™ Operation and Maintenance Manual 4.4 STATUS SYSTEM The status system includes the status reporting system which reports general MFC-CB events. The user can select which MFC-CB events will cause a status change event. These events are then reported to the status system (bit7 and bit3 of the status byte register), which also must be configured for the STATus subsystem to generate the service requests described in Section 4.4.1.
4. REMOTE OPERATION The status byte register can be read using the “*STB?” query, or by performing a serial poll on the IEEE-488 bus. If you read this using a serial poll then Bit 6 is the RQS. If the “∗STB?” query is used, then Bit 6 is the MSS bit. All of the other bits are common to both types of query. Each of these status bits can cause an SRQ to occur. The Service Request Enable Register (“∗SRE” program message) determines which of these flags are able to assert the SRQ line.
MFC-CB™ Operation and Maintenance Manual 4.4.1.2 STANDARD EVENT REGISTER The MFC-CB contains an 8 bit Standard event register that reflects specific MFC-CB events. Enabled events in this register will set or clear the ESB bit of the status byte register. Table 11. Standard Event Register PON URQ CMD EXE DDE QYE RQC OPC (128) (64) (32) (16) (8) (4) (2) (1) This register can be read using the “*ESR?” query.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION 5. M AINTENANCE , A DJUSTMENTS A ND C ALIBRATION 5.1 OVERVIEW MFC-CB was designed for maintenance free operation. No maintenance is required other than: • Electrical Output and Measurement Calibration: The stability of the analog voltage and current measurements over time is dependent upon the conditions of use. The MFC-CB voltage and current functions should be verified regularly. See Section 5.2 for instructions.
MFC-CB™ Operation and Maintenance Manual 5.2 VERIFICATION AND CALIBRATION OF ELECTRICAL SIGNALS 5.2.1 PRINCIPLE MFC-CB set and reads voltage and current values on two device channels (DEV1, DEV2). The MFC-CB signals (each on 2 channels, DEVICE 1 and DEVICE 2) are: • Set (V and mA): The electrical output. The “entered”, “displayed” or “nominal” set value is the value input by the user and displayed on the MFC-CB front panel. The “actual” set value is the value actually output by MFC-CB.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION 5.2.2 FRONT PANEL ADJUSTMENT OF ELECTRICAL SIGNALS 5.2.2.1 PRINCIPLES See Section 5.2.1 for general information on the principles of MFC-CB electrical signal adjustment. MFC-CB provides front panel capability to mathematically adjust each of the MFC-CB electrical output and input signals. The adjustments are accomplished by an adder and multiplier that is used to offset and adjust the slope of each signal’s response.
MFC-CB™ Operation and Maintenance Manual 5.2.2.2 <1SENSE> PURPOSE To view and adjust the readings of the device channel sense line. See Sections 5.2.2.1 and 5.2.1 for information on MFC-CB device channel signal calibration. OPERATION To view the reading of the sense line and the adder(A) and multiplier(M), press [SPECIAL], <4cal>, select the desired device channel, and press <1sense>, <1view>. The display is: 1 2 2.50022 V Sense A0.00000V M1.0000 D1 4 5 3 1.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION OPERATION To view the device channel measure signal and the current measure adder (A) and multiplier (M), press [SPECIAL], <4cal>, select the desired device channel, press <2meas>, select voltage or current, and press <1view>. The display is: 1 2 3.0005 V Measure A0.00000V M1.0000 D1 4 5 3 1. Measure value with the Measure cal adder and multiplier applied (V or mA). 2. Indication that this is a display of the Measure signal. 3.
MFC-CB™ Operation and Maintenance Manual The calibration of the set value is used to minimize the amount of correction to the set point based on sense measurement that is necessary to achieve the desired set point at the MFC. This is accomplished by adjusting the set point value using an adder and a multiplier (see Section 5.2.1).
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION 5.2.2.5 <4VALVE> PURPOSE To view and adjust the device channel valve voltage signal. See Sections 5.2.2.1 and 5.2.1 for information on MFC-CB device channel signal calibration. OPERATION To view the device channel valve voltage signal and the current valve voltage adder (A) and multiplier (M), press [SPECIAL], <4cal>, select the desired device channel, press <4valve>, <1view>.
MFC-CB™ Operation and Maintenance Manual 5.3 RELOADING EMBEDDED SOFTWARE INTO FLASH MEMORY MFC-CB uses FLASH memory. This allows the embedded software that controls MFC-CB operations and functions to be loaded into MFC-CB over its COM1 port from a computer with a simple FLASH loading utility. To replace corrupted software or upgrade your software, access the DHI worldwide web site at www.dhinstruments.com and go to “SOFTWARE” located under “SUPPORT”.
6. TROUBLESHOOTING 6. T ROUBLESHOOTING 6.1 OVERVIEW MFC-CB is a sophisticated measuring instrument with advanced on-board features and functions. Before assuming that unexpected behavior is caused by a system defect or breakdown, the operator should use this manual and other training facilities to become thoroughly familiar with MFC-CB operation.
MFC-CB™ Operation and Maintenance Manual Table 12. Troubleshooting Checklist (Continued) SYMPTOM PROBABLE CAUSE Bottom line of display has changed and you want to change it back. The DISPLAY function has been used to change the display. Use [DISPLAY] to set bottom line to desired display. (3.2.4) Bottom line of display is blank. DISPLAY mode is “clean”. Operation is normal. Use [DISPLAY] to change bottom line display if desired. (3.2.4.6 and 3.2.4) Measured value appears to be grossly incorrect.
7. APPENDIX 7. A PPENDIX 7.1 CALCULATIONS 7.1.1 ELECTRICAL SET POINT AND MEASUREMENT CALCULATIONS MFC-CB outputs electrical values in response to output commands from the user. It also measures electrical values. The output and measurement values can be adjusted by various user coefficients including the calibration coefficients (see Section 5), a K factor (see Section 3.2.1) and adjustment factors (see Section 3.3.5).
MFC-CB™ Operation and Maintenance Manual Note that: 1. All values are device channel specific. 2. In some cases, the displayed set and measure values are in a unit of flow or %FS. In this case they must be converted to and from electrical values prior to or just after the electrical value calculations (see Section 7.1.2). 3. When the display unit of measure is electrical or %FS, K = 1 (has no effect). 7.1.
7. APPENDIX • To convert an electrical measurement into a flow unit MFC-CB first follows the regular electrical value to display calculation (see Section 7.1.1) and then converts the electrical value into a flow value.
MFC-CB™ Operation and Maintenance Manual Table 13. MFC-CB DEV1 and DEV2 Connector Pin Out (Continued) MFC-CB DEV1, DEV2 25 PIN DSUB CONNECTOR PIN NO. SIGNAL 11 Valve Test Used for direct measurement of the MFC internal valve voltage. Not available on all MFCs. 12 Current MFC Measure (+) Only used for current controlled devices. This is the mA signal that represents the MFC’s measure. 13 Current MFC Set (+) Only used for current controlled devices.
7. APPENDIX 7.2.1 POPULAR CONFIGURATIONS The following configuration can be used with most card edge style MFCs. Any differences tend to relate to the handling of the ground (common) lines (pins 2, B and C). Most cable problems can be resolved by either shorting pins B and C or by swapping the signals connected to pin 2 of the card edge connector with the signals connected to pin B of the card edge connector. The configuration below should work with the following MFCs.
MFC-CB™ Operation and Maintenance Manual The following configuration can be used with: • Brooks model 5850E, and 5851E Table 15. Brooks MFC Connector Pin Out MFC-CB DEV1, DEV2 25 PIN DSUB CONNECTOR PIN NO. SIGNAL DESCRIPTION MFC CARD EDGE CONNECTOR PIN NO. MFC 15 PIN DSUB CONNECTOR PIN NO.
7. APPENDIX The male connector (P/N 102478) for the DRIVERS port is supplied with the MFC-CB accessories if the driver option was ordered. Table 17 and Figure 7 should be used as reference when building a cable to utilize the drivers port. Table 17.
MFC-CB™ Operation and Maintenance Manual 7.4 GLOSSARY A (adder) A value that is added to a set point or measurement to offset the value. Clean A DISPLAY function in which the second line of the display is blank (clean) except for the active channel indicator. DEV1&2 A DISPLAY function in which DEVICE 1 and DEVICE 2 are displayed simultaneously. DEVICE 1 set point and measurement are on the top line and DEVICE 2 set point and measurement are on the bottom line.
7. APPENDIX 7.5 WARRANTY STATEMENT Except to the extent limited or otherwise provided herein, DH Instruments, a Fluke Company (DHI) warrants for one year from purchase, each new product sold by it or one of its authorized distributors, only against defects in workmanship and/or materials under normal service and use. Products which have been changed or altered in any manner from their original design, or which are improperly or defectively installed, serviced or used are not covered by this warranty.
MFC-CB™ Operation and Maintenance Manual NOTES ©2001~2007 DH Instruments, a Fluke Company Page 96
