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DH Instruments MFC-CB Operation And Maintenance Manual

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MFC-CB™
MFC Control Box
Operation and Maintenance Manual
©2001~2007 DH Instruments, a Fluke Company

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  • Page 1 MFC-CB™ MFC Control Box Operation and Maintenance Manual ©2001~2007 DH Instruments, a Fluke Company...
  • Page 2 DH Instruments, a Fluke Company 4765 East Beautiful Lane Phoenix AZ 85044-5318 USA. DH Instruments strives to ensure the accuracy of its published materials; however, no warranty, expressed or implied, is provided.

  • Page 3: Table Of Contents

    2.1.2 INSPECTING CONTENTS ..........................7 SITE REQUIREMENTS..........................8 INITIAL SETUP............................8 2.3.1 PREPARING FOR OPERATION ........................8 2.3.2 MFC-CB TO MFC OR MFM CONNECTION ......................8 POWER UP AND VERIFICATION......................8 2.4.1 POWER UP ................................8 2.4.2 CHECK/SET SECURITY LEVEL ........................9 3. OPERATION ..................11 GENERAL MANUAL OPERATION ......................11 3.1.1...
  • Page 4 MFC-CB™ Operation and Maintenance Manual 3.2.4.6 <6CLEAN> ............................24 3.2.5 [DEV1/2] ................................25 3.2.6 [MFC]................................25 3.2.7 [DRIVERS] (OPTIONAL) ..........................27 3.2.8 [SET MFC]................................27 3.2.9 [←] AND [→] (JOG MFC SET POINT) ......................28 [SETUP] ..............................29 3.3.1 <1MFC> (EDIT MFC PROFILES) ........................30 3.3.2 <2JOG> ................................31 3.3.3...

  • Page 5: Table Of Contents

    ELECTRICAL SET POINT AND MEASUREMENT CALCULATIONS ............87 7.1.2 CONVERTING BETWEEN ELECTRICAL UNITS AND FLOW OR %FS UNITS..........88 DEVICE CHANNEL CONNECTORS AND CABLES................89 7.2.1 POPULAR CONFIGURATIONS ........................91 DRIVERS ..............................92 GLOSSARY .............................94 WARRANTY STATEMENT........................95 Page III ©2001~2007 DH Instruments, a Fluke Company...

  • Page 6: Tables

    Standard Event Register ......................76 Table 12. Troubleshooting Checklist ....................... 85 Table 13. MFC-CB DEV1 and DEV2 Connector Pin Out ................ 89 Table 14. Common MFC Connector Pin Out ..................91 Table 15. Brooks MFC Connector Pin Out ....................92 Table 16.

  • Page 7: About This Manual

    FOR THOSE OF YOU WHO “DON’T READ MANUALS”, GO DIRECTLY TO SECTION 2.3, INITIAL SETUP, TO SET UP YOUR MFC-CB. THEN GO TO SECTION 2.4, POWER UP AND VERIFICATION. THIS WILL GET YOU RUNNING QUICKLY WITH MINIMAL RISK OF CAUSING DAMAGE TO YOURSELF OR YOUR MFC-CB.
  • Page 8 MFC-CB™ Operation and Maintenance Manual Page vi ©2001~2007 DH Instruments, a Fluke Company...

  • Page 9: Introduction

    As an option, (8) external 12 V drivers can also be included to excite peripheral equipment such as solenoid valves. MFC-CB provides a local user interface via a front panel key pad and display and includes advanced on-board functions. Remote communication capability is supported by RS232 and IEEE-488 interfaces.

  • Page 10: Analog Output Specifications

    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)

  • Page 11: Front And Rear Panels

    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. Display Multi-Function Keypad Remote Communication Indicator SOFT ON/OFF Key and Indicator Figure 1. MFC-CB Front Panel Page 3 ©2001~2007 DH Instruments, a Fluke Company...

  • Page 12: Rear Panel

    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. Electrical power connector (IEC60320) Power ON/OFF switch Connector for 12V DRIVERS...

  • Page 13: Internal View

    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.

  • Page 14: Power Entry Module

    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;...

  • Page 15: Installation

    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.

  • Page 16: Site Requirements

    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).

  • Page 17: Check/Set Security Level

    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.
  • Page 18 MFC-CB™ Operation and Maintenance Manual Page 10 ©2001~2007 DH Instruments, a Fluke Company...

  • Page 19: Operation

    3.1.1 MAIN RUN SCREEN The MFC-CB MAIN run screen is its home display that is reached on power up and from which other functions and menus are accessed. It is the top level of all menu structures. The MAIN run screen is where the MFC-CB is left in normal operation. It displays the set point output, if applicable, and the measurement from the MFC or MFM as well as a variety of additional information if desired.

  • Page 20: General Operating Principles

    When a number is too large to show in the allocated display space, MFC-CB displays <********>. MFC-CB has a SCREEN SAVER function that causes the display to dim if no key is pressed for 10 minutes. Pressing a key restores full power to the display. The screen saver activation time can be changed or screen saving can be completely suppressed (see Section 3.4.3.1).

  • Page 21: Sounds

    3.1.2.2 SOUNDS MFC-CB is equipped with a variable frequency tone device to provide audible feedback and alarms. Sounds are used for the following indications: Valid key press: Brief beep. Choice between three frequencies or NO sound is available (see Section 3.4.5.2).

  • Page 22: Soft [On/Off] Key

    See the corresponding manual sections for full detail on each direct function. It may be useful to keep a copy of Table 2 near the MFC-CB, especially when first becoming acquainted with its operation.

  • Page 23: Table 2. Summary Of Mfc-Cb Direct Function Key Operation

    DRIVERS Display the set point unaltered by K and/or adjustment values and the valve test point. POWER Define the DISPLAY function for the second line of the MFC-CB display. Choices include DEV1&2, sum, difference, ratio, 2 unit, clean. DISPLAY Set/change an MFC gas correction factor (K factor).

  • Page 24: Direct Function Keys

    MFC-CB applies the K factor only when the unit of measure is a flow unit. When the unit of measure is an electrical unit (V or mA) or %FS, the K factor has no effect.

  • Page 25: Unit]

    PRINCIPLE MFC-CB operates in either volts (V) or milliamps (mA). It also converts V or mA to flow values using a simple linear relationship between the voltage or current range and the flow range in a flow unit (see Section 7.1.2).

  • Page 26: Power]

    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.

  • Page 27: Display]

    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 •...

  • Page 28: 1Dev1&2

    (see Section 3.1.1). 3.2.4.1 <1DEV1&2> PURPOSE To view both MFC-CB device channels simultaneously. See Section 3.2.4, PRINCIPLE. OPERATION To activate the DEV1&2 DISPLAY, press [DISPLAY] and select <1DEV1&2>.

  • Page 29: 2Sum

    To go to a DISPLAY other than SUM, press [DISPLAY] and make a new DISPLAY choice. 3.2.4.3 <3DIF>(DIFFERENCE) PURPOSE To display the difference between the measurement of the inactive device channel and of the active device channel. See Section 3.2.4, PRINCIPLE. Page 21 ©2001~2007 DH Instruments, a Fluke Company...

  • Page 30: 4Ratio

    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.

  • Page 31: 5Unit

    With the UNIT DISPLAY active the MAIN run screen is: Standard MAIN run screen top line. Alternate unit of measure selected for UNIT 2.5000 V 2.5003 V DISPLAY. = 500.06 sccm Equivalent of the measurement in the alternate unit of measure. Page 23 ©2001~2007 DH Instruments, a Fluke Company...

  • Page 32: 6Clean

    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...

  • Page 33: Dev1/2]

    [DEV1/2] is used to switch active device channels. Do not confuse the MFC-CB DEVICE 1 and DEVICE 2 channels with the five (5) channels available on the optional MFC Switchbox. The MFC Switchbox allows MFC-CB DEVICE 1 or DEVICE 2 to be directed to one of five continuously powered Switchbox channels (see Section 3.4.6).
  • Page 34 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...

  • Page 35: Drivers] (Optional)

    3.2.8 [SET MFC] PURPOSE To enter a set point value for MFC-CB to output on the active device channel (DEV1 or DEV2). PRINCIPLE MFC-CB outputs and reads electrical signals on its two device channels, DEV1 and DEV2. The value to output (the MFC set point) can be specified remotely or by front panel entry using [SET MFC].

  • Page 36: And [→] (Jog Mfc Set Point)

    If the set point value entered results in an out of range electrical output value, MFC-CB displays an error message. Press [ESCAPE] or [ENTER] to return to the <Enter set point:>...

  • Page 37: Setup]

    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...

  • Page 38: 1Mfc> (Edit Mfc Profiles)

    MFC profiles number 3 to 99 are available for user set up using [SETUP], <1MFC>. In custom profiles, a flow unit and range are specified so that MFC-CB can convert between electrical values and flow values and support set point entry and measurement display in a flow unit.

  • Page 39: 2Jog

    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.

  • Page 40: 3Res> (Resolution)

    The units that are available by default are the six indicated in Section 3.2.2. MFC-CB supports many other units. These other units can be made available by customizing the MFC profile unit selection screen. To customize the MFC profile unit selection screen, Set up user unit #6 press [SETUP], <4flowU>.

  • Page 41: 5Adj> (Adjustment)

    PRINCIPLE The adjustment function gives the user the capability to mathematically adjust the set point output and the value measured back by MFC-CB. This is accomplished by setting an adder and/or a multiplier. There are separate adders and multipliers for the set point and for the measurement.
  • Page 42 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.

  • Page 43: Special]

    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.

  • Page 44: 1Reset

    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.

  • Page 45: 2Units

    Reset - Cal clears and sets to default the user calibration values (see Section 5) including: • DEV1 and DEV2 sense, measure, set and valve: Adder: 0 Multiplier: 1 • DEV1 and DEV2 calibration date to 19980101. Page 37 ©2001~2007 DH Instruments, a Fluke Company...

  • Page 46: 5All

    To set user protection levels that restrict access to certain functions and to edit the password required for changing user levels. PRINCIPLE MFC-CB’s front panel user interface provides the means to access all MFC-CB us er d e fined da ta ,...

  • Page 47: Security Levels

    High security protects all operating parameters. It is intended to minimize operator choices (e.g., to operate in a single, inalterable configuration). MFC-CB is delivered with the security level set to low to avoid inadvertent altering of critical internal settings but with unrestricted access to changing security level setting.

  • Page 48: Table 4. Security Levels - Functions Not Executed Per Function/Level

    MFC-CB™ Operation and Maintenance Manual Table 4. Security Levels - Functions NOT Executed Per Function/Level KEYS MEDIUM HIGH • • [UNIT] • • [POWER] • [DISPLAY] • [DEV1/DEV2] • [MFC] • • [DRIVERS] • • [SETUP], <1MFC> • • [SETUP], <2jog>...
  • Page 49 When a password is entered correctly, operation proceeds to the <1change user level 2edit password> screen. The first field, <nnnn>, is the serial number of the MFC-CB, followed by a second field, <xx>, that counts the number of times that a secondary password has been used.

  • Page 50: 3Prefs

    To adjust the activation time of MFC-CB’s SCREEN SAVER function. PRINCIPLE MFC-CB has a SCREEN SAVER function which causes the display to dim after a front panel key is not pressed for a certain amount of time. The default screen saver activation time is 10 minutes.

  • Page 51: 2Sound

    Th e da te mus t be spec ifie d in YYYYMMDD format. The MFC-CB date and time are set to United States Mountain Standard Time in the final test and inspection process at the factory. If desired, use the TIME function to set your local time and date.

  • Page 52: 4Id

    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.

  • Page 53: 4Cal

    COM1 sends a message to COM2. COM2 sends a message to COM1. In each step, MFC-CB checks the message received at the receiving COM port. If the receiving COM port times out or receives an incorrect message, that step of the test fails.

  • Page 54: 1Com1> And <2Com2

    The IEEE-488 port address can be defined from 1 to 31. The default address is 10. The MFC-CB sends a line feed (<LF>) and asserts the EOI line at the end of all transmitted messages. It looks for a line feed and/or assertion of the EOI line to terminate incoming messages (see Section 4).

  • Page 55: 6Xbox

    Switchbox. This allows multiple MFCs or MFMs to be connected to one of the MFC-CB device channels and the MFC-CB device channel signal to be switched between them. As the MFC Switchbox permanently powers all five channels, this feature is frequently used to keep multiple MFCs connected and warmed up for immediate use.

  • Page 56: Figure 5. Mfc-Cb With Mfc Switchbox Schematic

    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). MFC Switchbox control cable (provided with MFC Switchbox) molbox1/MFC-CB to MFC Switchbox cable (provided with MFC-CB) Figure 5.

  • Page 57: 7Log

    <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 <Yes>...
  • Page 58 MFC-CB™ Operation and Maintenance Manual Page 50 ©2001~2007 DH Instruments, a Fluke Company...

  • Page 59: Remote Operation

    Sending a command to the MFC-CB places it into remote mode. The remote indicator at the lower right hand corner of the MFC-CB display lights when the MFC-CB is in remote mode. It also flickers when data transfers are occurring. The menus usually accessed from the front panel are locked-out while in remote, with the exception of the [POWER] key.

  • Page 60: Rs232 Interface

    DB connector configured as a DCE device. Data is transmitted out of MFC-CB using pin 2, and is received on pin 3. This allows a standard pin to pin DB-9M to DB-9F RS232 cable to be used to connect to a DTE host. Handshaking is NOT required or supported.

  • Page 61: Com2

    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.

  • Page 62: 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, “*”).

  • Page 63: Error Messages

    4.3.3 ERROR MESSAGES The MFC-CB always replies to a command except for the use of any of the IEEE STD. 488.2 Common Commands (non query form) via the IEEE-488 interface. If the command is incorrect or contains invalid data, an error number will be returned in the form “ERR# n”...

  • Page 64: Command Descriptions

    Query forms of these commands must be followed by a question mark and IEEE-488.2 Common Commands always start with an asterisk (“*”). Unlike the other MFC-CB commands, they must have a space instead of an equals sign (“=“) between the command and any arguments. Also unlike the other MFC-CB commands, if you are using the IEEE-488 port, the query form (command is immediately followed by a “?”) must be used to get a reply.
  • Page 65 “∗OPC” “∗OPC?” Remarks This command enables the MFC-CB to set the OPC bit in the standard event status register when it has completed all pending functions. The query replies with a “1” when all functions are complete. Since the MFC-CB does not support overlapping commands, this command has no practical use.
  • Page 66 (as if the “∗RST” program message was executed), and the ∗TST query returns a ‘1’. If the MFC-CB passed the test on power up OR if the ∗TST query was used at least once since the unit was powered up, the reply is ‘0’.

  • Page 67: Mfc-Cb Commands

    MFC-CB and another device. A carriage return and a line feed (<CR><LF>) are added to the string. After this command is issued, the MFC-CB will reply back with the first string received by the MFC-CB COM2 port that is terminated with a carriage return.
  • Page 68 MFC-CB™ Operation and Maintenance Manual ACAL:MEAS(n)(=) Purpose Read or set the measurement calibration coefficients. Syntax “ACAL:MEASn” “ACAL:MEASn=Vadder, Vmult, Cadder, Cmult” Arguments Device channel number (optional). Uses the active device channel if not given. '1' to address DEV1 settings '2' to address DEV2 settings...
  • Page 69 The valve calibration coefficients affect the valve voltage measurement. Example Command: “ACAL:VALVE2=0.01, 1” Reply: “0.0100 V,1.00000” Errors ERR# 6: The data given is invalid ERR# 10: The prefix "n" is invalid See Also 5.2.2.1, 5.2.2.5, "DEV", "ACAL:SET", "ACAL:DATE" Page 61 ©2001~2007 DH Instruments, a Fluke Company...
  • Page 70 The user set adjustment affects the set point signal and is used to compensate for line loss or other imperfections in the MFC interface when setting the MFC voltage or current. The measurement adjustment is device channel specific. Do not confuse this adjustment with the MFC-CB calibration coefficients. Example Command: “ADJ:SET2=3, 1.003”...
  • Page 71 '2' to address DEV2 Remarks 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”. Example Command: “CIN”...
  • Page 72 The current to be sent to the MFC (4 to 20 mA). Defaults “COUTn=4” Remarks 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). The data is always in “mA”. Example Command: “COUT1=12”...
  • Page 73 ‘1’ to energize the driver Defaults “DRVn=0” Remarks The MFC-CB has the option of controlling up to eight external 12V drivers. This command allows control of one driver without affected the other seven drivers. See “DRV” to control all of the drivers simultaneously. Example Command: “DRV3”...
  • Page 74 MFC-CB™ Operation and Maintenance Manual DRV(=) Purpose Read or set the status of all of the external 12V drivers. Syntax “DRV=bitfield “DRV” Arguments Bitfield: The Bitfield (0 to 255) defining which valves are energized, and which are de-energized. The following values represent...
  • Page 75 An alphanumeric string up to 12 characters wide. Remarks 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.
  • Page 76 “MEM” Remarks On power up, a memory test is run to check the integrity of the MFC-CB internal data NVRAM. If the memory has been corrupted, "FATAL MEMORY FAULT" is displayed on power up to alert the user, and the memory test status command returns a ‘0’.
  • Page 77 Reset the MFC-CB to the default operating parameters. Syntax “RESET” Remarks The “RESET” command can be given to return certain MFC-CB settings to a default state. This reset corresponds to the RESET - SETS function from the front panel. Example Command: “RESET”...
  • Page 78 Read the serial number of the MFC-CB. Syntax “SN” Remarks Each MFC-CB is serialized. This serial number is also imprinted on the product label on the bottom of the MFC-CB and is displayed in the power up introductory screen. Example Command: “SN”...
  • Page 79 The text to display Remarks 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. The "TEXTn=" command clears the display if the normal measurement data is still being displayed before displaying the text.
  • Page 80 The MFC-CB can output a voltage setpoint. The initial voltage is set, and then corrected if needed according to the measurement of the "sense" input. The MFC-CB must be in voltage mode before this can be done (see the “MFCCH” command). The data is always in volts.
  • Page 81 '1' to address DEV1 '2' to address DEV2 Remarks 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.

  • Page 82: 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.
  • Page 83 Indicates that the SRQ line of the IEEE-488 interface has been asserted by the MFC-CB. This bit is cleared when a serial poll is performed on the MFC-CB, and is a part of the status byte register when read using a serial poll. This bit does not apply if the COM1 port is being used.

  • Page 84: Standard Event Register

    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...

  • Page 85: Maintenance, Adjustments And Calibration

    Section 6. MFC-CB is covered by a limited one year warranty (see Section 7.5). Unauthorized service or repair during the warranty period is undertaken at the owner's risk and may cause damage that is NOT covered under product warranty and/or may void the product warranty.

  • Page 86: Verification And Calibration Of Electrical Signals

    • 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.

  • Page 87: Front Panel Adjustment Of Electrical Signals

    A new MFC-CB is delivered with all calibration adder and multiplier values set to zero (0) and one (1) respectively. This does NOT mean that the MFC-CB has NOT been calibrated. For the original factory calibration, privileged factory coefficients are used for calibration adjustment.

  • Page 88: 1Sense

    <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>,...

  • Page 89: 3Set

    <3SET> PURPOSE To view and adjust the device channel set command signal. See Sections 5.2.2.1 and 5.2.1 for information on MFC-CB device channel signal calibration. PRINCIPLE The device channel set value is entered by the operator locally using [SET MFC] (see Section 3.2.8) or by remote command.
  • Page 90 Use the set adder and multiplier to minimize this value. In normal MFC-CB operation, the actual set value may be modified by a K factor and/or adjustment factors in addition to the calibration coefficients (see Section 7.1).

  • Page 91: 4Valve

    See Section 5.2.1 for an explanation of adders and multipliers and their use in adjusting electrical settings and readings. 5.2.2.6 <5CAL DATE> PURPOSE To view and edit the calibration date for the MFC-CB device channel. OPERATION Press [SPECIAL] and select <4cal>. After selecting the device channel, select <5date>. The date format is YYYYMMDD.

  • Page 92: Reloading Embedded Software Into Flash Memory

    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”...

  • Page 93: Troubleshooting

    MFC-CB operation. This troubleshooting guide is intended as an aid in identifying the cause of unexpected MFC-CB behavior and determining whether the behavior is due to normal operation or an internal or external problem.
  • Page 94 MFC-CB™ Operation and Maintenance Manual Table 12. Troubleshooting Checklist (Continued) SYMPTOM PROBABLE CAUSE SOLUTION Bottom line of display has The DISPLAY function has been Use [DISPLAY] to set bottom line to changed and you want to change used to change the display.

  • Page 95: Appendix

    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).

  • Page 96: Converting Between Electrical Units And Flow Or %Fs Units

    CONVERTING BETWEEN ELECTRICAL UNITS AND FLOW OR %FS UNITS MFC-CB sets and reads electrical values to and from an MFC or MFM. When a custom MFC profile is in use (see Section 3.3.1), a flow unit and range are specified in addition to the electrical unit and range.

  • Page 97: Device Channel Connectors And Cables

    − 7.2 DEVICE CHANNEL CONNECTORS AND CABLES Use Table 13 to wire the interfacing cable required to connect an MFC-CB DEV1 or DEV2 connector to an MFC or MFM. Section 7.2.1 provides information on some common MFC cable setups. Table 13. MFC-CB DEV1 and DEV2 Connector Pin Out...
  • Page 98 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 SIGNAL DESCRIPTION Valve Test Used for direct measurement of the MFC internal valve voltage. Not available on all MFCs.

  • Page 99: Popular Configurations

    MFC Set point (+) A (B1) MFC Set point (-) B (B2) MFC Measure (-) C (B3) Valve Test Common F (Optional) (B6) -15 Volts F (B6) Set Point Sense (+) A (B1) Page 91 ©2001~2007 DH Instruments, a Fluke Company...

  • Page 100: Drivers

    A (B1) 7.3 DRIVERS The MFC-CB drivers option provides eight open collector drivers for operating external valves, solenoids, indicators, etc. When operating from the setup-driver screen (see Section 3.2.7), pressing [ENTER] allows the operating mode of the drivers to be set. The two modes of operation are Momentary and Toggle.

  • Page 101: Table 17. External Drivers

    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.

  • Page 102: Glossary

    User Level Level of security that can be set to prevent access to certain MFC-CB functions. Page 94 ©2001~2007 DH Instruments, a Fluke Company...

  • Page 103: Warranty Statement

    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.
  • Page 104 MFC-CB™ Operation and Maintenance Manual Page 96 ©2001~2007 DH Instruments, a Fluke Company...

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