Fluke ProcessMeter 789 User Manual
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Fluke ProcessMeter 789 User Manual

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®
789
ProcessMeter
Users Manual
August 2002 Rev.1, 2/03
© 2002-2003 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.

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Summary of Contents for Fluke ProcessMeter 789

  • Page 1 ® ProcessMeter Users Manual August 2002 Rev.1, 2/03 © 2002-2003 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.
  • Page 2 LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for three years from the date of purchase. This war- ranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling.

  • Page 3: Table Of Contents

    Table of Contents Title Page Introduction ........................1 Contacting Fluke......................1 Safety Information......................2 How to Get Started ......................5 Getting Acquainted with the Meter................. 6 Measuring Electrical Parameters ................... 18 Input Impedance ....................... 18 Ranges........................18 Testing Diodes ......................18 Displaying Minimum, Maximum, and Average ............
  • Page 4 Users Manual Auto Ramping the mA Output..................26 Power-Up Options ......................27 Loop Power Supply Mode ....................29 Battery Life ........................31 Maintenance........................31 General Maintenance ..................... 31 Calibration ......................... 31 Replacing a Fuse....................... 34 If the Meter does not Work ..................34 Replacement Parts and Accessories................
  • Page 5 List of Tables Table Title Page International Symbols ......................4 Input/Output Jacks ........................ 7 Rotary Function Switch Positions for Measurements............9 Rotary Function Switch Positions for mA Output ..............11 Rotary Function Switch Position for Loop Supply ..............11 Pushbuttons .......................... 13 Display ..........................
  • Page 6 Users Manual...

  • Page 7: List Of Figures

    List of Figures Figure Title Page Fluke 789 ProcessMeter ....................... 5 Input/Output Jacks ........................ 6 Rotary Function Switch Positions for Measurements............8 Rotary Function Switch Positions for mA Output ..............10 Pushbuttons .......................... 12 Elements of the Display ......................15 Sourcing Current........................
  • Page 8 Users Manual...

  • Page 9: Introduction

    To order accessories, receive operating assistance, or get electrical parameters, supplying steady or ramping current the location of the nearest Fluke distributor or Service to test process instruments, and providing a > 24 V loop Center, call: power supply.

  • Page 10: Safety Information

    Users Manual WWarning Address correspondence to: Fluke Corporation Fluke Europe B.V. To avoid possible electric shock or personal P.O. Box 9090, P.O. Box 1186, injury: Everett, WA 98206-9090 5602 BD Eindhoven Do not use the meter if it is damaged.
  • Page 11 ProcessMeter Safety Information WCaution When servicing the meter, use only specified replacement parts. To avoid possible damage to meter or to equipment under test: Use caution when working above 30 V ac rms, 42 V ac pk, or 60 V dc. Such Disconnect the power and discharge all voltages pose a shock hazard.

  • Page 12: International Symbols

    Users Manual Table 1. International Symbols Symbol Meaning Symbol Meaning Alternating current Earth ground Direct current Fuse Alternating or direct current Conforms to European Union directives Risk of danger. Important information. Conforms to relevant Canadian See manual. Standards Association directives Battery Double insulated Meets Underwriters’...

  • Page 13: How To Get Started

    ProcessMeter How to Get Started How to Get Started Display If familiar with the Fluke 80 Series DMM, read “Using the PROCESSMETER Current Output Functions,” review the tables and figures in “Getting Acquainted with the Meter,” and begin using the meter.

  • Page 14: Getting Acquainted With The Meter

    Users Manual Getting Acquainted with the Meter Figure 4 and Tables 4 and 5 describe the output functions of the last three rotary function switch To become familiar with the features and functions of the positions. meter, study the following figures and tables. Figure 5 and Table 6 describe the functions of the Figure 2 and Table 2 describe the input/output jacks.

  • Page 15: Input/Output Jacks

    ProcessMeter Getting Acquainted with the Meter Table 2. Input/Output Jacks Source Current Simulate Transmitter Item Jack Measurement Functions Function Function Input for current to 440 mA Output for dc current to 24 mA. continuous. (1 A for up to 30 Output for loop power supply.
  • Page 16 Users Manual HART LOOP POWER anw002f.eps Figure 3. Rotary Function Switch Positions for Measurements...

  • Page 17: Rotary Function Switch Positions For Measurements

    ProcessMeter Getting Acquainted with the Meter Table 3. Rotary Function Switch Positions for Measurements Position Function(s) Pushbutton Actions Meter off Default: Selects a MIN, MAX, or AVG action Measure ac V Selects a fixed range (hold 1 second for auto range) Toggles AutoHold Frequency counter Toggles relative reading (sets a relative zero point)
  • Page 18 Users Manual HART LOOP POWER anw008f.eps Figure 4. Rotary Function Switch Positions for mA Output...

  • Page 19: Rotary Function Switch Positions For Ma Output

    ProcessMeter Getting Acquainted with the Meter Table 4. Rotary Function Switch Positions for mA Output Position Default Function Pushbutton Actions % STEP X or W: Adjusts output up or down to the next 25 % step Test leads in OUTPUT SOURCE: COARSE X or W: Adjusts output up or down 0.1 mA Source 0 % mA...
  • Page 20 Users Manual RANGE HOLD 100% MIN MAX COARSE FINE SpanCheck %STEP anw003f.eps Figure 5. Pushbuttons...

  • Page 21: Pushbuttons

    ProcessMeter Getting Acquainted with the Meter Table 6. Pushbuttons Pushbutton Function(s) Toggles the backlight (low, high, and off) mA Output: Adjusts mA output to 0 % value (4 mA or 0 mA) Span Check mA Output: Sets mA output to 100 % value (20 mA) Span Check Measuring: Selects a MIN, MAX, or AVG action mA Output: Adjusts mA output up to the next higher 25 % step...
  • Page 22 Users Manual Table 6. Pushbuttons (cont.) Pushbutton Function(s) Measuring: Toggles between frequency counter and voltage measurement functions FINE mA Output: Adjusts output down 0.001 mA Rotary function switch in position and test lead plugged into Ac jack: Toggles between (BLUE) ac and dc ampere measure (alternate Rotary function switch in...
  • Page 23 ProcessMeter Getting Acquainted with the Meter anw004f.eps Figure 6. Elements of the Display...

  • Page 24: Display

    Users Manual Table 7. Display Element Meaning Shows the mA measured value or output level in %, in a 0-20 mA or 4-20 mA scale % (Percentage display) (change scales with power-up option) Lights when mA output (source or simulate) is active OUTPUT Lights in continuity function Lights when dangerous voltage is present...
  • Page 25 ProcessMeter Getting Acquainted with the Meter Table 7. Display (cont.) Meaning Element Show the input or output units and multipliers associated with the numerals mA, DC, mV, AC, M or k , kHz Range status indicators: Auto Range Auto Range - autoranging is on Manual Range Manual Range - the range is fixed The number plus the unit and multiplier indicate the active range.

  • Page 26: Measuring Electrical Parameters

    Users Manual Measuring Electrical Parameters The meter normally selects the lowest range that will measure the applied input signal (Auto Range showing on the display). Press R to lock the range. Each time The proper sequence for taking measurements follows: R is pressed, the meter selects the next higher range.

  • Page 27: Displaying Minimum, Maximum, And Average

    ProcessMeter Measuring Electrical Parameters The diode is good if it passes the tests in steps 4 Using AutoHold and 5. Note Displaying Minimum, Maximum, and Average MIN MAX recording must be off to use AutoHold. MIN MAX recording stores the lowest and highest measurements, and maintains the average of all ! Warning measurements.

  • Page 28: Compensating For Test Lead Resistance

    Users Manual Compensating for Test Lead Resistance current in an externally powered current loop, or loop supply mode, where the meter powers an external device Use the relative reading feature (Q on the display) to set and measures the loop current. the present measurement as a relative zero.
  • Page 29 ProcessMeter Using the Current Output Functions PROCESSMETER 100% MIN MAX RANGE HOLD SpanCheck %STEP COARSE FINE HART LOOP POWER anw010f.eps Figure 7. Sourcing Current...

  • Page 30: Simulate Mode

    Users Manual Changing the Current Span Simulate Mode Simulate mode is so named because the meter simulates The meter’s current output span has two settings (with a current loop transmitter. Use simulate mode when an overrange to 24 mA): external dc voltage of 15 to 48 V is in series with the 4 mA = 0 %, 20 mA = 100 % (factory default) current loop under test.

  • Page 31: Simulating A Transmitter

    ProcessMeter Using the Current Output Functions dc V Power Supply PROCESSMETER +24V 100% MIN MAX RANGE HOLD SpanCheck %STEP COARSE FINE HART LOOP POWER anw011f.eps Figure 8. Simulating a Transmitter...

  • Page 32: Producing A Steady Ma Output

    Users Manual If the meter cannot deliver the programmed current Producing a Steady mA Output because the load resistance is too high or the loop supply When the rotary function switch is in the OUTPUT [ mA voltage is too low, dashes (-----) appear on the numeric position, and the OUTPUT jacks are connected to an display.

  • Page 33: Manually Stepping The Ma Output

    ProcessMeter Using the Current Output Functions Table 8. mA Output Adjust Pushbuttons Manually Stepping the mA Output When the rotary function switch is in the OUTPUT [ mA Pushbutton Adjustment position, and the OUTPUT jacks are connected to an appropriate load, the meter produces a steady mA dc Adjusts up 0.1 mA output.

  • Page 34: Auto Ramping The Ma Output

    Users Manual Table 9. mA Stepping Pushbuttons Table 10. mA Step Values Value (for each span setting) Pushbutton Adjustment Step 4 to 20 mA 0 to 20 mA Adjusts up to the next higher 25 % step 4.000 mA 0.000 mA % STEP 25 % 8.000 mA...

  • Page 35: Power-Up Options

    ProcessMeter Power-Up Options When the rotary function switch is in the OUTPUT Power-Up Options monp position, and the output jacks are To select a power-up option, hold down the pushbutton connected to an appropriate load, the meter produces a shown in Table 11 while turning the rotary function switch continuously repeating 0 % - 100 % - 0 % ramp in a from OFF to any on position.

  • Page 36: Power-Up Options

    Users Manual Table 11. Power-Up Options Option Pushbutton Default Action Taken Change current span 0 % setting Remembers Toggles between 0 - 20 mA and 4 - 20 mA last setting range Disable beeper Enabled Disables beeper Disable auto power-off Enabled Disables the feature that turns off the meter (Blue)

  • Page 37: Loop Power Supply Mode

    ProcessMeter Loop Power Supply Mode Loop Power Supply Mode The Loop Power Supply Mode can be used for powering up a process instrument (transmitter). While in Loop Power Mode, the meter acts like a battery. The process instrument regulates the current. At the same time, the meter measures the current that the process instrument is drawing.
  • Page 38 Users Manual PROCESSMETER 100% MIN MAX RANGE HOLD SpanCheck %STEP COARSE FINE TEST DC PWR – + – – HART LOOP POWER Black anw009f.eps Figure 10. Connections for Supplying Loop Power...

  • Page 39: Battery Life

    Avoid using the backlight. Calibrate the meter once a year to ensure that it performs Do not disable the automatic power-off feature. according to its specifications. Contact a Fluke Service Turn the meter off when not in use. Center for instructions.
  • Page 40 Users Manual Replacing the Batteries With a standard blade hand screwdriver, turn each battery door screw counterclockwise so that the slot is ! Warning parallel with the screw picture molded into the case. To avoid electrical shock: Lift off the battery door. Remove test leads from the meter before Remove the meter’s batteries.
  • Page 41 ProcessMeter General Maintenance anw037.eps Figure 11. Replacing the Batteries and Fuses...

  • Page 42: Replacing A Fuse

    OFF. meter, use only the specified replacement With a standard blade hand screwdriver, turn each fuse, 440 mA 1000 V fast-blow, Fluke PN battery door screw counterclockwise so that the slot 943121. is parallel with the screw picture molded into the Both current input jacks are fused with separate case.

  • Page 43: Replacement Parts And Accessories

    ProcessMeter Replacement Parts and Accessories If the meter still does not work, contact a Fluke Service Replacement Parts and Accessories Center. If the meter is under warranty, it will be repaired ! Warning or replaced (at Fluke’s option) and returned at no charge.
  • Page 44 Users Manual anw005f.eps Figure 12. Replacement Parts...
  • Page 45 ProcessMeter Replacement Parts and Accessories Table 13. Replacement Parts Reference Item Number Designator Description Fluke PN or Model no. Quantity MP14 Knob Assembly 658440 Top Case with Lens Protector 1622855 Decal, Top Case 1623923 Keypad 1622951 Top Shield 1622924 MP47...
  • Page 46 Users Manual Table 13. Replacement Parts (continued) Reference Item Number Designator Description Fluke PN or Model no. Quantity MP50 Shock Absorber 878983 MP11 Bottom Case 659042 MP20 Battery Contact, Negative 658382 BT1-4 Battery, 1.5 V, 0-15 mA, AA Alkaline 376756...

  • Page 47: Specifications

    ProcessMeter Specifications The standard specification interval is 1 year. Specifications Note All specifications apply from +18 C to +28 C unless stated otherwise. “Counts” refers to the number of increments or decrements of the least significant digit. All specifications assume a 5-minute warm-up period. DC Volts Measurement Range (V dc) Resolution...
  • Page 48 Users Manual DC Millivolts Measurement Range (mV dc) Resolution Accuracy, (% of Reading + Counts) 400.0 0. 1 mV 0.1 % + 2 AC Volts Measurement Accuracy, (% of Reading + Counts) Range (ac) Resolution 50 Hz to 60 Hz 45 Hz to 200 Hz 200 Hz to 500 Hz 400.0 mV...
  • Page 49 ProcessMeter Specifications AC Current Measurement Range Typical Burden 45 Hz to 2 kHz Resolution Accuracy, (% of Reading + Counts) Voltage 1.000 A (Note) 0.001 A 1 % + 2 1.5 V/A Note: 440 mA continuous, 1 A 30 seconds maximum Specifications are valid from 5 % to 100 % of amplitude range.
  • Page 50 Users Manual Ohms Measurement Range Resolution Measurement Current Accuracy, (% of Reading + Counts) 400.0 0. 1 220 A 0.2 % + 2 4.000 k 0.001 k 60 A 0.2 % + 1 40.00 k 0.01 k 6.0 A 0.2 % + 1 400.0 k 0.1 k 600 nA...
  • Page 51 ProcessMeter Specifications Frequency Counter Accuracy Range Resolution Accuracy, (% of Reading + Counts) 199.99 Hz 0.01 Hz 0.005 % + 1 1999.9 Hz 0.1 Hz 0.005 % + 1 19.999 kHz 0.001 kHz 0.005 % + 1 Display updates 3 times/second at > 10 Hz Frequency Counter Sensitivity Minimum Sensitivity (rms Sinewave) 5 Hz to 5 kHz*...
  • Page 52 Users Manual Diode Test and Continuity Test Simulate Mode: Diode test indication: Displays voltage drop across Span: 0 mA or 4 mA to 20 mA, with overrange to 24 mA device, 2.0 V full scale. Nominal test current 0.2 mA at Accuracy: 0.05 % of span 0.6 V.
  • Page 53 ProcessMeter Specifications Accuracy adders for use in RF Fields: In an RF field of Certifications: 3 V/m, change the accuracy specifications as follows: Power requirements: Four AA batteries (alkaline For AC Volts Measurement, add 0.25 % of range recommended) For DC Current Measurement, 30.000 mA range, add 0.14 % or range Size: 10.0 cm X 20.3 cm X 5.0 cm (3.94 in X 8.00 in X For DC Current Output, add 0.32 % of span...
  • Page 54 Users Manual...

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