787 ProcessMeter™ Users Manual April 1997 Rev. 4, 3/13 © 1997-2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
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 warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf.
Table of Contents Title Introduction .................................................................................................................... Contacting Fluke ............................................................................................................ Safety Information .......................................................................................................... How to Get Started ......................................................................................
787 Users Manual Manually Stepping the mA Output ............................................................................ Auto Ramping the mA Output ................................................................................... Power-Up Options ......................................................................................................... Battery Life..................................................................................................................... Using the Holster ....
List of Tables Table Title Page 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Symbols................................................................................................................................. Input/Output Jacks................................................................................................................. Rotary Switch Positions for Measurements ........................................................................... Rotary Knob Positions for mA Output ..........
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List of Figures Figure Title Page 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Fluke 787 ProcessMeter........................................................................................................ Input/Output Jacks................................................................................................................. Rotary Switch Positions for Measurements ........................................................................... Rotary Switch Positions for mA Output.....................
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Introduction Contacting Fluke Warning Read “Safety Information” before you use the Meter. Your Fluke 787 ProcessMeter (referred to as “the Product or Meter”) is a handheld, battery-operated tool for measuring electrical parameters and supplying steady or ramping current to test process instruments. It has all the features of a digital multimeter, plus current output capability. If the Meter is damaged or something is missing, contact the place of purchase immediately.
787 Users Manual • Do not use the Meter if it is damaged. Before you use the Meter, inspect the case. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors. To register your product, visit http://register.fluke.com. • To view, print, or download the latest manual supplement, visit http://us.fluke.com/usen/support/manuals. Make sure the battery door is closed and latched before operating the Meter.
ProcessMeter™ Safety Information • Before a current measurement, do the fuse test. • Remove test leads from the Meter before you open the battery door. • Use the correct terminals, function, and range for measurements. • Close and latch the battery door before using the Meter. • Do not work alone. • • For current measurements, connect the Meter to the circuit after you remove circuit power. Always put the Meter in series with the circuit.
787 Users Manual Caution To prevent possible damage to Product or to equipment under test: 4 • Disconnect the power and discharge all high-voltage capacitors before testing resistance or continuity. • Use the proper jacks, function, and range for your measurement or sourcing application. • For best mechanical performance, the Product must remain in the holster at all times. To protect yourself, adhere to the following guidelines: • Use caution when working above 30V ac rms, 42V ac pk, or 60V dc.
ProcessMeter™ Safety Information Table 1. Symbols Symbol CAT II CAT III CAT IV Meaning Risk of Danger. Important information. See Manual. AC (Alternating Current) Symbol Meaning Earth ground DC (Direct Current) Conforms to European Union directives Conforms to relevant North American Safety Standards. Alternating or direct current Battery Inspected and licensed by TÜV Product Services Meets Underwriters’ Laboratories safety requirements Hazardous voltage.
787 Users Manual How to Get Started If you are familiar with the Fluke 80 Series DMM, read “Using the Current Output Functions,” review the tables and figures in “Getting Acquainted with the Meter,” and begin using your Meter. If you are unfamiliar with Fluke 80 Series DMMs, or DMMs in general, read “Measuring Electrical Parameters” in addition to the sections referenced in the previous paragraph.
ProcessMeter™ Getting Acquainted with the Meter Getting Acquainted with the Meter • To become familiar with the features and functions of the Meter, study the following figures and tables. Figure and Table 4 describe the output functions you get with the last two rotary switch positions. • Figure and Table 5 describe the functions of the pushbuttons. • Figure and Table 6 explain what all the elements of the display indicate. • Figure and Table 2 describe the input/output jacks.
787 Users Manual Table 2. Input/Output Jacks Item 8 Jack Measurement Functions Source Current Function cA Input for current to 440 mA continuous. (1A for up to 30 seconds.) Fused with a 440 mA fuse. Output for dc current to 24 mA. d mA Input for current to 30 mA. Fused with a 440 mA fuse. Common for dc current output to 24 mA. V Input for voltage to 1000V, Ω, continuity, and diode test. COM Common for all measurements.
ProcessMeter™ Getting Acquainted with the Meter 5 4 6 3 mV mA A OUTPUT V V mA mA 2 OFF 1 ee002f.eps Figure 3.
787 Users Manual Table 3. Rotary Switch Positions for Measurements No. Position Function(s) Pushbutton Actions OFF Meter off VA Default: measure ac V F Frequency counter M Selects a MIN, MAX, or AVG action (see pg.
ProcessMeter™ Getting Acquainted with the Meter mV mA A OUTPUT V V 1 mA mA OFF 2 ee008.eps Figure 4.
787 Users Manual Table 4. Rotary Switch Positions for mA Output No. Position Default Function Pushbutton Actions OUTPUT Test leads in SOURCE: % STEP X or W: Adjusts output up or down to the next 25 % step [ mA Source 0 % mA COARSE Z or Y: Adjusts output up or down 0.1 mA Test leads in SIMULATE: FINE X or W: Adjusts output up or down 0.
ProcessMeter™ Getting Acquainted with the Meter 2 4 3 MIN MAX RANGE HOLD H % STEP COARSE FINE REL 1 5 Hz 8 7 6 ee003f.eps Figure 5. Pushbuttons Table 5. Pushbuttons No.
787 Users Manual Table 5. Pushbuttons (cont.) No. Pushbutton X M Function(s) Measuring: Selects a MIN, MAX, or AVG action (see pg. 18) mA Output: Adjusts mA output up to the next higher 25% step % STEP Z K Measuring: Selects a fixed range (hold for 1 second for auto range) mA Output: Adjusts output up 0.1 mA COARSE X I Measuring: Toggles TouchHold, or in MIN MAX recording, suspends recording mA Output: Adjusts output up 0.
ProcessMeter™ Getting Acquainted with the Meter 6 7 9 8 5 4 10 3 2 11 1 12 ee004f.eps Figure 6.
787 Users Manual Table 6. Display No.
ProcessMeter™ Getting Acquainted with the Meter Table 6. Display (cont.) No. Element mA, DC, mV, AC, M or kΩ, kHz Auto 400100030 EP N Meaning Show the input or output units and multipliers associated with the numerals Range status indicators: Auto means autoranging is on. The number plus the unit and multiplier indicate the active range. One of these lights in mA ramping or step output (rotary switch position mA J): E means slow continuous 0% - 100% - 0% ramping.
787 Users Manual Measuring Electrical Parameters The proper sequence for taking measurements is as follows: 1. Plug the test leads into the appropriate jacks. 2. Set the rotary knob. 3. Touch the probes to the test points. Input Impedance For the voltage measurement functions, input impedance is 10 MΩ. See the specifications for more information. Ranges A measurement range determines the highest value the Meter can measure.
ProcessMeter™ Measuring Electrical Parameters Testing Diodes Displaying Minimum, Maximum, and Average To test a single diode: MIN MAX recording stores the lowest and highest measurements, and maintains the average of all measurements. 1. Insert the red test lead into the Vjack and black test lead into the COM jack. 2. Set the rotary switch to O. 3. Press the BLUE pushbutton so that the D symbol is on the display. 4.
787 Users Manual Compensating for Test Lead Resistance Using TouchHold Note You must have MIN MAX recording off to use TouchHold. ! Warning To avoid possible electric shock, do not use TouchHold to determine if dangerous voltage is present. TouchHold will not capture unstable or noisy readings. Activate TouchHold® if you want the Meter to freeze the display on each new stable reading (except in the frequency counter function). Press I to activate TouchHold.
ProcessMeter™ Using the Current Output Functions Using the Current Output Functions The Meter provides steady, stepped, and ramped current output for testing 0-20 mA and 4-20 mA current loops. You can choose source mode, in which the Meter supplies the current, or simulate mode, in which the Meter regulates current in an externally-powered current loop. current into a passive circuit such as a current loop with no loop supply.
787 Users Manual 787 PROCESSMETER MIN MAX RANGE HOLD H % STEP COARSE FINE REL Hz mA A mV OUTPUT mA V V mA OFF OUTPUT 0-24mA SOURCE + A 0.44A (1A /30 sec) FUSED SIMULATE + COM mA 30mA FUSED V CAT 1000V ee010f.eps Figure 7.
ProcessMeter™ Using the Current Output Functions Simulate Mode Changing the Current Span Simulate mode is so named because the Meter simulates a current loop transmitter. Use simulate mode when an external dc voltage of 24 to 30V is in series with the current loop under test. The Meter’s current output span has two settings (with overrange to 24 mA): Caution Set the rotary switch to one of the mA output settings BEFORE you connect the test leads to a current loop.
787 Users Manual dc V Power Supply 787 PROCESSMETER COM +24V MIN MAX RANGE HOLD H % STEP COARSE FINE REL Hz mA A mV OUTPUT mA V V mA OFF OUTPUT 0-24mA SOURCE + A 0.44A (1A /30 sec) FUSED SIMULATE + COM mA 30mA FUSED V CAT 1000V ee011f.eps Figure 8.
ProcessMeter™ Using the Current Output Functions Producing a Steady mA Output When the rotary switch is in the OUTPUT [ mA position, and the OUTPUT jacks are connected to an appropriate load, the Meter produces a steady mA dc output. The Meter begins sourcing or simulating 0%. Use the pushbuttons to adjust the current as shown in Table 8. Select either sourcing or simulating by choosing the SOURCE or SIMULATE output jacks.
787 Users Manual Manually Stepping the mA Output When the rotary switch is in the OUTPUT [ mA position, and the OUTPUT jacks are connected to an appropriate load, the Meter produces a steady mA dc output. The Meter begins sourcing or simulating 0 %. Use the pushbuttons to step the current up and down in 25 % steps as shown in Table 9. See Table 10 for mA values at each 25 % step. Select either sourcing or simulating by choosing the SOURCE or SIMULATE output jacks.
ProcessMeter™ Using the Current Output Functions Table 10. mA Step Values 4 to 20 mA 0 to 20 mA When the rotary switch is in the OUTPUT mA J position, the Meter produces a continuously repeating 0 % - 100 % - 0 % ramp in your choice of three ramp waveforms: 0% 4.000 mA 0.000 mA E 25 % 8.000 mA 5.000 mA 0 % - 100 % - 0 % 40-second smooth ramp, (default) 12.000 mA 10.000 mA P N 0 % - 100 % - 0 % 15-second smooth ramp 50 % 75 % 16.000 mA 15.000 mA 100 % 20.000 mA 20.000 mA 125 % 24.
787 Users Manual Power-Up Options To select a power-up option, hold down the pushbutton shown in Table 11 while turning the rotary switch from OFF to any on position. Wait 2 seconds before you release the pushbutton after powering up the Meter. The Meter beeps to acknowledge the power-up option. Only the setting for current span is retained when the power is turned off. The others have to be repeated for each operating session.
ProcessMeter™ Battery Life Battery Life Using the Holster Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator (B) appears. Table 12 shows typical alkaline battery life. To preserve battery life: • Use current simulation instead of sourcing when possible. • Avoid using the backlight. • Do not disable the automatic power-off feature. • Turn the Meter off when you are not using it.
787 Users Manual Maintenance This section provides some basic maintenance procedures. Repair, calibration, servicing not covered in this manual must be performed by qualified personnel. For maintenance procedures not described in this manual, contact a Fluke Service Center. Meter in holster face down for protection General Maintenance Periodically wipe the case with a damp cloth and detergent; do not use abrasives or solvents.
ProcessMeter™ Maintenance Remove test leads from the Meter before you open the battery door. Replace the battery as follows. Refer to Figure 10. Use an alkaline 9V battery, type ANSI/NEDA 1604A or IEC 6LR61. 1. Remove the test leads and set the rotary switch to OFF. 2. With a standard blade hand screwdriver, turn each battery door screw counterclockwise so that the slot is parallel with the screw picture molded into the case. 3. Lift off the battery door. ee007f.eps Figure 10.
787 Users Manual Replacing a Fuse ! Warning To avoid personal injury or damage to the Meter, use only the specified replacement fuse, 440 mA 1000V fast-blow, Fluke PN 943121. Both current input jacks are fused with a separate 440 mA fuse. To determine if a fuse is blown: If a fuse is blown, replace it as follows. Refer to Figure 11 as necessary: 1. Remove the test leads from the Meter and turn the rotary switch to OFF. 2. Remove the battery door. 3.
ProcessMeter™ Maintenance If the Meter does not Work • Examine the case for physical damage. If there is damage, make no further attempt to use the Meter, and contact a Fluke Service Center. • Check the battery, fuses, and test leads. • Review this manual to make sure you are using the correct jacks and rotary switch position. If the Meter still does not work, contact a Fluke Service Center. If the Meter is under warranty, it will be repaired or replaced (at Fluke’s option) and returned at no charge.
787 Users Manual Replacement Parts and Accessories ! Warning To avoid personal injury or damage to the Meter, use only the specified replacement fuse, 440 mA 1000V fast-blow, Fluke PN 943121. Note When servicing the Meter, use only the replacement parts specified here. 34 Replacement parts and some accessories are shown in Figure 12 and listed in Table 13. Many more DMM accessories are available from Fluke. For a catalog, contact your nearest Fluke distributor.
ProcessMeter™ Replacement Parts and Accessories Table 13. Replacement Parts Item Description Fluke PN or Model no.
787 Users Manual MP85 Holster MP103 S1 Tilt Stand F2 F1 MP8 MP86 H2, 3, 4 BT1 MP89, 90 CD-ROM (Users Manual) MP92 H5, 6 ee015c.eps Figure 12.
ProcessMeter™ Specifications The standard specification interval is 1 year. Specifications All specifications apply from +18°C to +28°C unless stated otherwise. All specifications assume a 5 minute warmup period. Note “Counts” means number of increments or decrements of the least significant digit. DC Volts Measurement Range (V dc) Resolution Accuracy, ±(% of Reading + Counts) 4.000 0.001 V 0.1 % + 1 40.00 0.01 V 0.1 % + 1 400.0 0.1 V 0.1 % + 1 1000 1V 0.
787 Users Manual DC Millivolts Measurement Range (mV dc) 400.0 Resolution Accuracy (% of Reading + Counts) 0.1 mV 0.1 % + 1 AC Volts Measurement Range (ac) Resolution Accuracy, ±(% of Reading + Counts) 50 Hz to 60 Hz 200 Hz to 500 Hz 400.0 mV 0.1 mV 0.7 % + 4 1.2 % + 4 7.0 % + 4 4.000 V 0.001 V 0.7 % + 2 1.2 % + 4 7.0 % + 4 40.00 V 0.01 V 0.7 % + 2 1.2 % + 4 7.0 % + 4 400.0 V 0.1 V 0.7 % + 2 1.2 % + 4 7.0 % + 4 1000 V 1V 0.7 % + 2 1.2 % + 4 7.
ProcessMeter™ Specifications AC Current Measurement Range 45 Hz to 2 kHz Resolution 1.000 A (Note) 0.001 A Accuracy, ±(% of Reading + Counts) 1%+2 Typical Burden Voltage 1.5 V/A Note: 440 mA continuous, 1 A 30 seconds maximum on, 5 minutes off Specifications are valid from 5 % to 100 % of amplitude range. AC conversion: true rms Maximum crest factor: 3 For non-sinusoidal waveforms, add ±(2 % reading + 2 % f.s.
787 Users Manual Ohms Measurement Range Resolution Accuracy, ±(% of Reading + Counts) 400.0 Ω 0.1 Ω 220 μA 0.2 % + 2 4.000 kΩ 0.001 kΩ 59 μA 0.2 % + 1 40.00 kΩ 0.01 kΩ 5.9 μA 0.2 % + 1 400.0 kΩ 0.1 kΩ 590 nA 0.2 % + 1 4.000 MΩ 0.001 MΩ 220 nA 0.35 % + 3 40.00 MΩ 0.01 MΩ 22 nA 2.5 % + 3 Overload protection: 1000 V Open circuit voltage: <3.
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 Input Range Minimum Sensitivity (rms Sinewave) 5 Hz to 5 kHz* 1V 0.1 V 4V 1V 40 V 3V 400 V 30 V 1000 V 300 V * Usable 0.5 Hz to 20 kHz with reduced sensitivity.
787 Users Manual Diode Test and Continuity Test DC Current Output Diode test indication: display voltage drop: 0.2 mA nominal test current at 0.6V: 2.4V full scale, accuracy ±(2% + 1 count) Source mode: Continuity test indication: continuous audible tone for test resistance <100 Ω Compliance voltage: 12 V with battery voltage >8.5 V Open circuit voltage: <3.9 V Short circuit current: 1.2 mA typical Overload protection: 1000 V rms Span: 0 mA or 4 mA to 20 mA, with overrange to 24 mA Accuracy: 0.
ProcessMeter™ Specifications General Specifications Maximum voltage applied between any jack and earth ground .................................... 1000 V Storage temperature ............................................. -40 °C to 60 °C Operating temperature .......................................... -20 °C to 55 °C Operating altitude .................................................. 2000 meters maximum Temperature coefficient ........................................ 0.
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