Fluke 787B Operating Manual

August 2002, Rev. 4, 1/17
© 2002-2017 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
789/787B
ProcessMeter™

Users Manual

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. To obtain service during the warranty period, contact your nearest Fluke authoriz ed service center to obtain return authoriza­tion information, then send the product to that Service Center with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the exclusion or limitation of an implied warranty or of incidental or consequ ential damages, this limitation of liability may not apply to you.
Fluke Corporation P.O. Box 9090 Everett, WA 98206-9090 U.S.A.
11/99
Fluke Europe B.V. P.O. Box 1186 5602 BD Eindhoven The Netherlands

Table of Contents

Title Page
Introduction .................................................................................................................... 1
How to Contact Fluke ..................................................................................................... 2
Safety Information .......................................................................................................... 2
How to Get Started ......................................................................................................... 6
Getting Acquainted with the Meter ................................................................................. 7
Measuring Electrical Parameters .................................................................................... 18
Input Impedance ........................................................................................................ 18
Ranges ...................................................................................................................... 18
Testing Diodes ........................................................................................................... 18
Displaying Minimum, Maximum, and Average ........................................................... 19
Using AutoHold .......................................................................................................... 19
Compensating for Test Lead Resistance ................................................................... 20
Using the Current Output Functions ............................................................................... 20
Source Mode ............................................................................................................. 20
Simulate Mode ........................................................................................................... 22
Producing a Steady mA Output ................................................................................. 24
Manually Stepping the mA Output ............................................................................. 25
Auto Ramping the mA Output .................................................................................... 26
i
789/787B
Users Manual
Power-Up Options ......................................................................................................... 26
Loop Power Supply Mode (789 only) ............................................................................. 28
Battery Life ..................................................................................................................... 30
Maintenance .................................................................................................................. 30
Calibration ................................................................................................................. 31
Replacing the Batteries ............................................................................................. 31
Replacing a Fuse ...................................................................................................... 33
If the Meter does not Work ........................................................................................ 34
Replacement Parts and Accessories ............................................................................. 34
Specifications ................................................................................................................. 38
ii
ProcessMeter

Introduction

Warning
Read “Safety Information” before using the meter.
The Fluke 789/787B ProcessMeter (the Meter or Product) is a handheld, battery-operated tool for measuring electrical parameters and supplying steady or ramping current to test process instruments. All illustrations in this manual show the 789 model.
The 789 adds a 24 V loop power supply. 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. Contact a Fluke distributor for information about DMM (digital multimeter) accessories. To order replacement parts or spares, see Table 13 near the end of this manual.
1
789/787B
Users Manual

How to Contact Fluke

To contact Fluke, call one of the following telephone numbers:
Technical Support USA: 1-800-44-FLUKE (1-800-443-5853)
Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: +31 402-675-200
Japan: +81-3-6714-3114
Singapore: +65-6799-5566
Anywhere in the world: +1-425-446-5500
Or, visit Fluke's website at www.fluke.com. 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.

Safety Information

A Warning identifies conditions and procedures that are dangerous to the user. A Caution identifies conditions and procedures that can cause damage to the Product or the equipment under test.
International symbols used on the meter and in this manual are explained in Table 1.
Warning
To prevent possible electrical shock, fire, or personal injury:
Read all safety information before you use the
Product.
Carefully read all instructions.
Do not alter the Product and use only as
specified, or the protection supplied by the Product can be compromised.
Remove the batteries if the Product is not
used for an extended period of time, or if stored in temperatures above 50 °C. If the batteries are not removed, battery leakage can damage the Product.
2
ProcessMeter™
Safety Information
The battery door must be closed and locked
before you operate the Product.
Replace the batteries when the low battery
indicator shows to prevent incorrect measurements.
Comply with local and national safety codes.
Use personal protective equipment (approved rubber gloves, face protection, and flame­resistant clothes) to prevent shock and arc blast injury where hazardous live conductors are exposed.
Do not apply more than the rated voltage,
between the terminals or between each terminal and earth ground.
Do not work alone.
Limit operation to the specified measurement
category, voltage, or amperage ratings.
Use Product-approved measurement category
(CAT), voltage, and amperage rated accessories (probes, test leads, and adapters) for all measurements.
Measure a known voltage first to make sure
that the Product operates correctly.
Use the correct terminals, function, and range
for measurements.
Do not touch voltages > 30 V ac rms, 42 V ac
peak, or 60 V dc.
Do not use the Product around explosive gas,
vapor, or in damp or wet environments.
Do not use the Product if it operates
incorrectly.
Examine the case before you use the Product.
Look for cracks or missing plastic. Carefully look at the insulation around the terminals.
Do not use test leads if they are damaged.
Examine the test leads for damaged insulation, exposed metal, or if the wear indicator shows. Check test lead continuity.
3
789/787B
Users Manual
Keep fingers behind the finger guards on the
probes.
Only use probes, test leads, and accessories
that have the same measurement category, voltage, and amperage ratings as the Product.
Remove all probes, test leads, and
accessories before the battery door is opened.
Remove all probes, test leads, and
accessories that are not necessary for the measurement.
Do not exceed the Measurement Category
(CAT) rating of the lowest rated individual component of a Product, probe, or accessory.
Do not use test leads if they are damaged.
Examine the test leads for damaged insulation and measure a known voltage.
Do not use a current measurement as an
indication that a circuit is safe to touch. A voltage measurement is necessary to know if a circuit is hazardous.
Do not use the Product if it is altered or
damaged.
Do not use in CAT III or CAT IV environments
without the protective cap installed on test probe. The protective cap decreases the exposed probe metal to <4 mm. This decreases the possibility of arc flash from short circuits.
4
ProcessMeter™
Safety Information
Table 1. International Symbols
Symbol Description Symbol Description
 
5
WARNING. RISK OF DANGER.
Consult user documentation.
Conforms to European Union directives Certified by CSA Group to North American safety
standards. AC (Alternating Current)
DC (Direct Current) Battery
Measurement Category II is applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage MAINS installation.
Measurement Category III is applicable to test and measuring circuits connected to the distribution part of the building’s low-voltage MAINS installation.
Measurement Category IV is applicable to test and measuring circuits connected at the source of the building’s low-voltage MAINS installation.
This product complies with the WEEE Directive marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste.
WARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
Conforms to relevant South Korean EMC Standards
Minimum fuse interrupt rating. Conforms to relevant Australian Safety and
EMC standards. Earth
Fuse Double Insulated
789/787B
Users Manual

How to Get Started

Warning
To prevent possible electrical shock, fire, or personal injury:
Disconnect power and discharge all high-
voltage capacitors before you measure resistance, continuity, capacitance, or a diode junction.
Remove circuit power before you connect the
Product in the circuit when you measure current. Connect the Product in series with the circuit.
Do not use the HOLD function to measure
unknown potentials. When HOLD is turned on, the display does not change when a different potential is measured.
If 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 the meter.
If unfamiliar with Fluke 80 Series DMMs, or DMMs in general, read “Measuring Electrical Parameters” in addition to the sections referenced in the previous paragraph.
The sections following “Using the Current Output Functions” contain information about the power-up options, and battery and fuse replacement instructions.
See Table 2 for an overview of the meter.
6
ProcessMeter™
Getting Acquainted with the Meter
Table 2. 789/787B ProcessMeter
1
3
2
0%
4
anw014f.eps
Item Description
Display Rotary switch Pushbuttons Input/Output jacks

Getting Acquainted with the Meter

To become familiar with the features and functions of the meter, study these tables:
Table 3 describes the input/output jacks.
Table 4 describes the input functions of the first six
rotary function switch positions.
Table 5 describes the output functions of the last three rotary function switch positions.
Table 6 describes the functions of the pushbuttons.
Table 7 explains what all the elements of the display
indicate.
7
789/787B
Users Manual
Table 3. Input/Output Jacks
1
A
mA
2
COM
V
4
3
anw001f.eps
Item Jack Measurement Functions Source Current Function Simulate Transmitter Function
A c
mA d
V
Input for current to 440 mA continuous. (1 A for up to 30 seconds.) Fused with a 440 mA fuse.
Input for current to 30 mA. Fused with a 440 mA fuse.
Input for voltage to 1000 V, Ω, continuity, and diode test.
Output for dc current to 24 mA. Output for loop power supply (789 only).
Common for dc current output to 24 mA. Common for loop power supply.
Output for transmitter simulation to 24 mA. (Use in series with an external loop supply.)
Common for transmitter simulation
COM Common for all measurements.
to 24 mA. (Use in series with an external loop supply.)
8
ProcessMeter™
Getting Acquainted with the Meter
Table 4. Rotary Function Switch Positions for Measurements
4
3
2
1
No. Position Function(s) Pushbutton Actions
OFF
S
Meter off Default:
Measure ac V
h
Frequency counter
M Selects a MIN, MAX, or AVG action R Selects a fixed range (hold 1 second for auto range) H Toggles AutoHold
5
6
r Toggles relative reading (sets a relative zero point)
anw002f.eps
9
789/787B
Users Manual
No. Position Function(s) Pushbutton Actions
T
U
V
W
Table 4. Rotary Function Switch Positions for Measurements (cont.)
Default: Measure dc V
Same as above
h
Frequency counter Default: Measure dc mV
Same as above (mV has only one range)
h
Frequency counter Default: Measure Ω
Same as above (diode test has only one range)
G for continuity
J (Blue) D test
High test lead in cA: Measure A dc
J (Blue) selects ac High test lead in dmA:
Measure mA dc
Same as above (only one range for each input jack position, 30 mA or 1 A)
10
ProcessMeter™
Getting Acquainted with the Meter
Table 5. Rotary Function Switch Positions for mA Output
1
2
3
No. Position Default Function Pushbutton Actions
% STEP X or W: Adjusts output up or down to the next 25 % step
COARSE X or W: Adjusts output up or down 0.1 mA FINE X or W: Adjusts output up or down 0.001 mA
sets output to 0 % sets output to 100 %
OUTPUT
X
Test leads in SOURCE:
Source 0 % mA
Test leads in SIMULATE:
Sink 0 % mA
anw008f.eps
11
Loading...
+ 35 hidden pages