Fluke 789 User manual

®
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.

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. Resellers are not authorized to extend any other warranty on Fluke’s behalf.
To obtain service during the warranty period, contact your nearest Fluke authorized service center to obtain return authoriza-
tion 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 consequential damages, this limitation of
liability may not apply to you.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99

i
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.......................................................... 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

789
Users Manual
ii
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.............................................................................. 35
Specifications................................................................................................................. 39

iii
List of Tables
Table Title Page
1. International Symbols ........................................................................................................... 4
2. Input/Output Jacks................................................................................................................ 7
3. Rotary Function Switch Positions for Measurements............................................................ 9
4. Rotary Function Switch Positions for mA Output.................................................................. 11
5. Rotary Function Switch Position for Loop Supply................................................................. 11
6. Pushbuttons.......................................................................................................................... 13
7. Display.................................................................................................................................. 16
8. mA Output Adjust Pushbuttons............................................................................................. 25
9. mA Stepping Pushbuttons .................................................................................................... 26
10. mA Step Values.................................................................................................................... 26
11. Power-Up Options................................................................................................................. 28
12. Typical Alkaline Battery Life.................................................................................................. 31

789
Users Manual
iv

v
List of Figures
Figure Title Page
1. Fluke 789 ProcessMeter....................................................................................................... 5
2. Input/Output Jacks................................................................................................................ 6
3. Rotary Function Switch Positions for Measurements............................................................ 8
4. Rotary Function Switch Positions for mA Output.................................................................. 10
5. Pushbuttons.......................................................................................................................... 12
6. Elements of the Display........................................................................................................ 15
7. Sourcing Current................................................................................................................... 21
8. Simulating a Transmitter....................................................................................................... 23
9. Loop Power Voltage vs. Current........................................................................................... 29
10. Connections for Supplying Loop Power................................................................................ 30
11. Replacing the Batteries and Fuses....................................................................................... 33
12. Replacement Parts ............................................................................................................... 36

789
Users Manual
vi

1
ProcessMeter
Introduction
WWarning
Read “Safety Information” before using the
meter.
The Fluke 789 ProcessMeter(referred to as “the meter”)
is a handheld, battery-operated tool for measuring
electrical parameters, supplying steady or ramping current
to test process instruments, and providing 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.
Contacting Fluke
To order accessories, receive operating assistance, or get
the location of the nearest Fluke distributor or Service
Center, call:
USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: [phone]
Japan: [phone]
Singapore: [phone]
Anywhere in the world: [phone]

789
Users Manual
2
Address correspondence to:
Fluke Corporation Fluke Europe B.V.
P.O. Box 9090, P.O. Box 1186,
Everett, WA 98206-9090 5602 BD Eindhoven
USA The Netherlands
Orvisit uson the World Wide Web: www.fluke.com
Safety Information
The meter complies with EN61010, ANSI/ISA S82.01-
1994 and CAN/CSA C22.2 No. 1010.1-92 Overvoltage
Category III. Use the meter only as specified in this
manual, otherwise the protection provided by the meter
may be impaired.
A Warning identifies conditions and actions that pose
hazard(s) to the user; a Caution identifies conditions and
actions that may damage the meter or the equipment
under test.
International symbols used on the meter and in this
manual are explained in Table 1.
WWarning
To avoid possible electric shock or personal
injury:
•Do not use the meter if it is damaged.
Before using the meter, inspect the case.
Look for cracks or missing plastic. Pay
particular attention to the insulation
surrounding the connectors.
•Make sure the battery door is closed and
latched before operating the meter.
•Remove test leads from the meter before
opening the battery door.
•Inspect the test leads for damaged
insulation or exposed metal. Check test
lead continuity. Replace damaged test
leads before using the meter.
•Do not use the meter if it operates
abnormally. Protection may be impaired.
When in doubt, have the meter serviced.
•Do not operate the meter around
explosive gas, vapor, or dust.
•Use only type AA batteries, properly
installed in the meter case, to power the
meter.