1 789. ProcessMeter . Users Manual August 2002 Rev. 3, 3/13. 2002-2013 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 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.
2 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 Fluke Europe Box 9090 Box 1186. Everett, WA 98206-9090 5602 BD Eindhoven The Netherlands 11/99. Table of Contents Title Page Introduction .. 1. How to Contact Fluke .. 1. Safety Information .. 2. How to Get Started .. 5. Getting Acquainted with the Meter .. 6. Measuring Electrical 18. Input Impedance .. 18. Ranges .. 18. Testing 18. Displaying Minimum, Maximum, and Average .. 19. Using 19. Compensating for Test Lead Resistance .. 20. Using the Current Output Functions.
3 20. Source Mode .. 20. Simulate 22. Producing a Steady mA Output .. 24. Manually Stepping the mA Output .. 25. Auto Ramping the mA Output .. 26. i 789. Users Manual Power-Up Options .. 27. Loop Power Supply Mode .. 29. Battery 31. Maintenance .. 31. General 31. Calibration .. 31. Replacing a Fuse .. 34. If the Meter does not Work .. 34. Replacement Parts and Accessories .. 35. Specifications .. 39. ii List of Tables Table Title Page 1. International Symbols .. 4. 2. Input/Output 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. 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. 13. Replacement Parts.
4 37. iii 789. Users Manual iv List of Figures Figure Title Page 1. Fluke 789 5. 2. Input/Output 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 23. 9. Loop Power Voltage vs. Current .. 29. 10. Connections for Supplying Loop 30. 11. Replacing the Batteries and Fuses .. 33. 12. Replacement Parts .. 36. v 789. Users Manual vi ProcessMeter . Introduction How to Contact Fluke Warning To contact Fluke , call one of the following telephone numbers: Read Safety Information before using the meter. Technical Support USA: 1-800-44- Fluke (1-800-443- 5853). The Fluke 789 ProcessMeter (referred to as the meter ). Calibration/Repair USA: 1-888-99- Fluke (1-888-993- is a handheld, battery-operated tool for measuring electrical parameters, supplying steady or ramping current 5853).
5 To test process instruments, and providing a > 24 V loop Canada: 1-800-36- Fluke (1-800-363-5853). power supply. It has all the features of a digital multimeter, Europe: +31 402-675-200. plus current output capability. Japan: +81-3-6714-3114. If the meter is damaged or something is missing, contact Singapore: +65-6799-5566. the place of purchase immediately. Contact a Fluke Anywhere in the world: +1-425-446-5500. distributor for information about DMM (digital multimeter). accessories. To order replacement parts or spares, see Or, visit Fluke 's website at Table 13 near the end of this Manual . To register your product, visit 1. 789. Users Manual To view, print, or download the latest Manual supplement, Inspect the test leads for damaged insulation or visit exposed metal. Check test lead continuity. Replace damaged test leads before using the Safety Information meter. A Warning identifies conditions and procedures that are Do not use the meter if it operates abnormally.
6 Dangerous to the user. A Caution identifies conditions and Protection may be impaired. When in doubt, procedures that can cause damage to the Product or the have the meter serviced. equipment under test. Do not operate the meter around explosive gas, vapor, or dust. International symbols used on the meter and in this Manual are explained in Table 1. Do not use in a damp or wet environment. Use only type AA batteries, properly installed in Warning the meter case, to power the meter. To prevent possible electrical shock, fire, or When servicing the meter, use only specified personal injury: replacement parts. Read Safety Information before using the Use caution when working above 30 V ac rms, meter. 42 V ac pk, or 60 V dc. Such voltages pose a Do not use the meter if it is damaged. Before shock hazard. using the meter, inspect the case. Look for When using the probes, keep fingers behind the cracks or missing plastic.
7 Pay particular finger guards on the probes. attention to the insulation surrounding the connectors. Connect the common test lead before connecting the live test lead. When Make sure the battery door is closed and disconnecting test leads, disconnect the live latched before operating the meter. test lead first. Remove test leads from the meter before opening the battery door. 2. ProcessMeter . Safety Information Do not use AutoHold to determine if dangerous Do not exceed the Measurement Category (CAT). voltage is present. AutoHold will not capture rating of the lowest rated individual component unstable or noisy readings. of a product, probe, or accessory. To avoid false readings, which could lead to possible electric shock or personal injury, Do not use the TL175 or TP175 test probes in replace the battery as soon as the battery CAT III or CAT IV environments without the indicator ( ) appears.
8 Probe tip fully extended and correct category rating visible in the window. Remove test leads from the meter before opening the battery door. When the TL175 is used with instruments or Close and latch the battery door before using other accessories, the lowest category rating of the meter. the combination applies. One exception is when the probe is used with the AC172 or AC175. To avoid personal injury or damage to the meter, use only the specified replacement fuse, 440 mA 1000 V fast-blow, Fluke PN 943121. 3. 789. Users Manual Table 1. International Symbols Symbol Meaning Symbol Meaning Risk of danger. Important information. See Manual . Hazardous voltage Conforms to relevant South Korean EMC. Conforms to European Union directives Standards Meets Underwriters' Laboratories safety Inspected and licensed by T V Product requirements Services Conforms to relevant North American Safety Standards Conforms to relevant Australian Standards Alternating current Earth ground Direct current Fuse Battery Double insulated Measurement Category II is applicable to test and measuring circuits connected directly to utilization points CAT II (socket outlets and similar points) of the low-voltage MAINS installation.
9 Measurement Category III is applicable to test and measuring circuits connected to the distribution part of CAT III the building's low-voltage MAINS installation. Measurement Category IV is applicable to test and measuring circuits connected at the source of the CAT IV building's low-voltage MAINS installation. This product complies with the WEEE Directive (2002/96/EC) 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. Go to Fluke 's website for recycling information. 4. ProcessMeter . How to Get Started How to Get Started Display If familiar with the Fluke 80 Series DMM, read Using the 789 PROCESSMETER.
10 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 Pushbuttons general, read Measuring Electrical Parameters in addition to the sections referenced in the previous 100% MIN MAX RANGE HOLD. paragraph. SpanCheck %STEP COARSE FINE. 0% REL Hz Rotary The sections following Using the Current Output Switch mV. Functions contain information about the power-up options, V. mA. A. and battery and fuse replacement instructions. V mA. Later, use the Quick Reference Guide to refresh your OFF mA. memory about the various functions and features that can 250. mA HART. be used. LOOP POWER. A mA COM V Input/Output Jacks CAT IV. 600 V. Figure 1. Fluke 789 ProcessMeter 5. 789. 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.