Unraveling Fluke Processmeter 789: From Full Specifications To Potential Issues
Fluke ProcessMeter 789 Information
The Fluke 789 ProcessMeter is a digital multimeter and loop calibrator in one. It is a powerful tool for electricians and instrumentation professionals who need to troubleshoot and calibrate process control instruments.
Intro
The Fluke 789 has a large, dual display with two levels of backlighting and externally accessible fuse and batteries for easy replacement. It also has a built-in, selectable 250-ohm HART® resistor that eliminates the need to carry a separate resistor. The 789 also has a built-in 24-Volt loop supply, which reduces the need to carry a separate power supply when doing offline transmitter testing.
Specifications
The Fluke 789 has the following specifications:
- CAT III 1000 V, CAT IV 600 V safety rating
- True-RMS measurement
- 1000 V DC voltage range
- 440 mA DC current range
- 20 kHz frequency range
- 0.1% DC voltage accuracy
- 0.05% DC current accuracy
- Built-in HART® communications
- Built-in 24-Volt loop supply
- Wireless data logging with Fluke Connect™
Features
The Fluke 789 has the following features:
- Multimeter functionality: The 789 can be used to measure voltage, current, resistance, frequency, and continuity. It also has a diode test function and a peak hold function.
- Loop calibrator functionality: The 789 can be used to calibrate loop transmitters. It has a variety of output waveforms, including DC, AC, and pulse. It also has a variety of step sizes, up to 1%.
- HART® communications: The 789 can communicate with HART®-enabled instruments. This allows you to read and write HART® parameters, troubleshoot HART® communications, and perform diagnostics.
- Wireless data logging: The 789 can wirelessly log data to your smartphone or tablet. This allows you to view and analyze data remotely.
What's in the box
The Fluke 789 comes with the following items:
- Fluke 789 ProcessMeter
- Carrying case
- Instruction manual
- 9V battery
- Fuse
- HART® adapter
Conclusion
The Fluke 789 is a powerful tool for electricians and instrumentation professionals who need to troubleshoot and calibrate process control instruments. It is a versatile instrument that combines the functionality of a digital multimeter and a loop calibrator. The 789 also has wireless data logging capabilities, which makes it a valuable tool for remote troubleshooting.
Fluke ProcessMeter 789 Compare with Similar Item
a table comparing the Fluke ProcessMeter 789 with similar items:
| Feature | Fluke ProcessMeter 789 | Fluke 787B | Fluke 87V |
|---|---|---|---|
| Measurement ranges | AC/DC volts, AC/DC current, resistance, continuity, frequency, temperature | AC/DC volts, AC/DC current, resistance, continuity, frequency | AC/DC volts, AC/DC current, resistance, continuity, frequency |
| Accuracy | +/-0.01% + 1 count | +/-0.05% + 2 digits | +/-0.02% + 2 digits |
| Display | Multiline LCD | Multiline LCD | Multiline LCD |
| Power source | 4 AA batteries | 4 AA batteries | 9V battery |
| Safety rating | CAT III 1000V, CAT IV 600V | CAT III 1000V, CAT IV 600V | CAT III 1000V, CAT IV 600V |
| Current source/simulate | 0 to 20mA DC | 0 to 20mA DC | N/A |
| Loop power supply | 24V DC | N/A | N/A |
| Simultaneous mA and % scale readout | Yes | No | No |
| Weight | 0.61 kg | 0.54 kg | 0.52 kg |
| Price | $1,322.99 | $1,119.99 | $999.99 |
As you can see, the Fluke ProcessMeter 789 is a more advanced tool than the Fluke 787B and the Fluke 87V. It offers a wider range of measurement capabilities, including temperature measurement, and it has a higher accuracy. It also has a built-in 24V loop power supply and the ability to simultaneously display mA and % scale readout. However, it is also more expensive than the other two tools.
Ultimately, the best tool for you will depend on your specific needs. If you need a versatile tool with a wide range of measurement capabilities, then the Fluke ProcessMeter 789 is a good option. However, if you are on a budget or you only need basic measurement capabilities, then the Fluke 787B or the Fluke 87V may be a better choice.
Fluke ProcessMeter 789 Pros/Cons and My Thought
The Fluke ProcessMeter 789 is a versatile tool that combines the functionality of a calibrator of loop current and the power of a digital multimeter. It is a popular choice for electricians and process technicians who need to troubleshoot and calibrate industrial control systems.
Pros:
- The Fluke 789 is a powerful tool that can measure a wide range of parameters, including voltage, current, resistance, frequency, and temperature.
- It also has a number of features that make it well-suited for troubleshooting, such as the ability to generate and simulate 4-20 mA signals, measure loop resistance, and provide 24 VDC loop power.
- The Fluke 789 is a rugged and reliable tool that is built to withstand the harsh environments found in industrial settings.
- It is also easy to use and has a clear and intuitive display.
Cons:
- The Fluke 789 is a relatively expensive tool.
- It can be bulky and heavy, which can make it difficult to carry around.
- The software that comes with the Fluke 789 can be a bit clunky.
User Reviews:
Here are some positive and negative user reviews of the Fluke 789:
- Positive: "This is a great tool for troubleshooting industrial control systems. It is easy to use and has a lot of features. I would definitely recommend it to anyone who needs to work on these types of systems."
- Negative: "This tool is very expensive. I also found the software to be a bit clunky. Overall, it is a good tool, but I think it is overpriced."
My Thoughts:
Overall, I think the Fluke 789 is a great tool for electricians and process technicians who need to troubleshoot and calibrate industrial control systems. It is powerful, reliable, and easy to use. However, it is also a relatively expensive tool, so it may not be the best choice for everyone.
If you are looking for a versatile and powerful tool for troubleshooting industrial control systems, I would recommend the Fluke 789. However, if you are on a budget, you may want to consider a less expensive option.
Fluke ProcessMeter 789 Where To Buy
some places where you can buy the Fluke ProcessMeter 789 and spare parts:
- FlukeDirect: This is the official website of Fluke, so you can be sure that you are buying genuine products. They also offer a variety of spare parts for the ProcessMeter 789.

- Walmart: Walmart is a great place to find electronics at a good price. They often have sales on Fluke products, so you can save some money.

- Amazon: Amazon is another great option for finding electronics. They have a wide selection of Fluke products, including the ProcessMeter 789 and spare parts.

- Best Buy: Best Buy is a popular electronics retailer that also carries Fluke products. They often have in-store demonstrations of Fluke products, so you can see them in action before you buy.

- Lowes: Lowes is a home improvement store that also carries a selection of Fluke products. They often have coupons and discounts available, so you can save some money.
- eBay: eBay is a great place to find used and refurbished Fluke products. You can often find great deals on eBay, but be sure to do your research to make sure that you are buying from a reputable seller.

I hope this helps!
Fluke ProcessMeter 789 Problems and Solutions
some common issues and solutions for the Fluke ProcessMeter 789, as reported by experts:
Issue: The meter won't power on. Solution:
- Check the power cord to make sure it is plugged in and properly connected to the meter.
- Check the batteries to make sure they are installed correctly and have a good charge.
- If the meter still won't power on, try resetting it by pressing and holding the power button for 10 seconds.
Issue: The LCD display is faded or has missing segments. Solution:
- Check the contrast setting on the meter.
- If the contrast setting is not the problem, the LCD display may need to be replaced.
Issue: The meter is not measuring or reading volts, amps, or ohms accurately. Solution:
- Check the leads to make sure they are properly connected to the meter and the test points.
- Check the settings on the meter to make sure they are correct for the measurement you are trying to make.
- If the meter is still not measuring or reading accurately, it may need to be calibrated.
Issue: The keypad buttons don't work. Solution:
- Check the keypad to make sure it is not dirty or damaged.
- If the keypad is not dirty or damaged, the buttons may need to be replaced.
Issue: The meter won't source or output mA loop current. Solution:
- Check the settings on the meter to make sure they are correct for sourcing or outputting mA loop current.
- If the settings are correct, the meter may need to be repaired.
Issue: The LCD display or case is cracked or broken. Solution:
- If the LCD display is cracked or broken, it will need to be replaced.
- If the case is cracked or broken, it can be repaired or replaced.
Typical Repair Cost Range: $250 - $375
If you are unable to resolve the issue with your Fluke ProcessMeter 789, you may need to contact Fluke or a qualified repair technician for further assistance.
I hope this helps!
Fluke ProcessMeter 789 Manual
Safety Information
- Read and understand all safety warnings and instructions before using the Fluke 789 ProcessMeter.
- Do not use the meter in an explosive atmosphere.
- Do not use the meter in a damp or wet environment.
- Do not expose the meter to temperatures above 122°F (50°C).
- Do not drop the meter.
- Do not use the meter if it is damaged.
- Keep the meter out of the reach of children.
Before Use
- Before using the meter, inspect it for damage. If you find any damage, do not use the meter.
- Install the batteries (see "Battery Replacement" section).
- Set the meter to the correct range for the measurement you are making.
- Connect the meter to the circuit you are testing.
Troubleshooting
If you are having problems with the meter, try the following troubleshooting steps:
- Check the batteries to make sure they are installed correctly and are not dead.
- Make sure the meter is set to the correct range.
- Check the connections to make sure they are secure.
- If you are still having problems, contact Fluke Technical Support.
Maintenance
- Keep the meter clean by wiping it with a damp cloth.
- Do not use harsh chemicals or solvents to clean the meter.
- Do not expose the meter to extreme temperatures or humidity.
- Replace the batteries when the low battery indicator appears.
Warranty
The Fluke 789 ProcessMeter is warranted to be free from defects in materials and workmanship for a period of two years from the date of purchase. If the meter fails during the warranty period, it will be repaired or replaced free of charge.
Contact Information
Fluke Corporation
1001 Innovation Way
Everett, WA 98203
USA
Phone: 1-800-44-FLUKE (1-800-443-5853)
Email: [email protected]
Website: https://www.fluke.com
Additional Information
- The Fluke 789 ProcessMeter can be used to measure a variety of electrical parameters, including voltage, current, resistance, frequency, and duty cycle.
- The meter can also be used to source and simulate 4-20 mA signals.
- The meter has a built-in 24-Volt loop supply.
- The meter can be connected to a PC using the Fluke Connect™ software.
- The Fluke 789 ProcessMeter is a powerful tool for troubleshooting and calibrating process instruments.
I hope this manual has been helpful. Please contact Fluke Technical Support if you have any further questions.

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