Fluke 789 ProcessMeter
The Fluke 789 ProcessMeter is a combined digital multimeter and mA loop calibrator in one device. This means it can be used for general electrical measurements as well as for working with current loops in process plants. For a service technician, it's practical because you can measure, source, and simulate mA with the same instrument when troubleshooting or calibrating a 4-20 mA circuit.
The instrument also has a built-in 24 V loop power supply, allowing you to power a loop directly during testing. Additionally, there is a selectable 250 Ω HART resistor, which is relevant when working with HART communication in the same loop. This makes the model particularly useful in instrumentation and process environments, where it is often necessary to check both signal and power supply on-site.
As a multimeter, it covers the typical measurements expected in field work, including voltage, current, resistance, continuity, and frequency. Therefore, it is not just a specialized instrument for one task, but a tool that combines several functions, so you don't have to switch between multiple separate instruments.
The safety level is also an important point. When working in electrical panels, facilities, and field installations, it is very important that the instrument is designed for tougher measurement tasks with the safety categories appropriate for industrial use.
Test leads, alligator clips, and batteries are included so it can be used immediately.
You can read more here:
See datasheet from the manufacturer
Specifications
- Combined digital multimeter and mA loop calibrator
- Can measure, source, and simulate mA
- Built-in 24 V loop power supply
- 250 Ω HART resistor
- Can measure up to 1000 V AC/DC
- Safety category: IEC 61010, CAT IV 600 V / CAT III 1000 V
- Comes with TL71 test leads, AC175 alligator clips, and 4 AA alkaline batteries
- Fluke part number: 3977194
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