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Key features
Compact digital multimeter and mA loop calibrator solution Full-featured mA loop calibrator with built-in 24v Loop Power Quickly and easily troubleshoot every part of a control loop Large, bright dual-measurement display
Product overview: Fluke 789 ProcessMeter™
Fluke 789 ProcessMeter™ doubles your troubleshooting power
The Fluke 789 ProcessMeter is the ultimate troubleshooting tool for electricians and instrumentation professionals. It combines the functionality of a full-featured loop calibrator with the power of a CAT III 1000 V, CAT IV 600 V safety rated digital multimeter, and the wireless capabilities of Fluke Connect connectivity with optional IR3000FC module. The 789 has a large, dual display with two levels of backlighting and externally accessible fuse and batteries for easy replacement. And its built-in, selectable 250-ohm HART® resistor 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. You can also add the wireless data logging capabilities of the Fluke Connect™ mobile app to log data wirelessly to your smart phone and review it from a remote location.
*Requires Fluke IR3000FC module (not included). Not all models are available in all countries. Check with your local Fluke representative.
Do a lot more while carrying a lot less
The 789 provides all standard DMM capabilities including frequency measurement to 20 kHz, Min/Max/Average/Hold/Relative modes, and diode test and continuity beeper. Combine that with the ability to troubleshoot every part of the loop.
Measure, source, simulate 4-20 mA signals, measure resistance, measure power, provide power to the loop and provide 250-ohm resistance to the loop. The 789 includes SpanCheck; 0% and 100% buttons to toggle between 4 and 20 mA sourcing, while the display can simultaneously show mA and % of scale readings for faster troubleshooting. It also delivers 1200-ohm drive capability on mA source.
Accuracy
This ProcessMeter offers manual step, 100%, 25%, Coarse, Fine, plus auto step and auto ramp. It also delivers 0.1% DC voltage accuracy and 0.05% DC current accuracy.
Specifications
| Current measurement | Range |
| Resolution | |
| Accuracy | |
| Range | |
| Resolution | |
| Accuracy | |
| Current sourcing | Range |
| Resolution | |
| Drive capability | |
| Frequency | to 19.999 kHz, 0.005% + 1 LSD |
| Continuity | Beeps for resistance < 100 Ω |
| Voltage measurement | Range |
| Resolution | |
| Accuracy | |
| Resistance measurement | to 40 MΩ, 0.2% + 1 LSD |
| Diode test | 2.0 V shoes diode voltage drop |
| Display current and % of span | Yes |
| Auto Step, Auto Ramp | Yes |
Environmental Specifications
| Operating temperature | -20°C to 55°C |
| Storage temperature | -40°C to 60°C |
| Humidity (without condensation) | 95% up to 30°C |
| 75% up to 40°C | |
| 45% up to 50°C | |
| 35% up to 55°C | |
| Temperature coefficient | 0.05 x (specified accuracy) per °C (for temperatures < 18°C or > 28°C) |
Mechanical and General Specifications
| Size (H x W x L) | 50 x 100 x 203 mm (1.25 x 3.41 x 7.35 in) |
| Weight | 610 g (1.6 lbs) |
| Batteries | 4 AA alkaline batteries |
| Warranty | 3 years |
| Battery life | 140 hours typical (measurement), 10 hours typical (sourcing 20 mA) |
| Shock and vibration | Random, 2 g, 5-500 Hz
1 meter drop test |
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