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.
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.
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 | 0-1 A AC or DC |
| Resolution | 1 mA | |
| Accuracy | 0.2% + 2 LSD (DC) | |
| Range | 0-30 mA | |
| Resolution | 0.001 mA | |
| Accuracy | 0.05% + 2 lSD | |
| Current sourcing | Range | 0-20 mA or 4-20 mA |
| Resolution | 0.05% of span | |
| Drive capability | 24 V Compliance or 1200 Ω @ 20 mA | |
| Frequency | to 19.999 kHz, 0.005% + 1 LSD | |
| Continuity | Beeps for resistance < 100 Ω | |
| Voltage measurement | Range | 0-1000 V AC (true-rms) or DC |
| Resolution | 0.1 mV to 1.0 V | |
| Accuracy | 0.1% Rdg + 1 LSD (VDC) | |
| 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 |
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| Temperature coefficient | 0.05 x (specified accuracy) per °C (for temperatures < 18°C or > 28°C) | |
| Safety Specifications | ||
| Electrical safety | Designed in accordance with IEC 1010-1, ANSI/ISA S82.01-1994 and CAN/CSA C22.2 No 1010.1-92 | |
| Overvoltage category | IEC 1010-1 CAT III 1000 V IEC 1010-1 CAT IV 600 V |
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| Maximum voltage | 1000 V RMS | |
| 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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