Fluke 789 Loop Calibration Process Meter

⚡ 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

⚡ Manual step (100%, 25%, coarse and fine) plus auto step and auto ramp

£995.00 exc VAT / £1,194.00 inc VAT

1 in stock

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A loop calibration multimeter, the Fluke 789 is an essential tool for any process technician.

An upgraded version of the Fluke 787, the 789 includes all of the functionality of the 787 and builds upon it with exclusive new features. With its built-in calibration tools and a full multimeter, this process tool ensures that all of your equipment can be extensively tested and calibrated without the need to use multiple tools.

Carrying out offline transmitter testing? The Fluke 789 includes a 24V loop supply to eliminate the need to use a separate power supply. It’s also got a built-in 250Ω Hart resistor, so there’s absolutely no need to take a separate resistor along to the measurement point.

Fluke 789/E ProcessMeter Key Features:

  • 24V loop power supply
  • Large dual display with adjustable backlight for use in different lighting conditions
  • 1200Ω drive capability on mA source
  • HART mode setting with loop power and built-in 250Ω resistor
  • 0 and 100% buttons to toggle between 4 and 20mA sourcing for a quick span check
  • External access to fuses for easy replacement
  • Infrared serial I/O port compatible with FlukeView Forms (V2.1) software
  • Full built-in digital multimeter compliant with EN61010-1 and CAT III standards
  • Measures voltage, current, resistance, frequency, diode and continuity
  • Precision 1000V, 440mA True RMS measurements
  • Frequency measurement to 20kHz
  • Simultaneous mA and % of scale readout
  • MIN/MAX/AVG/HOLD/Relative modes
  • Diode Test and continuity beeper
  • 20mA DC current source / loop calibrator / simulator
  • External access to the battery for easy changes
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
 to 19.999 kHz, 0.005% + 1 LSD
 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 shows diode voltage drop
Display current and % of span
Auto step, auto ramp


Environmental Specifications
Operating Temperature
 -20 ºC to 55 ºC
Storage Temperature
  -40 ºC to 60 ºC
Humidity (Without Condensation)
 95% up to 30 ºC
 75% up to 40 ºC
 45% up to 50 ºC
 35% up to 55 ºC
Temperature Coefficient
 0.05 x (specified accuracy) per ºC (for temperatures < 18 ºC or > 28 ºC)


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
Maximum voltage
 1000 V rms


Mechanical & General Specifications
 50 x 100 x 203 mm (1.25″ H x 3.41″W x 7.35″ L)
 610 g (1.6 lbs)
 4 AA Alkaline batteries
 3 years
Battery Life
 140 hours typical (measurement), 10 hours typical (sourcing 20 mA)
Shock & Vibration
 Random, 2 g, 5-500 Hz
 1 meter drop test
  • Fluke 789 ProcessMeter
  • TL71 Premium Test Lead Set
  • AC175 Alligator Clips
  • 4 x AA 9V Alkaline Batteries (Installed)
  • User Manual
  • Quick Reference Guide


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