The Fluke 789 Process meter combines a loop calibrator with a digital multimeter to provide process technicians everything they need in one tool. It also features a 24-Volt loop supply reducing the need for taking a separate power supply when doing offline transmitter testing as well as a built-in, selectable 250-Ohm Hart resistor eliminating the need to carry a separate resistor.

• Precision 1000 V, 440 mA True-rms digital multimeter
• Frequency measurement to 20 kHz
• Min/Max/Average/Hold/Relative modes
• Diode Test and Continuity Beeper
• Simultaneous mA and % of scale readout
• 20 mA dc current source / loop calibrator / simulator
• Manual Step (100 %, 25 %, Coarse, Fine) plus Auto Step and Auto Ramp
• 24 V Loop power supply
• HART mode setting with loop power (adds 250 ohm resistor)
• 1200 ohm drive capability on mA source
• 0-100 % mA Span Check buttons to toggle between 4 and 20 mA
• DMM designed to meet 1000 volt IEC 1010 CAT III standards
• Enhanced backlight with two brightness settings