Fluke 789 Overview
The Fluke model 789 is a process meter that features:
24 V Loop power supply
HART mode setting with loop power (adds 250 ohm resistor)
100 % larger dual display
1,200 ohm drive capability on mA source
Enhanced backlight with two brightness settings
0-100 % mA Span Check buttons to toggle between 4 and 20 mA
Externally accessible fuses for easy replacement
DMM designed to meet 1000 volt IEC 1010
CAT III standards
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
Externally accessible battery for easy battery changes