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Features of the Fluke 789:
 
24 V Loop power supply 
Very large dual display 
Enhanced backlight with 2 brightness settings 
1200 Ohm drive capability on mA source 
HART mode setting with loop power and a built-in 250 ohm resistor 
0% and 100 % buttons to toggle between 4 and 20 mA sourcing for a quick span check 
Externally accessible fuses for easy replacement 
Infrared-port to process data in FlukeView Forms (V2.1) software 
Precision 1000 V, 440 mA True-RMS digital Multimeter 
0.1% dc voltage accuracy 
0.05% dc current accuracy 
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