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Key new features of the Fluke 789

• 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
• Infrared I/O serial port compatible with FlukeView® Forms Software Version 2.1 (available Feb. 2003)
• 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