Dual Display Digital Multimeter, 5 Digits, RS-232 interface standard. Option: 05 = IEEE-488.2 interface. Multifunction vacuum fluorescent dual display allowing the user to measure two different parameters of the same signal from one test connection, and view both measurements at the same time. True rms voltage and current measurements, incl. ac and dc 0.05 % dc current accuracy for 4 - 20 mA current loop serivce Frequency measurements from 5 Hz to 1 MHz 16 different measurement capabilities dB measurements: 21 selectable reference impedance for 2 to 8000 ohms, and audio from 2 to 16 ohms RS-232 interface standard, IEEE-488.2 option MIN/MAX mode RELATIVE mode Compare (Hi/Lo/Pass) function for quick in-tolerance tests Closed-Case Calibration: Calibration can be performed via the RS-232 (or optional IEE-488.2) interface or manually from the front panel. No internal adjustments are required Optional FlukeView Forms, accessory software package; allows quick set-up and effortless communication between the Fluke 45 and an IBM PC or compatible. Custom forms are easily created, saved, and recalled Vdc range: 0 - 1000 V Resolution: 1 uV - 0.01 V Vac range /True rms ac coupled, 20 Hz - 100 kHz: 0 - 750 V Resolution: 1 uV - 0.01 V Adc range: 0 mA - 10 A Resolution: 0.1 uA - 10 mA Aac range (true rms, ac coupled, 20 Hz - 20 kHz: 15 uA - 10 A Resolution: 0.1 uA - 10 mA Resistance: 0 - 100 Mohms Resolution: 0.001 ohms - 1 mohms Frequency range: 5 Hz - 1 MHz Resolution: .01 Hz - 1 kHz dB read out (600 ohms ref. (ref. Z 2 - 8000 ohms): -34 +/- 60 dB Resolution: 0.01 -0.1 dB Dimensions (WxHxD): 8.5 x 3.67 x 11.27 in. Weight: NET 5.2 lb, with battery 7 lb