Fluke CNX v3000 Manual - Page 21
AC Zero Input Behavior of True-rms Meters, Basic Measurements, AC and DC Voltage Measurements
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AC Zero Input Behavior of True-rms Meters Average responding meters can accurately measure only pure sinewaves. A True-rms meter can accurately measure distorted waveform signals. A minimum input voltage is necessary for Calculating True-rms converters to make a measurement. Because of this minimum input, true-rms meter specifications are only good for 1 % to 100 % of range. Non-zero digits that are shown on a true-rms meter when the test leads are open or are shorted are possible. This has no effect on the ac measurement accuracy of signals that are more than 1 % of range. Unspecified input levels on the lowest ranges are: AC voltage less than 1 % of 600 mV ac or 6 mV ac. AC current less than 5 % of 60 mA ac or 3 mA ac. Wireless Multimeter AC Zero Input Behavior of True-rms Meters Basic Measurements Warning To prevent possible electrical shock, fire, or personal injury, disconnect power and discharge all high-voltage capacitors before you measure resistance, continuity, capacitance, or a diode junction. The figures that follow show how to make basic measurements with the Product. When you connect the test leads to the circuit or device, connect the common (COM) test lead before the live lead. When you remove the test leads, remove the live lead before the common test lead. AC and DC Voltage Measurements The voltage ranges are 600.0 mV, 6.000 V, 60.00 V, 600.0 V, and 1000 V. To set the 600.0 mV dc or ac range, turn the function switch to . Push to toggle the Product between millivolts dc and millivolts ac. Refer to Figure 1 to measure ac or dc voltage. 13 MyFlukeStore Shop for Fluke products online at: www. .com 1.877.766.5412