CEM DT-9812 is an Accurate AC digital clamp meter for leakage current measurement. It measures with a resolution of 100uA on 200mA range. One single instrument can measure test currents in the range of 200mA, 2A, 20A, 200A, 1000A AC. This Current range covers all possible applications. It has Shield transformer jaws to minimize the effect of external stray magnetic field. This product has the largest jaw with 68 mm diameter. A filter circuit is designed to eliminate the effect of high frequency noise and harmonics by setting the frequency selector switch at the 50/60 Hz position for AC current measurement. It has Large 3 1/2 digits LCD display with Fast bar-graph display (20 times/sec.) for transient observation. The model also has Continuity Test. Max/Min and Data Hold functions. Peak Value Measurement. It has 600V overload protection for DC/ACV, ohm range measurement. It has very easy to use, single rotary switch for any function selection. This clamp meter has very good frequency response due to the electric property of the transformer jaws used. Therefore, the measurement result contains not only the fundamental frequency of 50/60Hz but also the high frequencies and harmonics superimposed on the fundamental frequency. To eliminate the effect of high frequency noise, a low pass filter is designed to filter out high frequency signal. To enable the filter, just set the switch at the 50/60 position. The filter’s cut-off frequency is set at 100Hz with an attenuation characteristic of approx. 24dB/octave.
Wide Hz Selector.
If the circuit under test is originated from a high frequency generating device such as inverter, switching regulators, etc., then the switch should be set at wide position to measure the signal which contains the frequency from 40Hz-1kHz. To make sure the presence of high frequency signal, set the switch at 50/60 and wide position to see the difference. For more details please visit www.cem-instruments.in or write email to info@cem-instruments.in
