The digital megohmmeter has the functions of large-screen LCD gray-white backlight display, data storage, data access, alarm, automatic discharge, charging, and automatic shutdown. During the test, it is allowed to boost the voltage first and then connect the test product to test, and continuous measurement can be performed without turning off the power supply.

At the same time, the digital megohmmeter also has the functions of measuring DC voltage and AC voltage absorption ratio and polarization index. Digital megohmmeter, insulation resistance tester, the whole machine is beautiful and high-grade, wide range, high resolution, convenient operation, convenient to carry, accurate, reliable, stable performance, high output power, strong anti-interference ability.

The meaning of the terminal symbols of the digital megohmmeter

When measuring the insulation resistance, the line "L" is connected to the conductive part of the measured object and the ground is insulated, the grounding "E" is connected to the shell or the grounded part of the measured object, and the shielding "G" is connected to the protective shielding part of the measured object. Or other parts that are not involved in the measurement are connected to eliminate errors caused by meter leakage. When measuring the insulation resistance between the components of electrical products, the "L" and "E" terminals can be connected to any set of wire ends. For example, when measuring the insulation between generator phases, the three groups can be exchanged in turn, and the vacant one is connected to a corresponding safety ground.

Digital megohmmeter measurement steps

Turn on the power switch "ON/OFF", select the desired voltage level, the default is 500V when the power is turned on, select the desired voltage level, the corresponding indicator light is on, lightly press the high voltage "start and stop" button, the high voltage indicator light is on, and the LCD display is stable The value multiplied by 10 is the measured insulation resistance value. When the insulation resistance value of the test product exceeds the upper limit of the digital megohmmeter range, the shou digit of the display screen will display "1", and the last three digits will go out. When turning off the high voltage, you only need to press the high voltage "start and stop" button again, and when turning off the power of the whole machine, press the power "ON/OFF".

Note: During the measurement, due to the absorption and polarization process of the test sample, the insulation value reading gradually drifts to a large value or there are some up and down jumps, which is a normal phenomenon.