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How to use insulation resistance meter

time:2021/4/11   source:华天电力  reading:483 time

Insulation resistance meter, also known as shaking meter, megohm meter, is mainly used for measuring the insulation resistance of high-voltage or low-voltage electrical circuits and electrical equipment. It is easy to carry, does not need other auxiliary equipment when measuring, and can directly read the readings from the dial.


Check before use. Before using the insulation resistance meter, put it in a horizontal position, open the end buttons "E" and "L", and shake the hand crank at the rated speed of 120r/min or 150r/min to generate electricity. Check whether the pointer is at the infinity (∝) position, then short-circuit "E" and "L" and crank the generator at the rated speed to see if the pointer points to zero. At the same time, check whether the generator rotates flexibly and whether there is jitter. Whether the pointer of the insulation resistance meter is stuck.


Insulation Resistance Tester (3).png


Choose an appropriate insulation resistance meter before use. First, select an appropriate insulation resistance meter based on the object to be measured and its rated voltage. That is, the selected insulation resistance meter must have its rated voltage compatible with the working voltage of the electrical equipment or electrical circuit under test. Example: To measure the insulation resistance of high-voltage equipment, an insulation resistance meter with a rated voltage lower than 500V cannot be used. The measurement result at this time cannot reflect the insulation resistance under the working voltage. Therefore, it is necessary to be careful not to use an insulation resistance meter with too high voltage to measure the insulation resistance of low-voltage electrical equipment to prevent damage to its insulation. At the same time, the measuring range of the insulation resistance meter should not exceed the range of the measured insulation resistance too much.


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