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How to ensure the accuracy of the insulation resistance tester and what are the precautions for insulation resistance testing?

:2024-03-29 11:45:55:

The insulation resistance tester can ensure testing accuracy through the following methods:

Calibration and validation

The insulation resistance tester needs to be calibrated before production to ensure its measurement results are accurate. Calibration is usually carried out by professional laboratories or certification bodies, using standard reference devices to verify the output of the tester. In addition, the tester should be regularly validated to confirm that it remains within the predetermined accuracy range.

Precautions for operation

The voltage level of the insulation resistance tester should be suitable for the voltage level of the tested object to avoid breakdown of the insulation of the tested equipment; It is strictly prohibited to shake the insulation resistance on lines with people working, and shaking measurement work is strictly prohibited during lightning strikes; When measuring near live equipment, personnel and instruments should maintain a safe distance from the live equipment to prevent the measurement leads from touching the live parts.

In addition, methods such as comparative measurement can be used to ensure testing accuracy. For more information, it is recommended to consult the user manual of the insulation resistance tester or consult relevant technical personnel.

Precautions for insulation resistance testing include:

Preparation before testing: Ensure that the electrical equipment to be tested has been disconnected from power and confirm that the equipment is completely voltage free. Check if the switch of the electrical equipment has been turned off and unplug all plugs.

Instrument calibration: Use professional insulation resistance testing instruments, such as multimeters and insulation resistance testers, and perform accurate calibration to ensure the accuracy of test results.

Test environment: Avoid testing in environments with high humidity or low temperature to avoid interference with test results.

Test operation: Select the appropriate test voltage and time. Excessive voltage or time may cause damage to the insulation material of the equipment. Pay attention to the changes in insulation resistance and record the test results in a timely manner.

Safety precautions: During the testing process, the testing personnel should wear long sleeved cotton work clothes and insulated shoes, wear a safety helmet, and the operator should stand on the insulated mat. It is prohibited to use insulation resistance meters during lightning or near high-voltage equipment to avoid danger.


ZC-430C Digital insulation resistance meter also known as megohmmeter, high voltage insulation resistance tester, etc., for the insulation resistance test. The instrument has a large LCD screen gray backlit display, data storage, data access, alarm, automatic shutdown and other

functions. At the same time, it also has the function of measuring DC voltage, AC voltage, absorption ratio and polarization index of DC 

voltage. It is suitable for measuring the resistance value of various insulating materials and the insulation resistance of transformers, motors, cables and electrical equipment.At the same time, it can output a variety of different voltage levels with the step-adjusting voltage function.

Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website:

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