The insulation resistance tester is used to measure the insulation resistance of insulating structural materials, electrical technical products, and various electronic components. After being matched with a constant temperature water bath, it can also measure the plastic wire and cable (without shielding layer) under different working temperatures. Insulation resistance. The development of this instrument has important advantages such as high measurement accuracy, relatively stable performance, simple operation, and high voltage short circuit at the input.

Before measuring the insulation resistance tester, you need to make the following preparations:

(1) Before measurement, the working power supply of the equipment under test must be cut off and short-circuited to ground. Never allow analysis and measurement of the live condition of enterprise equipment to ensure the safety of students and equipment.

(2) This possibility must be eliminated before measuring equipment that may sense high voltage.

(3) The surface of the test object should be clean. Reduce the contact resistance to ensure the accuracy of the engineering measurement research results.

(4) Check the measurement, check whether the megohmmeter is in normal working condition, mainly check its "0" and "∞" two points, that is, shake the handle. To enable the motor to reach a rated operating speed, the megohmmeter should point to the "0" position when it is short-circuited, and it should point to the "∞" position when it is open.

(5) The megohmmeter should be placed in a stable and firm place when using it. And far away from the large external current through the conductor and the external magnetic field.

After completing the above data preparation and related work, you can pass the measurement. When measuring, you must also pay attention to the correct wiring of the megohmmeter, otherwise it will cause unnecessary errors or even errors in the enterprise.