Safe Operation and Maintenance of High-Speed Insulation Resistance Tester
The high-speed insulation resistance tester is a precision instrument for rapidly measuring the insulation performance of electrical equipment, insulating materials and electronic components. It rapidly applies test voltage via its built-in high-voltage source and adopts high-speed signal acquisition and processing technology to complete insulation resistance measurement within milliseconds. Widely used in power systems, electronics manufacturing, automobile industry, aerospace and quality inspection sectors, it efficiently detects hidden dangers such as insulation aging, damage and moisture to ensure the safe operation of electrical equipment.1.
1. Safety Operation Precautions
No live testing: Confirm that the tested equipment is completely powered off before measurement, and verify zero residual voltage with a multimeter. Hang a “No Switching On” warning sign to prevent electric shock accidents.
High-voltage protection: DC high voltage (typically 500V–10kV) will be output between the L and E terminals after the high voltage is activated. Do not touch the test leads, terminals or tested equipment with any part of the human body during measurement. Operators are recommended to wear insulating gloves and insulating shoes and stand on an insulating mat.
Full discharge: Discharge the tested equipment (especially large-capacitance devices) after testing for at least 1 minute with a dedicated discharge rod to avoid personal injury or instrument damage caused by residual charges.
Explosion-proof environment: When conducting tests in flammable and explosive locations (e.g., gas stations, chemical workshops), explosion-proof models must be used. Any spark generation is prohibited to prevent explosions.
2. Instrument Maintenance
Pre-test self-inspection
Perform open-circuit and short-circuit tests after power-on to confirm normal instrument performance. The pointer shall indicate “∞” in open-circuit test and “0” in short-circuit test.
Regular calibration
Submit the instrument to a metrology institution for annual calibration and obtain a calibration certificate to guarantee measurement error ≤ ±3%. Conduct single-point verification with standard resistors after calibration to ensure reliable accuracy.
Power management
Battery power supply: Check battery level before measurement. Charge or replace the battery promptly when power is below 20%.
Remove the battery for storage if the instrument will not be used for a long time to prevent circuit corrosion caused by electrolyte leakage.
AC power supply: Use a voltage stabilizer to avoid interference with the high-speed acquisition system from voltage fluctuations.
Probe and test lead maintenance
Inspect the insulation layer of test leads for cracks or aging; replace with matching test leads immediately if damaged.
Clean test terminals regularly to avoid poor contact resulting from oxidation.
Avoid excessive bending of test leads to prevent breakage of internal conductors.