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Jeremy SilvaAug 25, 2025
What to do if the live circuit indicator blinks red and the buzzer sounds during insulation resistance measurement with Hioki IR4055?
- LLaura PooleAug 25, 2025
If, during insulation resistance, low resistance, or PV? measurement, the voltage applied between the measurement terminals exceeds approximately 20 V for insulation resistance and PV?, or approximately 5 V for low resistance, make sure that the measurement target is disconnected from a live circuit. If voltage exists in the measurement target, the live circuit indicator will blink.
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