Excessive or unstable dielectric loss: Possible poor contact of hooks or test clips, poor grounding, etc. The instrument grounding should be as close as possible to the test object. Additionally, determine whether it is affected by strong interference.
Low dielectric loss value: Usually, when measuring samples with very small capacitance, they are affected by the T-shaped network. Measures such as changing the angle of the test line and wiping the surface of the drying equipment can be taken to improve this. Additionally, it may also be affected by interference.
The instrument cannot be boosted: Check if the grounding knife switch of the equipment is open, pull out the test line and boost the voltage. If it still cannot be ruled out, it can be determined that there is an internal fault in the instrument.
CVT mode cannot be measured: Use a multimeter to measure the self-excited voltage output, check if the grounding at the lower end of C2 is open, and check if the tail end X of the intermediate transformer is grounded.
Light load or overload: Check whether the high-voltage test line is broken, whether the core wire is short circuited, and whether the core wire and shield are short circuited.
Excessive capacitance in reverse wiring: Adding capacitance to the ground during reverse wiring can cause measurement errors. A fully shielded test wire can be used to improve measurement accuracy.
