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Common faults of ground resistance tester

time:2020/10/7   source:华天电力  reading:227 time

Common faults of ground resistance tester


1. The meter should be in a relaxed and natural state during power-on self-checking. When holding the meter with one hand, your fingers should not touch the clamp handle. This is very important to ensure the accuracy of the measurement.


2. When the measured resistance is large (for example, greater than 100 ohms), in order to ensure the measurement accuracy, before pressing the POWER button (that is, before the meter is powered on). Press the clamp handle to open and close the jaws 2-3 times, and then start the meter. This is very important to ensure the measurement accuracy of resistance greater than 100 ohms.


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3. Keep the jaw contact surface clean at all times. The anti-pollution ability of this instrument is already very strong. However, excessive pollution will still reduce the measurement accuracy of the meter, especially the measurement accuracy of resistance above 100 ohms.


4. The anti-interference ability of this instrument is already very strong. It has sufficient anti-interference ability for the current on the ground line of the tower, but the low-voltage transformer connected to the zero system has too much unbalanced current, so it still needs to be powered off for testing.


5. There will be a slight hum when the instrument is working, which is normal.


6. The jaw part of the meter is floating. It is normal for the user to feel a slight shaking when using it.


7. Please take out the battery from the battery compartment when not using the meter for a long time.


8. In any case, users must pay attention to safety when using this instrument.


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