1. During the power-on self-check, the instrument should be in a relaxed and natural state. When holding the instrument with one hand, the fingers should not touch the handle. This is very important for ensuring measurement accuracy.
2. When the measured resistance is large (for example, greater than 100 ohms), to ensure measurement accuracy, it is better to press the handle of the clamp 2-3 times before pressing the POWER button (that is, before the instrument is powered on), and then start the instrument. This is very important for ensuring the measurement accuracy of resistances greater than 100 ohms.
3. At all times, keep the contact surface of the clamp open/close mechanism clean. Although this instrument has a strong anti-pollution ability, excessive pollution will still reduce the measurement accuracy of the instrument. Especially for resistances greater than 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 tower grounding wire. However, for the low-voltage transformer of the zero-grounding system, since the unbalanced current is too large, it is still necessary to power off for testing.
5. This instrument will have a slight humming sound during operation, which is normal.
6. The clamp part of the instrument is floating. Users will have a slight shaking sensation when using it, which is also normal.
7. When not using this instrument for a long time, please remove the batteries from the battery compartment.
8. In any case, when using this instrument, users must pay attention to safety.
Post time: Aug-26-2026