-14-
Ⅷ．
Other Descriptions and Notes
1
．
The special utility of current clamp
The two current clamps of each meter could only be used on this
instrument.
The current clamp should be prevented from any impact, the clamp
surface must be kept clean and could fully close for a reliable test.
2.
The maintenance of current clamp
The dust on the surface of the current clamp should be removed
promptly after use; don’t use rough material or corrosive to clean the
clamp, which is best to be gently wiped clean with soft cloth and
lubricants (for example: WD-40 lubricants).
3.
Preheat 3 to 5 minutes before the measurement to ensure the
measurement accuracy
4
．
The instrument should be used for secondary and low-voltage circuit
detection, and cannot be used to measure the current of high-voltage
lines to prevent electric shock.
5
．
T
hree-phase four-wire system (Phase of a balanced threephase load)