10
indicator, please use the company’s charging instrument to charge.
It’s the smart charger for the battery charger. When the battery is
full, that is, the charger indicator light to turn off automatically stop
charging the battery, effectively preventing battery overcharge.
Note
: if the instrument will not be used in long-term, you also
should be carried out regularly charge the battery (such as two
months) ,in order to avoid battery over-discharge damage. Do not
charge the battery when use ordinary batteries.
VI. Measurement principle and application
(1) Two- clamp method
1
、
The measuring principle
The method has many advantages. First, easy to operate. The
test can be executed when the device is working. No measuring
probes are needed and it is not necessary to separate the
electrodes. The grounding resistance can be obtained by clamping
the grounding conductor. Second, the method has high accuracy
to 0.01Ω. Third, the method has high anti-interference ability and
the line frequency harmonics can be filtered. Fourth, it can be a
way to piling method. In many conditions (such as housing or
regions covered with cement-intensive), it is difficult to adopt the
way of piling to measure the grounding resistance. But it is not
necessary for double clamp method. However there is shortage of
this method too. And it can not measure the grounding resistance
for a single point grounding system.
The measurement principle be summarized as follows: The
