Chapter XI Electrical System
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
467
Fig. 11-1-3 Checking storage battery with a pair of
discharge tongs
(2) Checking single cell voltage with a high rate
discharge gauge
High rate discharge gauge is also called
discharge tongs which consists of one 3 V DC
voltmeter and one loadresistor. Press the points
of two contact pins firmly on the positive and
negative poles of storage battery for 5 s to
observe the terminal voltage that storage battery
can maintain under high load discharging. By
doing this, the storage battery discharging rate
and starting ability can be judged.
For high rate discharge gauges produced by
different factories, read their electric current and
voltage readings according to corresponding
instructions. For storage battery of good
technical conditions, single cell voltage should be
higher than 1.5 V and stays constant in 5 s. If the
voltage drops quickly in 5 s or the voltage of one
single cell is lower than others by more than 0.1
V, there is something wrong with this battery and
measures shall be taken to repair it.
Resistor
Storage battery
Discharge tongs
contact pin
Voltmeter