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1030 Technical Manual
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6.
B attery R eplacement & R echarging
The battery capacity for rechargeable types is approx. 110mAH, whereas non-
rechargeable types are approx. 70mAH. The 1030 circuitry takes 2mA, and will
operate over a battery voltage range of 7-12 volts. The battery life is primarily
dependent on the output current used. With low output currents, battery life can
exceed 60 hours, but when driving a 100mA output current, battery life is reduced to
about 50 minutes.
The battery should be replaced or recharged when the font panel battery level
indicator fails to register in the green section of the scale. The life of Ni-Cad batteries
is considerably reduced if they are subject to excessive discharging caused by
operating the instrument with an insufficient reading on the battery level indicator.
To replace the battery, unscrew the four screws in the rear cover of the instrument.
The battery is visible above the main P.C.B., (See Fig.1). Carefully remove the old
battery, and insert the new one. Screw the rear cover back on, and test the battery
condition.
To recharge a Ni-Cad battery, it is recommended that the instrument is turned off, in
order to reduce charging time to the 15hrs minimum. The charger is then plugged into
the recharge socket on the back. Note that it is NOT necessary to remove the battery
to recharge it. The battery will not be overcharged if the recharger is connected
continuously.
The charger is of the constant current type and should only be used when recharging
the internal Ni-Cad battery. The Ni-Cad battery can also be recharged from a 12V D.C.
supply by connecting the 1030 recharge socket to the 12V D.C. supply via a 300 Ohm,
1/4 watt resistor.
If it is required to power the 1030 from an external source, remove the internal battery,
and connect a 9 volt DC constant Voltage Power Unit into the recharge connector.
Note that the output is not isolated from the charger socket.
By powering the 1030 from an external source, it is possible to increase the voltage
limit on the current ranges to 12 volts.
BATTERY
PP3 9V
Fig. 1
