SDT International SDT170, Руководство пользователя

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14. Technical considerations
MAN.170.EN--04--SDT170-user-manual-Eng.docx 68/141

Must be protected from any mechanical shock that can lead to a rupture of
the battery pack’s outer casing that can compromise the life of the batteries.

Must be recharged at least every 3 months when not used for long periods of
time.
14.3 T
HE BATTERY CHARGER
General
The mains supply voltage depends on the model used (110 or 220 VAC). The
output voltage of the battery charger can be either 7.2V or 9V depending on its
operating mode (charger connected directly to the battery pack, or charger
connected to the
SDT 170 , the unit being switched on or off). The maximum
output current is about 500 mA.
The charger must be unplugged from the mains before recharging a
new battery, in order to reset the internal timer.
While charging the battery pack the following charge criteria are permanently
monitored:
1. The battery cannot be overcharged because of the presence of battery
charging cycle detection by means of the

U method.
2. End of the battery charging cycle detection by means of excessive change in
the battery pack’s temperature.
3. Detection of temperature overload.
4. End of charging cycle by means of timeout timer.
View of the battery charger and its status indicator.
050
The status indicator light
When the battery charger is connected to the power supply, it informs the user of
its charging status by means of the status light. The definitions of the status light
are shown in the following table: