Charging Batteries; Operation With The Mains Unit - TESTO 340 Instruction Manual

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E.1.2 Charging batteries
The rechargeable battery can only be charged at an ambient temperature of ±0...+35°C.
If the rechargeable battery has discharged completely, the charging time at room tem-
perature is approx. 5-6 hrs.
Charging in the measuring instrument
The measuring instrument must be switched off.
1 Connect the plug of the mains unit to the mains unit socket on the measuring instru-
ment.
2 Connect the mains plug of the mains unit to a mains socket.
- The charging process will start. The charge status will be shown on the display.
The charging process will stop automatically when the rechargeable battery is fully
charged.
Charging in the charger (0554 1103)
Refer to the documentation that comes with the charger.
Battery care
If possible, always discharge the rechargeable battery and recharge it fully.
Do not store the battery for long periods when discharged. (The best storage condi-
tions are at 50-80 % charge level and 10-20 °C ambient temperature; charge fully
before further use).
E.1.3 Operation with the mains unit
1 Connect the plug of the mains unit to the mains unit socket on the measuring instru-
ment.
2 Connect the mains plug of the mains unit to a mains socket.
- The measuring instrument is powered via the mains unit.
- If the measuring instrument is switched off and a rechargeable battery is inserted, the
charging process will start automatically. Switching the measuring instrument on has
the effect of stopping rechargeable battery charging and the measuring instrument is
then power ed via the mains unit.
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