First Steps; Charging The Battery; Connecting The Mains Unit - TESTO 338 Instruction Manual

5 First steps

5 First steps
5.1.

Charging the battery

Fully charge the rechargeable battery before using the instrument.
The rechargeable battery can only be charged at an ambient
temperature of 0 to 35°C / 32 to 95°F. If the rechargeable battery
pack has discharged completely, the charging time at room
temperature is approx. 8-9 hrs.
> Switch the instrument off before charging the battery.
1. Insert the instrument plug of the mains unit into the mains
socket on the instrument.
2. Insert the mains plug of the mains unit into a mains socket.
- The charging process will start. The battery symbol illuminates
with a variable number of segments. The charging process
stops automatically and
charged.
5.2.

Connecting the mains unit

1. Insert the instrument plug of the mains unit 0554 1096 into the
mains socket on the instrument.
2. Insert the mains plug of the mains unit into a mains socket.
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Rechargeable battery care:
• Do not store a discharged battery for an extended
period, fully charge before renewed use.
• Best storage conditions: 50-80 % residual capacity,
10 to 20°C / 50 to 68°F ambient temperature.
Due to the high energy requirement of the testo 338, it is
not possible to charge the battery while the instrument is
switched on.
illuminates when the battery is