Commissioning; Inserting The Battery/Rechargeable Battery; Connecting The Mains Unit - TESTO 521 Instruction Manual

4. Commissioning

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4.1 Inserting the battery / rechargeable battery
4. Commissioning
Charge batteries properly!
Danger of explosion!
Only start the charging process if a recharge-
Caution
able battery is in the instrument and Rech.
has been set as the battery type.
4.1 Inserting the battery /
rechargeable battery
(Rechargeable battery type: NiMH IEC 6F22)
1 Open the battery compartment on the rear of the
instrument.
2 Insert the monobloc battery / rechargeable battery.
Observe +/-.
3 Close the battery compartment.
To avoid the loss of data, it is imperative that you
switch the instrument off when changing the
battery/rechargeable battery and replace the
battery in < 10 min.
4.2 Using the power unit
The instrument can be operated with mains unit
0554 0088, without a battery/rechargeable battery.
The instrument switches on automatically when the
power unit is connected.
It is normal for the mains unit to warm up. The mains
unit has a thermostatic switch to protect it against
overheating.