Operation; Mains Unit/Rechargeable Battery; Changing The Battery - TESTO 335 Instruction Manual

E. Operation
This chapter describes the steps that have to be executed frequently when using the
product.
Please read this chapter carefully. The following chapters of this document will
assume you are already familiar with the content of this chapter.
E.1 Mains unit/rechargeable battery
If the mains unit is connected, the measuring instrument is automatically powered from
the mains unit. It is not possible to charge the rechargeable battery in the measuring
instrument during operation.
E.1.1 Changing the battery
The measuring instrument must not be connected to a mains socket via the mains
unit. The measuring instrument must be switched off. Change the rechargeable bat-
tery within 60 minutes, otherwise instrument settings (e.g. date/time) will be lost.
1 Place the measuring instrument on its front.
2 Remove the service cover: Take hold of it at the
markings (arrows) using the index finger and
thumb, press slightly, fold up and remove.
3 Open the rechargeable battery compartment:
Press the orange key and push in the direction of
the arrow.
4 Remove the rechargeable battery and insert a new
one. Use only Testo 0515 0100 rechargeable bat-
teries!
5 Close the rechargeable battery compartment:
Press the orange key and push against the direc-
tion of the arrow until the rechargeable battery
engages.
6 Fit the service cover and clip into place.
E.1 Mains unit/rechargeable battery
E. Operation
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