Care And Maintenance - TESTO 425 Instruction Manual

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7. Care and maintenance

7. Care and maintenance
This chapter describes the steps that help to maintain the
functionality of the product and extend its service life.
Cleaning the housing:

Clean the housing with a moist cloth (soap suds) if
>
it is dirty. Do not use aggressive cleaning agents or
solvents!
Changing the battery/rechargeable battery:

The instrument is switched off.

To open the battery compartment on the rear of the
1
instrument, push the lid of the battery compartment in
the direction of the arrow and remove it.
Remove the spent battery/rechargeable battery and
2
insert a new battery/rechargeable battery
(9 V monobloc). Observe the polarity!
To close the battery compartment, replace the lid
3
of the battery compartment in position and push it
against the direction of the arrow.