User's Manual

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4.6 Changing the batteries
CAUTION
Incorrectly inserted batteries!
The instrument may be damaged!
- Check the polarity when inserting the batteries.
1 - Open battery compartment cover.
2 - Change batteries. Check the
polarity.
3 - Close the battery compartment.
4.7 Calibration
The WiFi data loggers are supplied with a factory calibration certificate
as standard.
In many applications, it is recommended that you recalibrate the
loggers every 12 months.
This can be carried out by Testo Industrial Services (TIS) or other
certified service providers with the aid of easy-to-use service software.
Please contact Testo for further information.