Service And Maintenance; Changing The Battery; Questions And Answers - TESTO 831 Mode D'emploi

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8. Settings
- Instrument is switched off.
If no button is activated in the setting mode for 3 s, the
instrument changes to the next mode.
1 Press
- The device switches to settings mode.
2 Set lower alarm value ( ALARM): Press
button down to go forward quickly.
3 Set upper alarm value ( ALARM): Press
button down to go forward quickly.
4 Set alarm function on / oFF: Press
5 Select parameter (°C / °F) : Press
- The device returns to IR measurement view.
If the set alarm values are exceeded/not reached, a visual and
acoustic alarm is output.

9. Service and Maintenance

9.1 Changing the battery

9.2 Clean instrument
Do not use abrasive cleaning agents or solutions.
Clean the housing with a damp cloth (soap water).
Carefully clean the lens with water or cotton buds dipped in
water or medical alcohol.

10. Questions and Answers

Query
Display is no longer illuminated - Low battery.
lights up.
Instrument cannot be
switched on
Infrared measurement mode:
- - - lights up.
If we have not answered your question, please contact your local
distributor or Testo´s Customer Service.
for 3 s.
Instrument must be switched off!
1 Open battery compartment:
Open up cover.
2 Remove used battery and insert new
one. Observe +/-. The minus should be
visible once the battery is inserted.
3 Close battery compartment: Close
cover.
Possible causes
- Battery empty.
- Battery empty.
- Readings outside
measurement range.
or . Hold the
or . Hold the
or .
or .
Possible solution
Change battery.
Change battery.
Change battery.
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