User manual

8. Questions and answers30
8. Questions and answers
This chapter gives answers to frequently asked questions.
Question Possible causes Possible solution
is lit (bottom right · Instrument battery is · Replace instrument
in display). almost spent. battery.
Instrument switches · Auto Off function · Switch function off.
itself off automatically. is switched on.
· Residual capacity · Replace battery.
of battery is too low.
Display:
----- · Probe break. · Please contact your
dealer or Testo
Customer Service.
Display reacts slowly · Ambient temperature · Raise ambient
is very low. temperature.
Display: uuuuu · Permitted measuring · Keep to permitted
range was undershot. measuring range.
Display: ooooo · Permitted measuring · Keep to permitted
range was exceeded. measuring range.
If we are unable to answer your question, please contact
your dealer or Testo Customer Service. For contact data,
see back of this document or web page
www.testo.com/service-contact.