Questions And Answers - TESTO 425 Instruction Manual

8.

Questions and answers

This chapter gives answers to frequently asked questions.
Question
is lit (bottom right
in display).
Instrument switches
itself off automatically.
-----
Display:
Display reacts slowly
uuuuu
Display:
ooooo
Display:
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
Possible causes
· Instrument battery is
almost spent.
Auto Off
· function
is switched on.
· Residual capacity
of battery is too low.
· Probe break.
· Ambient temperature
is very low.
· Permitted measuring
range was undershot.
· Permitted measuring
range was exceeded.
8. Questions and answers 31
Possible solution
· Replace instrument
battery.
· Switch function off.
· Replace battery.
· Please contact your
dealer or Testo
Customer Service.
· Raise ambient
temperature.
· Keep to permitted
measuring range.
· Keep to permitted
measuring range.