6
Questions and answers
20
The probes are supplied with a factory calibration protocol as
standard.
Recalibration of the probes once every 12 months is recommended in
many applications.
This can be carried out by Testo Industrial Services (TIS) or other
certified service providers with the aid of easy-to-
Question Possible cause / solution
LED status display flashes
red
Batteries are almost empty. Change the
batteries.
The probe switches itself off Remaining battery capacity is too low. Change
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