HT instruments iDM70 - Manual (Page 22)

iDM70
EN - 21
7. ERROR MESSAGES ON THE DISPLAY
Code Description Solution
204 Calculation error
Press and repeat
procedure
208
Weak signal reflection,
measuring time too
long, distance > 70m or
<5cm
Carry out measurement
on an appropriate
surface
209
Too intense reflection of
the signal
Carry out measurement
on a less reflective
surface
252 Temperature too high
Let the instrument cool
down
253 Temperature too low
Let the instrument heat
up
255 Hardware error
Turn off the instrument
and turn it on again
several times. Contact
Customer Service if the
message is displayed
again.