10. What if there are problems?
Problem
Device will not switch on
appears on the
display
The device will not switch
on although new batteries
have been inserted
LL.L
appears on the
display
HH.H.
appears on the
display
LL
appears on the display
HH
appears on the display
Device displays an
incorrect temperature and
relative humidity or does
not display them at all
Possible cause
Flat batteries
Batteries almost flat
The device is faulty
Room temperature
below -10°C (14°F)
Room temperature
above 50°C (122°F)
Relative humidity below
20%
Relative humidity above
95%
Changing environment
30
Solution
Insert new batteries
Insert new batteries
Contact Customer
Services
Room temperature
is outside the
measurement range
Room temperature
is outside the
measurement range
Relative humidity
is outside the
measurement range
Relative humidity
is outside the
measurement range
After initial use, it
may take 10 minutes
until the correct data
is displayed