User manual
41
Maintenance and cleaning
11 Maintenance and cleaning
The device does not require you to carry out any
maintenance other than replacing the battery
when necessary. Enlist the help of an expert to
carry out any maintenance or repairs.
Clean the device using a soft, lint-free cloth that is clean
and dry. You may dampen the cloth a little with lukewarm
water in order to remove more stubborn marks. Do not
use any detergents containing solvents, as they could
corrode the plastic housing and label.
12 General information about radio
operation
Radio transmission is performed on a non-exclusive
transmission path, which means that there is a possibility
of interference occurring. Interference can also be caused
by switching operations, electrical motors or defective
electrical devices.
The range of transmission within buildings can
dier greatly from that available in the open air.
Besides the transmitting power and the
reception characteristics of the receiver,
environmental factors such as humidity in the
vicinity have an important role to play, as do on-
site structural/screening conditions.