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10.4
Cleaning the front screens
The front screens on the transmitters and receivers must be cleaned regularly
depending on how dirty they are. If the orange LED3 on the receiver is on with free
protective field (LED1 is green) a "weak signal reception" is indicated. The collective
"malfunction/dirt" signal is provided on the 6/Pin6 connecting terminal in the factory
setting (depending on the machine interface variant). The dirt signal is generated with
time filtering (10 min) from the internal weak beam signal. If this signal is activated,
then cleaning of the front screen may be required with free protective field and
switched LED3. If cleaning the screens does not improve this, the range and alignment
must be checked. We recommend using a mild cleanser for cleaning the plexiglass
cover screens.
The screens are resistant to thinned acids or alkalis and resistant to organic solvents
within limits.
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