LDS 6
Operating Instructions, 01/2009, A5E00295894-05
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Maintenance and Service
6
6.1 General about Maintenance and Service
During normal use, the central unit LDS 6 requires no service. The sensor with its optical
surfaces will need regular maintenance. Depending on application and purging method, the
interval of maintenance may vary from 1 to 12 months.
If the transmission in a channel drops below the level set by the user, the transmission alarm
will be activated. The sensor in this channel needs to be serviced by cleaning the wedge
windows or realigning the optical path. For details on Maintenance and service of the sensor
delivered with your system, please refer to the corresponding sensor manual.
6.2 Cleaning the Central Unit
CAUTION
Always make absolutely sure that no water gets into the unit during cleaning.
Failure to do so may result in a breakdown of the unit!
Use only a dry cloth without any cleaning agents. Since the central unit contains optical
surfaces great care should be taken when cleaning. Only outer surfaces may be cleaned.
6.3 Cleaning the Wedge Windows
Before the sensors are removed make sure that:
● no purging is active
WARNING
Steam purging
Particularly when using steam for purging it is absolutely mandatory to turn it off since
overheated steam is not visible!
Failure do do so may result in severe burn damages!
● No hazardous or hot gases can escape from the process.
● Appropriate protection against hot surfaces on and around the sensor is used.
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