Metrohm 909 UV Digester - Manual (Page 42)

7.2 Care
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909 UV Digester
7.2 Care
7.2.1 Maintaining and replacing the UV lamp
Keep the following information in mind so that the lifetime of the UV
lamp is not shortened unnecessarily:
￭ Clean the UV lamp as needed using a clean towel wetted with pure
alcohol. This lets you remove particles from the quartz glass that have
not yet been burned in.
Do not touch any part of the UV lamp other than the two flattened
ends during cleaning and wear the provided cotton glove when remov-
ing or installing the lamp.
￭ Avoid switching the UV lamp on and off unnecessarily. Each time the
lamp is switched on shortens its lifetime.
Removing the old UV lamp
Warning
Risk of electric shock due to defective electronic components
Coming into contact with potentially defective electronic components
in the instrument could result in an electric shock.
Ensure that the instrument is unplugged before replacing the UV lamp.
Proceed as follows:
1 Ensure that the wet end has cooled completely.
2 Remove the sample holder from the wet end if it has been inserted.
3 Put on the glove included with the UV lamp.
4 Hold the UV lamp by the upper flattened end and gently press it
down.
5 While holding the UV lamp down, release the upper end from the
lamp socket.
6 Take the UV lamp out of the lower lamp socket and remove it from
the wet end.