Metrohm 909 UV Digester - Manual (Page 43)

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7 Operation and maintenance
909 UV Digester
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Inserting the new UV lamp
1 Insert the new UV lamp in accordance with Chapter 3.2, page 9.
Configuring parameters for the new UV lamp
1 Reset the counters to zero for the number of operating hours and
the number of times the lamp has been switched on under Lamp
setup
▶ Reset Counters (see "Reset counters", page 22).
2 Set the number of operating hours for the new UV lamp under
Lamp setup ▶ Replace after (see "Replace after", page 22).
We recommend 750 h of operating time.
7.2.2 Clearing a jammed fan
The wet end with inserted sample holder is designed so that no parts such
as PTFE stoppers can fall down. If the fan happens to get jammed anyway,
keep the following safety instruction in mind:
Warning
Jammed fan
Improper work on the fan may result in injuries.
Ensure that the instrument is unplugged before clearing the jammed
fan.
Proceed as follows to remove PTFE stoppers that have fallen into the wet
end of the 909 UV Digester:
1 Remove the sample holder.
2 Turn the instrument upside down.
3 Gently shake the overturned instrument until the PTFE stoppers come
out.