AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B 307
Limas21 UV, Limas21 HW: Lamp (EDL) replacement
NOTE
Any maintenance and repair of optical parts requires wearing clean cotton
gloves!
CAUTION
When working on the gas analyzer while energized and with the case
open, personal protective equipment to protect the eyes and skin from
UV radiation must be worn (goggles and gloves). Operating the EDL out-
side the analyzer system is not allowed. The reason is the potentially
dangerous emission of UV radiation in the wavelength range 190 to
400 nm. The safety glasses to be used must be suitable for UV protection
according to EN 166 (yellow lenses are recommended).
When should the lamp be replaced?
The Electrodeless Discharge Lamp (EDL) has a limited lifetime. Lamp re-
placement operations shall be accounted for maintaining analyzer function-
ality over the time.
The analyzer notifies the user about reduced source intensity through a
dedicated analyzer status message (see page 322) (No. 358). Upon notifica-
tion of such message, an investigation of root cause has to be planned and
in case of lamp intensity being significantly reduced, a preventive lamp
change shall be planned within the shortest turnaround possible.
When the source intensity reaches a value at which the short-term stability
of the smallest measurement range becomes too low, the analyzer notifies a
lamp failure message (No. 359). In this case the lamp must be replaced im-
mediately.
Determining lamp service life
Lamp service hours are displayed in the Maintenance/Test →
Analyzer spec. adjustm.
→ Amplification optimization menu.
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