8 – Routine maintenance
MultiExact Gas Analyser
8.5
CO
2
scrubber
8.5.1 For 0-10ppm CO
2
The scrubber fitted to the 0-10ppm CO
2
requires changing every 2 – 4 years
depending on installation practices.
If the T90 – T100 response degrades significantly from the performance observed
when the analyser was commissioned, then this may indicate that the scrubber
requires changing.
Contact Servomex or your local Servomex agent for instruction on how the scrubber
can be changed.
8.5.2 For 0-500ppm CO
2
The scrubber fitted in the 0-500ppm CO
2
sealed transducer requires changing after 10
years of normal operation.
8.6
Use of the analyser with toxic gases
WARNING
If toxic gases are present in the gas stream, the concentrations of the
gases sampled or used for calibration of the analyser may be above
their respective threshold limit values, so:
•
You must regularly leak-test the analyser and associated
equipment.
•
If any leaks are found, do not continue to use the analyser or
associated equipment until appropriate corrective action has
been taken.
We recommend that you leak-test the analyser at least once every
6 months:
•
If there are leaks within the analyser, it must be returned to
Servomex for repair. Do not continue to use the analyser.
•
You must seal any leaks in your sample pipelines or system.
CAUTION
When you carry out a leak test, do not exceed a maximum pressure of
34.5 kPa gauge (0.35 bar gauge, 5 psig) and do not introduce a sudden
change of pressure into the analyser. If you do, you may damage the
analyser. We recommend that you allow at least 30 seconds to fully
pressurise the analyser to the maximum pressure.
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05410001A / Revision 6
