Servomex 07931001B, Operator'S Manual

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© Servomex Group Limited. 2020 07931001B revision 6
Purging gases are potential asphyxiants ensure adequate ventilation is
provided.
The Analyzer may fail if you use materials to connect the Laser 3 Plus to
the process that are not compatible with the application gasses.
For analyzers with a duel measurement capability, span-gases in the in-
line validation cell can affect the second measurement. It therefore
should not be relied upon during the validation process.
Ensure the in-line validation cell is properly flushed with zero-gas by
setting appropriate purge times on completion of the validation process,
otherwise measurement accuracy in normal operation may be
compromised.
Safety critical installations must ensure the validation gas supplies are
monitored to ensure correct gases are present.
Note
: As the test is performed swiftly, it is assumed that the process conditions will be
reasonably stable during this procedure.
Note : Filters must be turned off before validation. (Ref section 4.7)
Note : Check the validation gas type and concentration.
Stability Measurement
At various points during the validation process, the analyzer will check the stability of
both the measurement concentration and the transmission. This is to ensure that a
meaningful test result can be obtained. If at any point the measurement or
transmission is found to be outside the stability criteria, the validation process will be
halted and the analyzer will exit back to normal operation after informing the
operator.
The stability of both the measurement and the transmission is calculated as a
percentage Standard Deviation. The Standard Deviation values are calculated five
times per second.
In order to be judged as being stable, both the measurement and the transmission
Standard Deviation must be below a preset threshold level and must remain below
that level for a preset period of time. Both the stability threshold level and the
stability time can be set by the operator.