ABB EL3000 Series, Руководство пользователя, Страница: 105 / 128

EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. B 105
Purge the sample gas path
Purge before start-up
Prior to starting up the gas analyzer and feeding in the sample gas, the
sample gas feed path and, where necessary, the wall-mount housing must
be purged (see page 39).
One reason is to ensure that the sample gas path and the wall housing are
free of contamination, e.g. corrosive gases and dust deposits, during
start-up.
Another reason is to prevent any explosive gas/air formations that may be
present in the sample gas feed path or the wall- mount housing from ignit-
ing when the power supply is activated.
Purge gas: Nitrogen
Purging of the gas feed path: Purge gas flow max. 100 l/h,
duration approx. 20 s
Purging of the wall-mount housing: Purge gas flow max. 200 l/h,
duration approx. 1 h
If the purge gas flow is lower than specified, the duration of the purging
must be extended accordingly.