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MEASUREMENT/CALIBRATION/SWITCHING (SHUT) OFF
90002929(6) NGA-MLT e 30.10.99
Rosemount Analytical
SWITCHING (SHUT) OFF
Be sure to observe the safety regulations for the respective gases
(sample gas and test gases / span gases) and the gas bottles !
Pressure of sample gas / test gases normally max. 1,500 hPa !
7.3 Switching (Shut) Off
Before switching off the analyzer, we recommend first purging all the gas lines for about 5
minutes with zeroing gas (N
2
) or adequate conditioned air. The full procedure for shutting off
is as follows:
All analyzers with electrochemical O
2
cell have to be purged with conditioned
ambient air prior to disconnect the gas lines !
Then the gas line fittings have to be closed for transport or depositing analyzer.
❍ Admit zeroing gas at the respective gas inlet fitting.
❍ Set the gas flow to permissible rate.
After 5 minutes have elapsed:
❍ Switch off by disconnecting the voltage supply.
❍ Shut Off the gas supply.
❍ Disconnect gas lines.
❍ Close all gas line fittings immediately.