Emerson Rosemount CT5400, Installation, Operation And Maintenance Manual

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8.2 Shutdown procedure
To shut down the analyzer, perform the following steps:
DANGER!
EXPLOSION HAZARD
Always lock-out the gas handling system when shutting down the analyzer. Unauthorized
operation of the gas handling system when maintenance is being performed on the analyzer or
its associated pipes/hoses may result in hazardous gas being released, causing fire or
explosion. Failure to lock-out gas handling system may cause death.
Procedure
1. Shut down the gas handling system that conditions the sample gas and feeds it to
the analyzer. Always lock-out the gas handling system to prevent its unauthorized
operation during maintenance, which may cause an escape of gas.
DANGER!
EXPLOSION HAZARD
The sample gas in the system must be vented to prevent fire or explosion during
maintenance and to prevent damage to the analyzer during shutdown.
The sample gas in the pipes leading to the analyzer must be purged to prevent hazards
to personnel during maintenance. Purging the sample gas must be done in accordance
with the safe working procedures for the site.
Allow the analyzer and system for returning the sample gas to run for five minutes to
allow any sample gas in the instrument to be returned to the exhaust.
Failure to vent sample gas may cause death.
2. Purge any sample gas in the pipe/hose from the gas handling system to the analyzer
using factory air or nitrogen supply.
3. Allow the analyzer to run for five minutes with the purge gas connected, so that any
sample gas in the instrument is vented to the exhaust. On the display controller,
check that the gas concentrations read
0 ppm before stopping the purge flow.
WARNING!
HIGH PRESSURE GAS AND AIR
The calibration gas supply and compressed air supply operate at a pressure that can
cause injury, e.g., damage to eyes and skin punctures from debris blown by the high
pressure gas or compressed air.
Always lock out or tag off the calibration gas supply and compressed air supply when
shutting down the analyzer.
Shutdown procedure
140 Rosemount CT5400