Emerson Rosemount CT4400 Reference Manual page 86

Troubleshooting and diagnostics
January 2020
DANGER
FAILURE TO VENT SAMPLE GAS
The sample gas in the system must be vented to prevent fire or explosion during
maintenance and to prevent damage to the analyzer during startup.
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 system to be returned to the exhaust.
WARNING
HEAVY ITEM
Handle the analyzer with caution during unpacking, installing, maintaining, and
transporting to prevent crushing of hands, feet, or other body parts.
The analyzer weighs 33 lb (15 kg) for the half rack system and 66 lb (30 kg) for the full rack
system. Rosemount recommends that the analyzer is moved by a minimum of two people
when lifting and transporting the equipment.
Failure to properly handle the analyzer may cause injury to personnel, wear suitable
protective gloves and protective footwear.
Procedure
1. Turn the ON/OFF switch on the back panel to OFF .
2. Disconnect the external power supply from the power socket.
3. VERIFY the sample gas handling system has been shut down and locked-out/
4. The sample gas supply in the system MUST be vented to prevent fire or explosion
5. Allow the analyzer to cool.
6. Disconnect all external cables. (Tag if necessary).
7. Disconnect, cap and label the tubing at the back of the analyzer connecting to the
8. Remove the analyzer from the rack and place on a flat, stable surface that can
86
tagged-out.
during maintenance.
sample handling system.
accommodate the weight of 33 lb (15kg) for the half rack and 66 lb (30 kg) for the
full rack system. This step requires two people to lift and transport the analyzer.
Reference Manual
00809-0100-4244
Rosemount CT4400