DANGER
Danger to life by leaking hot/toxic gases
Hot and/or noxious gases can escape during work on the gas duct, depending on the
plant conditions.
b
Work on the gas duct may only be performed by skilled technicians who, based on
their technical training and knowledge as well as knowledge of the relevant regula‐
tions, can assess the tasks given and recognize the hazards involved.
Electricity
Observe all safety information in Chapters Commissioning and Electrical installation.
see "Safety information on commissioning", page 47
Device damage
CAUTION
Risk of device damage when the optics purge air is switched off too soon
Hot and contaminated gas can cause device damage when the optics purge air is
switched off when the measuring device is still in the gas duct.
b
Do not switch the purge air unit off as long as the measuring device is still in the
gas duct.
11.2
Decommissioning Ex-relevant subassemblies
1
Disconnect the GM700 Ex from the main power supply.
2
Wait 20 minutes before opening the device.
3
Disconnect the Ex control unit from the power.
NOTE
The analyzer can remain on the gas duct as long as the purge air supply is in oper‐
ation.
CAUTION
Device damaged caused by unnoticed purge air failure
After the GM700 Ex has been disconnected from the power, there is no message
via the analyzer for a purge air failure.
b
Install suitable monitoring
or
b
remove the respective subassemblies.
11.3
Removing the device
Material required
Part number Required for
Flange cover
--
Covering the flange
Personal protective equipment
--
Protection when working on the stack or hot or
aggressive sample gases
DECOMMISSIONING
11
8019532/100Q/V1-1/2018-08 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM700 Ex
87
Subject to change without notice