1
Figure 24: Protective gas connection on GM32 Ex category 2G and
3G
1
Protective gas inlet:
- Thread G3/8“ or
- hose connection for 8 mm diameter
7.6.1
Feeding protective gas
NOTICE
The pressurized enclosure requires a permanent supply of a protective gas.
b
Feed the protective gas via the protective gas connection.
More information concerning protective gas:
–
Requirements for protective gas,
.
–
Protective gas outlet:
see "Protective gas outlet", page 33
.
7.7
Start-up of the purge air supply
CAUTION
Risk of device damage caused by inadequate purge air pressure
The purge air supply protects the measuring system from contamination and overheat‐
ing. If the purge air pressure is inadequate, the purge air can not enter the gas duct.
This can result in inadequate provision with purge air and therefore a device failure.
b
Ensure the purge air pressure is adequate to force the purge air into the gas duct.
b
If you have questions concerning the purge air pressure, contact SICK Customer
Service or your local SICK representative.
COMMISSIONING
7
8015558/YYJ8/V1.7/2016-07 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM32-Ex
55
Subject to change without notice
