8
Operation
8.1
Safety
WARNING
Danger for persons and system caused by unsafe operation of the measuring system
If the device is or could be in an unsafe state:
b
Put the device out of operation.
b
Disconnect the device from the main power supply and signal voltage.
b
Prevent unauthorized or unintentional start-up.
NOTE
More information concerning the detection of unsafe operating states,
8.1.1
Check before start-up
Before every start-up
b
Check that all enclosures are closed
–
Enclosure cover
–
Cable inlets
–
Enclosure openings
b
Ensure the permanent feed of protective gas,
.
8.2
Start-up procedures for GM32 Ex versions
Start-up procedure for GM32 category 3G
1
Switch the main power supply of the pressurized enclosure system on (at an exter‐
nal source).
2
The pressurized enclosure system will start pre-purging the enclosure with protec‐
tive gas. The Ex control unit will signal the end of the pre-purge phase.
3
Switch the main power supply of the GM32 Ex on (at an external source).
Start-up procedure for GM32 category 2G
1
Switch the main power supply of the pressurized enclosure system on (at an exter‐
nal source).
2
The pressurized enclosure system will start pre-purging the enclosure with protec‐
tive gas.
3
The GM32 Ex will be switched on automatically after a few minutes.
OPERATION
8
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
63
Subject to change without notice