3.7.2
Connecting hose SR-unit - junction box
The connecting hose between the SR-unit and the junction box
•
is part of the pressurized enclosure.
•
contains electrical connection cables.
•
is under overpressure.
3.7.3
Intrinsically safe measuring probe (GMP probe)
•
Measuring probe with open measuring gap.
•
Without electronics and therefore intrinsically safe.
•
Protection against contamination: Ex approved purge air unit.
3.8
Ex purge air unit
•
The purge air unit supplies filtered ambient air to the purge air fixtures.
•
Protects the windows of the SR-unit from contamination and high gas tempera‐
tures.
•
A purge air unit for connection to the SR-unit.
•
The purge air is blown into the gas duct through the “flange with tube”.
NOTE
Further information on the purge air unit, see Operating Instructions of the purge air
unit.
DANGER
Risk of explosion by suctioning air from Ex zone 1
The Ex purge air supply may not suction air from Ex zone 1.
b
Observe zone separation of the purge air supply, air may be suctioned only from
the non-Ex zone or from Ex zone 2.
3
PRODUCT DESCRIPTION
24
O P E R A T I N G I N S T R U C T I O N S | GM32-Ex
8015558/YYJ8/V1.7/2016-07 | SICK
Subject to change without notice