KROHNE OPTIWAVE 7300 IECEx - Manual (Page 8)

2
INSTALLATION
8
OPTIWAVE 7300 C
www.krohne.com 10/2010 - 4000176502 - AD IECEX OPTIWAVE7300 R02 en
2.1.3 Special conditions
2.1.4 Optional purging system
The purging system is supplied as an option for devices that have horn antennas.
Figure 2-2: Risk of ESD
1 Sun cover
2 Drop antenna
3 Flange plate protection (option for the Drop antenna)
WARNING!
Aluminium housing: Possible source of ignition in a potentially explosive atmosphere. The
housing is made of either aluminium alloy or stainless steel. If the device has an aluminium
alloy housing, make sure that iron/steel objects do not hit or rub against the device.
Figure 2-3: Optional purging system
1 ¼ NPTF purging connection (optional)
INFORMATION!
If delivered with the device, the purging connection is plugged with a
¼ NPTF screw and engaged
on a minimum of 3
½
threads.