INSTALLATION
2
13
OPTIWAVE X400
www.krohne.com
10/2017 - 4006413501 - AD NEPSI OPTIWAVE x400 R01 en
Connection and operation of the purging connection are the responsibility of the user. The
operator is also responsible for selection of a suitable fluid to purge the device.
Devices installed in a gas atmosphere
•
The purging fluid temperature must be less than the ignition temperature of the gas or
vapour atmosphere
Devices installed in a dust atmosphere
•
Dust clouds:
Dust clouds:
Dust clouds:
Dust clouds: The purging fluid temperature must be less than 2/3 of the ignition temperature
•
Dust layers (thickness <5 mm / 0.2
Dust layers (thickness <5 mm / 0.2
Dust layers (thickness <5 mm / 0.2
Dust layers (thickness <5 mm / 0.2
¨
):
):
):
): The difference between the purging fluid temperature
and the ignition temperature must be more than +75
°
C / +135
°
F
Devices installed in a gas or dust atmosphere
•
The purging fluid temperature must be between the minimum and maximum limits for the
gasket (for more data, refer to the handbook) and the type of antenna (for more data, refer to
Ambient and process connection temperatures
on page 14)
2.2.4 Optional heating/cooling system
This option is applicable to:
•
devices that have horn antennas, and
•
gas atmospheres
CAUTION!
If the 1/8 NPTF screw is removed from the purging connection, make sure that the installation
agrees with the Ex requirements for the purging system.
WARNING!
If the two conditions are applicable, then use the worst condition.
For data about dust layers thicker than 5 mm / 0.2
¨
, refer to General notes on page 10
Figure 2-4: Optional heating/cooling system
1
G
¼
or
¼
NPT heating/cooling system connection
