Technical data

88
HB EML3020 A-(en)LevelWave LR01
How to use the purge
7.3 Heating or cooling horn antennas under process conditions
A heating / cooling system option is available for DN150 / 6¨ and DN200 / 8¨ Metallic Horn
antennas. The outer surface of the antenna is sealed in a metal heating / cooling jacket.There is
an inlet and an outlet for the heating / cooling jacket on the top of the flange. For more data about
dimensions, refer to Dimensions and weights on page 108 (Purging and heating/cooling system
options).
It is also possible to use a purging system with the heating / cooling system. For more data, refer
to How to clean horn antennas under process conditions on page 87.
7.4 How to replace device components
7.4.1 Service warranty
Servicing by the customer is limited by warranty to:
• The removal and installation of the device.
• Compact version: The removal and installation of the signal converter (with the weather
protection, if this option is attached). For more data, refer to How to turn or remove the signal
converter on page 35.
• Remote (field) version: The removal and installation of the remote converter and/or the
antenna housing. For more data, refer to How to turn or remove the signal converter on page
35.
For more data on how to prepare the device before you send it back, refer to Returning the device
to the manufacturer on page 89.
Process conditions How to use the purge
The device is colder than other
elements in the process. It is
possible that there will be
condensation in the antenna.
Continuous use. Use low-pressure gas to remove condensation from
the antenna.
There is a risk of build-up in the
antenna
Purge at intervals. Use compressed air, nitrogen or another gas that
is applicable to the process up to 6 bar / 87 psi.
There is a build-up or risk of
build-up in the antenna
Purge at intervals. Use a liquid (hot water, solvent or another liquid
that is applicable to the process) to melt the liquid that has
crystallized on the antenna.
WARNING!
Make sure the the pressure in the heating / cooling system is not more than 6 bar / 87 psi.
Make sure that the flange temperature is not more than the maximum limit. For more data, refer
to Technical data on page 93.
WARNING!
Only approved personnel can do an inspection of the device and repairs. If you find a problem,
send the device back to the supplier for inspection and/or repairs.
INFORMATION!
The converter housing (compact or remote version) can be detached from the process
connection assembly under process conditions. For more data, refer to How to turn or remove
the signal converter on page 35.