User Manual
SERVICE
7
81
OPTIWAVE 7400-24 C
www.krohne.com12/2015 - 4004901901 - MA OPTIWAVE7400-24 R01 fr
7.1 Periodic maintenance
7.2 How to clean the top surface of the device
Obey these instructions:
• Keep the thread of the terminal compartment cover clean.
• If dirt collects on the device, clean it.
7.3 How to clean horn antennas under process conditions
If it is possible that there will be build-up, a purging option is available for horn antennas.
For more data, refer to the table that follows:
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:
Compact version:Compact version:
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:
Remote (field) version:Remote (field) version:
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 84.
INFORMATION!
For more data about regular inspections and maintenance procedures for devices with Ex and
other approvals, refer to the related supplementary instructions.
WARNING!
Do not let more than 5 mm / 0.2
¨
of dust collect on the top surface of the device. This is a
possible source of ignition in a potentially explosive atmosphere.
CAUTION!
Purge the antenna at intervals to make sure that the inner surface of the antenna stays clean
and the device measures accurately.
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
.