5
SERVICE
16
OPTIWAVE-M 7400
www.krohne.com
10/2018 - 4007039501 - AD ATEX OPTIWAVE-M 7400 R01a
5.1 Periodic maintenance
In normal operational conditions, no maintenance is necessary. Only the manufacturer can
repair the device and replace components. If it is necessary, maintenance must be done by
approved personnel (the manufacturer or personnel approved by the manufacturer).
5.2 Keep the device clean
Obey these instructions:
•
Keep the device clean to prevent dust contamination.
•
Do not blow dust with compressed air.
•
Clean the device with a damp cloth.
5.3 How to remove the device
The installation and removal of the device or the signal converter is a task for approved
personnel (operator, fitter, electrician etc.). If you must change the signal converter or all of the
device, refer to the procedures in the handbook.
If you must do work in a hazardous location:
•
Disconnect the electrical wires. For more data refer to
How to open the terminal
compartment
on page 11.
•
Before you remove the device from the process connection, make sure that the tank is not
pressurized. A pressurized tank can cause injury to persons when they do work on it.
•
Make sure that all electrical wires are isolated from the ground. This is also applicable to
Protective Earth (PE), Functional Earth (FE) and equipotential bonding conductors.
CAUTION!
Do not replace an Ex i electronic block with a different block that is from a device which does not
have an intrinsically-safe barrier.
Do not use connectors in the signal converter housing or open the cover to change the device
configuration when there is an explosive atmosphere. Maintenance can only be carried out by
"Personnel trained in explosion protection".
DANGER!
If dirt collects on the device, clean it with a damp cloth.
Do not use cleaning agents which can cause damage to the paint, the boundary wall (the PTFE
process seal), the EPDM housing gaskets and the process connection gaskets (FKM/FPM or
Kalrez
®
). Also make sure that the cleaning agent does not remove the data printed on the
nameplate.
If you use the incorrect cleaning agent (i.e. the device is not resistant to corrosion by your
cleaning agent), do not use the device in a hazardous location. If aid is necessary, speak or write
to the supplier.
