9 Maintenance
The positioner does not require any mainte-
nance.
There are filters with a 100
m mesh size in
the pneumatic connections for supply and
output which can be removed and cleaned,
if required.
The maintenance instructions of any up-
stream supply air pressure reducing stations
must be observed.
10 Servicing explosion-protected
devices
If a part of the device on which the explo-
sion protection is based needs to be ser-
viced, the device must not be put back into
operation until a qualified inspector has as-
sessed it according to explosion protection
requirements, has issued an inspection cer-
tificate or given the device a mark of confor-
mity.
Inspection by a qualified inspector is not re-
quired if the manufacturer performs a rou-
tine test on the device prior to putting it back
into operation. The passing of the routine
test must be documented by attaching a
mark of conformity to the device. Replace
explosion-protected components only by
original, routine-tested components from the
manufacturer.
Devices that have already been operated
outside hazardous areas and are intended
for future use inside hazardous areas must
comply with the safety requirements placed
on serviced devices. Before being used in-
side hazardous areas, test the devices ac-
cording to the specifications for servicing
explosion-protected devices.
EB 8394 EN 47
Maintenance
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