9 Maintenance
The positioner does not require any mainte
-
nance.
There are filters with a 100
µ
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 positioner on which the ex
-
plosion protection is based needs to be ser
-
viced, the positioner must not be put back
into operation until an expert has inspected
the device according to explosion protection
requirements, has issued a certificate stating
this or given the device a mark of confor
-
mity.
Inspection by an expert is not required if the
manufacturer performs a routine test on the
device prior to putting it back into opera
-
tion. The passing of the routine test must be
documented by attaching a mark of confor
-
mity to the device.
64 EB 8387-3 EN
Maintenance
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