EB 9527-3 EN
35
Servicing explosion-protected devices
11 Servicing explosion-protected
devices
If a part of the Media 6 on which the explo-
sion protection is based needs to be ser-
viced, it must not be put back into operation
until a qualified inspector has assessed it ac-
cording to explosion protection require-
ments, has issued an inspection certificate or
given the device a mark of conformity.
Inspection by a qualified inspector is not re-
quired if the manufacturer performs a rou-
tine test on the device before putting it back
into operation. Document the passing of the
routine test by attaching a mark of conformi-
ty to the device.
Replace explosion-protected components on-
ly with original, routine-tested components
from the manufacturer.
Devices that have already been used outside
hazardous areas and are intended for future
use inside hazardous areas must comply
with the safety requirements placed on ser-
viced devices. Before being operated inside
hazardous areas, test the devices according
to the specifications in EN 60079-17: Explo-
sive Atmospheres - Part 17: Electrical instal-
lations inspection and maintenance.
11.1 Firmware update
Firmware updates on differential pressure
meters currently in operation can be per-
formed as follows:
When updates are performed by a service
employee appointed by SAMSON, the up-
date is confirmed on the positioner by the
test mark assigned by SAMSON’s Quality
Assurance.
In all other cases, only plant operator per-
sonnel with written approval may perform
updates. Updates are to be confirmed by ap-
proved personnel on the device.
Laptops and computers connected to the
power supply must
not
be used without an
additional protective circuit.
This does not apply to laptops in battery op-
eration. In this case, it is assumed that a bat-
tery-powered laptop runs briefly for software
programming or testing purposes.
Updates outside the hazardous area
Remove the differential pressure meters.
Update them outside the hazardous area.
Updates on site
Updates on site are only permitted after the
plant operator presented a signed hot work
permit.
After updating has been completed, add the
current firmware to the nameplate; this can
be done using a label.
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