Samson TROVIS 3730-1, Перевод оригинальной инструкции

Страница: 12 / 144

1-6 EB 8484-1 EN
Safety instructions and measures
1.4 Special instructions concerning explosion protection
If a part of the device on which the explosion protection is based needs to be serviced, the
device must not be put back into operation until a qualified inspector has assessed it accord -
ing to explosion protection requirements, has issued an inspection certificate, or given the
device a mark of conformity. Inspection by a qualified inspector is not required if the manu
-
facturer performs a routine test on the device before putting it back into operation and the
passing of the routine test is documented by attaching a mark of conformity to the device.
Replace explosion-protected components only with original, routine-tested components by the
manufacturer.
Devices that have already been operated outside hazardous areas and are intended for fu-
ture use inside hazardous areas must comply with the safety requirements placed on serviced
devices. Before being operated inside hazardous areas, test the devices according to the
specifications for servicing explosion-protected devices.
Maintenance, calibration and work on equipment
Î
Only use intrinsically safe current/voltage calibrators and measuring instruments for in -
terconnection with intrinsically safe circuits to check or calibrate the equipment inside or
outside hazardous areas.
Î
Observe the maximum permissible values specified in the certificates for intrinsically safe
circuits.
Equipment with type of protection Ex nA
Î
In equipment operated with type of protection Ex nA (non-sparking equipment), only con -
nect, isolate or switch circuits while energized during installation, maintenance or repair.
Î
Use certified cable glands and blanking plugs with appropriate type of protection and
IP rating ≥ 6X and suitable for the certified temperature range.
Î
Connect the signal circuit using screw terminals (terminal 11/12) for electrical conductors
with a wire cross-section from 0.2 to 2.5 mm². The tightening torque is 0.5 to 0.6 Nm.
Equipment with type of protection Ex t
Î
In equipment operated with type of protection Ex t (protection by enclosure), only con -
nect, isolate or switch circuits while energized during installation, maintenance or repair.
Î
While working on the device during operation in potentially explosive dust atmospheres,
be aware that opening the housing cover may cause the explosion protection to become
ineffective.