Samson 3969, Монтаж и эксплуатация

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44 EB 3969 EN
EX 3969 EN
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EXPLOSION PROTECTION INSTRUCTIONS · TYPE 3969
Version 2019-04-30
Selecting cables and wires
Observe the relevant clauses of EN 60079-14 for installation of intrinsically safe circuits. Seal
cable entries left unused with plugs.
1.2 Servicing explosion-protected devices
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 according
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 manufacturer performs a routine test on
the device before putting it back into operation. Document the passing of the routine test 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 future
use inside hazardous areas must comply with the safety requirements placed on serviced devic -
es. Before being operated inside hazardous areas, test the devices according to the specifica -
tions for servicing explosion-protected devices.
1.3 Maintenance, calibration and work on equipment
Interconnection with intrinsically safe circuits to check or calibrate the equipment inside or
outside hazardous areas is to be performed only with intrinsically safe current/voltage
calibrators and measuring instruments to rule out any damage to components relevant to
explosion protection.
Observe the maximum permissible values specified in the certificates for intrinsically safe cir
-
cuits.
Use with flammable gases in hazardous areas
Risk of fatal injury as a result of electrostatic discharge at the device.
In hazardous areas (with type of protection Ex t), mount the device in such a way that electro-
static charging cannot take place.
DANGER
!