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DON-H
page 38
DON-H
01/0721
15.2.5
Commissioning, installation
Depending on the IP degree of protection, the time for cleaning the equipment
(dust deposits) must be specified. Other important facts:
a) The product may only be put into operation in Zone 2 (Cat. 3G, EPL Gc) or in
Zone 1 (Cat. 2G, EPL Gb) in intrinsically safe circuits by specialists with a
qualification similar to a qualified person in accordance with TRBS 1203.
b) The requirements for simple electrical equipment, which apply to the
potentially explosive area of zone 1 according to EN 60079-11, are met.
c) The products may only be used in a normal industrial atmosphere. If
aggressive substances are present in the air, the manufacturer should always
be consulted. The products must be appropriately protected in adverse
environmental conditions.
d) The operation of the product is only permitted in the completely assembled
and undamaged housing. In the event of possible damage, the operator may
have to consider the spread of zones. In addition, operation is not permitted if
the housing is damaged.
e) The environmental conditions specified in the operating instructions must be
strictly followed. Appropriate protection against adverse environmental
conditions needs to be realised.
f) The flow meter may only be operated when it is completely filled. Exceptions
according to the operator's risk assessment are only permitted for start-up
and shutdown.
g) Thermal radiation from third-party products / components must be taken into
account.
h) The flow meter must be protected against inadmissible ingress of liquids and
/ or contamination.
i) Stuck parts (e.g. due to frost or corrosion) must not be loosened with force in
the presence of an explosive atmosphere. Icing must therefore be avoided.
j) The flow meter may only be exposed to low vibrations, see also IEC 34-14.
k) A direct electrostatic discharge of high energy onto the equipment is not
permitted (usually cannot be generated by human contact). To ensure that
electrostatic charges are discharged, the national requirements must be
taken into account.
l) In particular, isolated established capacities must be prevented.
m) All construction parts must be connected to one another in metal, central
connection for equipotential bonding.
n) Equalizing currents must not be routed through the metallic structures.
o) The intrinsically safe connection must be made using approved / tested
evaluation devices that may have to be equipped with suitable Zener barriers
or switching amplifiers.
p) Only Zener barriers or switching amplifiers whose output circuits are
approved / tested for use in an explosive atmosphere may be used. In
Europe, use in Zone 1 requires an EC type-examination certificate for the
equipment in question, which is issued by a body designated for explosion
protection.
q) The voltage of the supply devices must be less than or equal to the voltage Ui
of the flow meter.
r) The total current Io of the supply devices must be less than or equal to the
current Ii of the flow meter.
Содержание DON-05
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Страница 9: ...DON H DON H 01 0721 page 9 Note The electronic option H0 is available with reed switch output...
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Страница 43: ...DON H DON H 01 0721 page 43 17 Statement of Conformity...
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Страница 48: ...DON H page 48 DON H 01 0721 18 State of safeness...