HYDAC ELECTRONIC HDA 4000 Series, Руководство по эксплуатации

Страница: 36 / 60

HDA 4000 with IECEx-Approval
Page 6 of 30
Status: 2014-09-03
HYDAC ELECTRONIC GMBH Mat.
No.: 669746
5. Safety Information
The pressure transmitter may no longer be used when the label becomes illegible.
Intrinsic safety barriers with protection type „ia“ are to be used for connecting to the pressure
transmitters.
The seals and gaskets are to be checked to see that they function properly prior to mounting and
at regular intervals in keeping with the climatic conditions and the influence of the media, and to be
changed as needed. Replacement seals and gaskets can be obtained from HYDAC
ELECTRONIC GMBH. (Standard seal see technical data) This check is to be conducted at least
every three years.
HDA 41xx / 43xx with ceramic measurement cell:
When used simultaneously in zones 0 and 1, the ceramic measurement membrane of the pressure
transmitters functions as an “isolating wall” between zone 0 and 1. The thickness of this “isolating
wall” is generally
≤ 1 mm, and ≤ 0.2 mm for rated pressures below 1 bar. This isolating function is
to be ensured in any event by checking the compatibility of the media being measured and the
materials used to make the pressure transmitter; the overload and bursting pressures are also to
be adhered to (for details, see Technical Specifications).
HDA 44xx / 47xx with stainless steel membrane:
When used simultaneously in zones 0 and 1, the metal measurement membrane of the pressure
transmitters functions as an “isolating wall” between zone 0 and 1. The thickness of this “isolating
wall” is generally
≤ 1 mm, and ≤ 0.2 mm for rated pressures below 100 bars. This isolating function
is to be ensured in any event by checking the compatibility of the media being measured and the
materials used to make the pressure transmitter; the overload and bursting pressures are also to
be adhered to (for details, see Technical Specifications).It is imperative that the measurement fluid
is compatible with the materials used in the pressure transmitter; similarly, the overload pressures
and bursting pressures must be adhered to without fail (for these specifications, see the “Technical
Specifications” and “Safety Information” of the EC type examination certificate).
The internal measurement membrane of the pressure transmitter is to be protected against
mechanical damage. This applies especially for transmitters with flush membrane if the unit is
used simultaneously in zones 0 and 1 equally zones 1 and 2.
It is imperative that the measurement fluid is compatible with the materials used in the pressure
transmitter; similarly, the overload pressures and bursting pressures must be adhered to without
fail (for these specifications, see the “Technical Specifications” and “Safety Information” of the EC
type examination certificate).
The internal measurement membrane of the pressure transmitter is to be protected against
mechanical damage. This applies especially for transmitters with flush membrane if the unit is
used simultaneously in zones 0 and 1 equally zones 1 and 2
The transfer media between the flush membrane and the internal measurement membrane is
paraffin oil (white oil, S933).
Please ensure sufficient sealing between the zones as well.
The data pe
rtaining
to use in Hazardous Location is to be heeded in any event.
Operation is only permitted when operational and process related intensive electrostatic changes
are eliminated.
When used in atmospheres containing combustible dusts, the pressure transmitter must be
installed in such a way that it is protected from damage and knocks.
From a safety point of view, the supply / output circuit of pressure transmitter shall be considered
to be connected to earth.
By adherence to safety guidelines in the protection rating and applications:
Ex nA IIC T6 Gc / Ex ta IIIC T80°C T
500
T90°C Da und Ex tb III C T80°C Db
the usage of the impact protected metal safety sleeve (for M12x1 connector) is stringently required.
The impact protected metal safety sleeve must be tightened with a torque of 20 Nm.
Operations in areas requiring category 1G equipment, are only permitted when operational and
process related intensive electrostatic charges are eliminated.