Tecsis PEX10 Mode D'emploi page 32

7. Starting, operation
Electrical connection
Earth the housing, through the process connection, against electromagnetic
!
fields and electrostatic discharge.
Warning
Ground the cable screen at one end, preferably in the safe, thus non-Ex, area
„
(EN 60079-14). For devices with flying leads, the screen is connected to the
housing. The simultaneous connection of housing and cable screen to ground
Warning
is only permitted if ground loop problems between the screen connection
(e.g. at the power supply) and housing can be excluded (see EN 60079-14).
Supply the pressure sensor from an intrinsically safe current circuit (Ex ia).
„
Consider both the internal capacitance and inductance.
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Cover flying leads with fine wires by an end splice (cable preparation).
„
The bayonet-connector is made of light metal, a material which is not permissible for group
„
I applications (mining).
Consider that cables for use in zones 1 and 2 must be checked with a test voltage between
„
conductor/earth, conductor/screen, screen/earth of more than 500V (AC).
Operate the pressure sensor with a shielded cable and earth the shield at least on one
„
side of the cable, if the cable is longer than 30m (2-wire) or 3m (3- or 4-wire), or if it is
run outside of the building.
Ingress protection per IEC 60529 (The ingress protection classes specified only apply
„
while the pressure sensor is connected with female connectors that provide the corre-
sponding ingress protection).
Ensure that the cable diameter you select fits to the cable gland of the connector
„
Ensure that the cable gland of the mounted connector is positioned correctly and that
the sealings are available and undamaged. Tighten the threaded connection and check
the correct position of the sealings in order to ensure the ingress protection.
Please make sure that the ends of cables with flying leads do not allow any ingress of
„
moisture.
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