WIKA E-11 - Handbuch (Seite 5)

11116552.07 GB/D 06/2010
8 WIKA Operating instructions/Betriebsanleitung E-10, E-11
11116552.07 GB/D 06/2010
9 WIKA Operating instructions/Betriebsanleitung E-10, E-11
7. Starting, operation GB
„ When mounting the instrument, ensure that the sealing faces of the instrument and
the measuring point are clean and undamaged.
„ Screw in or unscrew the instrument only via the flats using a suitable tool and the
prescribed torque. The appropriate torque depends on the dimension of the pressure
connection and on the sealing element used (form/material). Do not use the case as
working surface for screwing in or unscrewing the instrument.
„ When screwing the transmitter in, ensure that the threads are not jammed.
„ Do not torque the process controller with a force greater than 36,9 foot pounds
(50 Nm).
„ For tapped holes and welding sockets please see Technical Information IN 00.14 for
download at www.wika.de
7. Starting, operation GB
„ Protect the diaphragm against any contact with abrasive substances and
pressure peaks and do not touch it with tools. If you damage the diaphragm,
no intrinsic safety can be guaranteed (ATEX)!
„ Do not use the pressure transmitter out of the temperature range from
-40 ... +105 °C / -40 ... +221 °F. Out of this range there is no explosion
protection ensured.
„ Observe the permissible surface temperature applicable for this range according to the
defined temperature classes.
Electrical connection
„ Connect the instrument to a power supply that is equipped with a protective
measure to IEC 60364-4-41 (DN VDE 0100-410).
„ Attempting to remove the cable connection will damage the transmitter and
void the factory warranty and approval.
„ The electrical connection to the transmitter should be used as originally
supplied. It must not be bypassed or modified (with the exception of the
cable length). Improper assembly or alteration of the electrical connection
will invalidate the explosion protection class for which the transmitter is
certified.
„ Cover flying leads with fine wires by an end splice (cable preparation).
„ Installing with conduit use only threads NPT 1/2" according ANSI/ASME B1.20.1.
Screw them together with a minimum of 5 turns.
„ Clamp the free cable tail to a suitable certified clamp box or outside the hazardous area.
„ Operate the pressure transmitter with a shielded cable and earth the shield at least
on one side of the cable, if the cable is longer than 30 m, or if it is run outside of the
building.
„ Ingress protection per IEC 60529.
„ Please make sure that the ends of cables with flying leads do not allow any ingress of
moisture.
Load (e.g. display) Power supply
UB+/Sig+ Positive supply / measurement connection
OV/Sig- Negative supply / measurement connection
Earth the housing through the process connection to protect the transmitter
from electromagnetic fields and electrostatic discharge.
„ Ground the cable screen at one end, preferably in the safe, thus non-
Ex, area (EN 60079-14). For transmitters with flying leads, the screen is
connected to the case. The simultaneous connection of case and cable
screen to ground is only permitted if ground loop problems between the
screen connection (e.g. at the power supply) and case can be excluded (see
EN 60079-14).
Warning
Warning
!
Warning
Warning