WIKA WU-16 - Manual (Page 5)

2460160.06 GB/D/F/E 01/2010
8 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio WU-1X
2460160.06 GB/D/F/E 01/2010
9 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio WU-1X
7. Starting, operation GB
Welding Connections (only WU-10, WU-15)
The weld needs to be fully penetrating, but amperage and heat need to be minimised. We
recommend flowing Argon gas through the transducer during welding. This will help to cool
the transducer. Prior to welding tubing to the transducer, it is recommended that a few test
welds be made.
„ Make sure the transducer is not wired into any other device, prior to arc
welding.
„ Disconnect the transducer from any electrical device.
„ Vermeiden Sie es strikt, dass Zuleitungen aus der Anschlusslitze mit
Metalloberflächen in Berührung kommen.
Post-processing
1. Adjust the zero point (please refer to chapter Zero Adjustment).
2. Verify integrity of the weld or seal by appropriate helium leak-testing procedures.
3. Turn the gas flow ON then OFF, 10 times to remove any particles generated during
installation. (The flow rate used should at least equal the process flow specifications.)
MSM, Modular Surface Mount (only WU-16)
Please observe the corresponding technical specifications, such as torques and mounting
position of the contact components.
Electrical connection
7. Starting, operation GB
„ Connect the instrument to earth via the pressure connection.
„ 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 30m (2-wire) or 3m (3- or 4-wire), or if
it is run outside of the building.
„ Use power supplies which guarantee reliable electrical isolation of the operating
voltage as per IEC/DIN EN 60204-1. Consider also the general requirements for PELV
circuits in accordance with IEC/DIN EN 60204-1.
„ Ingress protection per IEC 60529 (The ingress protection classes specified only apply
while the pressure transmitter is connected with female connectors that provide the
corresponding 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.
„ The transducer must be connected and operated in accordance with the approriate
regulations. Take care to ensure that the electrical connection (e.g. M12 connector) is
correctly made (fully sealed).
Mechanical Connection
„ Prepare the gas line connections appropriately.
„ You should blow clean all fitting components (such as sealing gaskets, for example) using
a clean/filtered gas. Please refer to the specific technical guides furnished by the gasket
manufacturers for additional specifications.
„ You can then remove the protective film, as well as any plastic caps there may be for
protecting high-quality fittings
Face Seal Connections (only WU-10, WU-15)
For connections compatible with VCR
® -fittings:
1. Hold the swivel female face seal / swivel male face seal, mounting part (valve etc.) or case
hexagon. Tighten the swivel female face seal hand-tight and adjust the instrument to the
desired position. When tightening or untightening at mounting parts (valves etc.) or fittings,
ensure that the threads do not get jammed.
2. Hold the swivel female face seal with a suitable open-end wrench. Tighten the swivel
female face seal / swivel male face seal or mounting part (valve etc.) by a 1/8 or 1/4 turn
(depending on the sealing elements used) beyond the hand-tight position.
3. Please refer to the specific technical guides furnished by the fitting manufacturers for
additional specifications.
4. With that the transducer is mechanically connected. Electrical connection possibilities are
described in the following section.
The WIKA WU Series transducer is designed to operate with an input voltage of
10 VDC < U B ≤ 30 V (14 ... 30 V with output signal 0.1 ... 10.1 V and 0 ... 10 V).
The interrelationship between voltage supply and load resistor (R A ) is illustrated by the
following diagram.
!
Warning