WIKA WU-10 Mode D'emploi page 8

7. Starting, operation
Mechanical Connection
Prepare the gas line connections appropriately.
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You should blow clean all fitting components (such as sealing gaskets, for example) using a clean/filtered gas. Please
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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
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Face Seal Connections (only WU-10, WU-15)
For connections compatible with VCR
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.
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.
Warning!
Make sure the transducer is not wired into any other device, prior to arc welding.
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Disconnect the transducer from any electrical device.
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Strictly avoid contact between leads from the connecting wire and metal surfaces.
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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).
8 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio WU-1X
-fittings:
®
GB