WIKA WU-20 Mode D'emploi page 10

7. Starting, operation
Remove the protection cap only just before installation.
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When mounting the instrument, ensure that the sealing faces of the instrument and the
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measuring point are clean and undamaged.
EN Do not scratch or nick the bead. Do not over tighten. Damage to the bead will affect the
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fitting's performance and may cause leakage in the system.
Screw in or unscrew the instrument only via the flats using a suitable tool and the
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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 transducer in, ensure that the threads are not jammed.
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WARNING!
For transducer with Ex-/FM-marking:
Protect the inner diaphragm against any contact with abrasive substances and pressure
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peaks and do not touch it with tools. Damage of the diaphragm may result in losing the
explosion protection.
Observe the technical data for the use of the transducer in connection with aggressive /
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corrosive media and for the avoidance of mechanical hazards.
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/
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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-
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quality fittings.
Face Seal Connections (only WU-20, WU-25)
For connections compatible with VCR
1. Hold the swivel female face seal / swivel male face seal, mounting part (valve etc.) or case hexagon. Tight-
en the swivel female face seal hand-tight and adjust the instrument to the desired position. When tighten-
ing or untightening at mounting parts (valves etc.) or fittings, ensure that the threads do not get jammed.
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-fittings:
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WIKA operating instructions, model WU-2x