Wika 73 Bedienungsanleitung PDF herunterladen (Seite 8)

12099431.05 10/2010 GB/D/F/E

8 WIKA operating instructions models 73, 74, 75

4. Design, function / 5. Transport, packaging ...

4. Design and function

4.1 Description

The gas actuated thermometer consists of a stem, capillary and

Bourdon tube in the casing. These parts are combined to form a

single unit. The entire measuring system is lled with an inert gas

under pressure.

A change in temperature will cause a change in internal pressure

in the sheath. The pressure deforms the measuring spring and the

deection is transferred to the pointer via a dial movement.

Fluctuations in ambient temperature aecting the casing can be

neglected, as a bimetal compensation element is tted between the

dial movement and the measuring spring.

Scale ranges with accuracy class 1 per DIN EN 13190

between -200 ... +700 °C

4.2 Scope of delivery

Cross-check the scope of delivery with the delivery note.

5. Transport, packaging and storage

5.1 Transport

Check instrument for any damage that may have been caused during

transportation.

Obvious damage must be reported immediately.

5.2 Packaging

Do not remove packaging until just before mounting.

Keep the packaging as it will provide optimum protection during

transport (e.g. change in installation site, sending for repair).

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Wika 73 Bedienungsanleitung Seite 8