WIKA 73 - Manual (Page 8)

GB
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 filled 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
deflection is transferred to the pointer via a dial movement.
Fluctuations in ambient temperature affecting the casing can be
neglected, as a bimetal compensation element is fitted 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).