WIKA SC15 - Handbuch (Seite 4)

GB
1. Safety instructions / ... / 3. Design, operating principle
1148
690 09/
009 GB/D
WIKA Operating Instructions Combistat Model SC 4
1. Safety instructions
The appropriate national safety regulations (e.g. VDE 0100)
must be observed when installing, commissioning and
operating these devices.
Serious injuries and/or damage can occur should the appropriate
regulations not be observed.
Only appropriately qualified personnel should carry out the connection
work.
Any connection work may only be carried out once the equipment has
been isolated.
2. Application
Universally applicable safety temperature regulator for gaseous, liquid and
highly-viscous process media.
3. Design and operating principle
The fluid-filled, closed measuring system consists of a temperature sensor, a
measuring capillary and a bourdon tube. Heating the temperature sensor leads
to a volume change in the closed system and thus a change in the pressure.
This is transferred through a measuring capillary to the bourdon tube and,
through the angular motion of the pointer shaft, to the dial on the display.
When the switch point is passed, the switch disc (cam disc), fitted to the
pointer shaft, triggers the micro switch.
Apart from the standard version with 1 or  adjustable micro switches there are
further combinations such as:
1 or  non-adjustable micro switches
1 non-adjustable and 1 variable adjustable micro switch
Case steel with  or 4 fixed switches
The switch points of the non-adjustable micro switches are printed on the
product label.
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