WIKA operating instructions models PGS10, PGS11 and PGS21
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4. Design and function / 5. Electrical switch contacts
4. Design and function
Description
Bourdon tube measuring elements are widely used in technical pressure
measurement due to their robustness and ease-of-use. Under the inuence
of pressure, these measuring elements deform within their elastic limits.
This motion is converted, via a mechanical movement (toothed gear), into
a rotational motion. To this, an electrical limit switch is connected - the
magnetic snap-action contact. The contact closes or opens the connected
electrical circuits when the settable limit values are exceeded.
Scope of delivery
Cross-check scope of delivery with delivery note.
5. Electrical switch contacts
Electrical connection
The electrical connection must only be made by qualied skilled
personnel
Connection of the switches via cable or via screw terminals in the
terminal box (L-connector)
The terminal assignment is stated on the product label of the pressure
gauge
The gauges must be connected to the equipotential bonding of the plant
Electromagnetic compatibility
EMC per EN 60947-5-2.
The instruments are to be protected against strong electromagnetic elds.
11581752.01 07/2010 GB/D/F/E
GB
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