Design And Function - WIKA 831 Manual De Instrucciones

4. Design and function

4. Design and function
Description
The pressure gauges measure the pressure by means of resilient diaphragm

measuring elements
The measuring characteristics are in accordance with the EN 837-3 and

DIN 16 085 standards
In addition the Models 43X.30 and 43X.36 also meet the requirements,

relating to safety pattern pressure gauges, outlined in the EN 837 (user
protection) standard
The built-in electrical switch contacts are non-contact slot-type inductive
proximity sensors, which are powered from switching amplifiers with certified
intrinsically safe circuits. When any of the adjustable set points is reached, the
associated output circuits will either open or close.
As standard Model 831 slot sensors, to EC-type examination certificate

PTB 99 ATEX 19 X (see Appendix ) and ZELM 03 ATEX 018 X (see
Appendix 4), are used
Model 831-SN and -S1N SN sensors, to PTB 00 ATEX 049 X (see Appen-

dix 3) and ZELM 03 ATEX 018 X (see Appendix 4), are special designs with
safety features (that are not relevant to explosion protection) for special
applications
The connected loads for the switches are in accordance with EN 60 947-5-6
("NAMUR").
Scope of delivery
Cross-check scope of delivery with delivery note.
WIKA Operating instructions pressure gauges Model 4 with 831 per ATEX
GB
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