WIKA 632.51+8xx - Manual (Page 4)

WIKA Operating instructions pressure gauges Model 63.51 with 831 per ATEX 4
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Caution
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1. Safety instructions
The appropriate national safety regulations (i.e. VDE 0100/
EN 60 079-14/EN 837-) must be observed when installing,
putting into operation and running these instruments.
n Do not work on gauge while under voltage
n Serious injuries and/or damage can occur should the appropriate
regulations not be observed
n Only appropriately qualified persons should work on these
instruments
1. Safety instructions / 2. Description
2. Description
n The pressure gauges measure the pressure by means of resilient capsule
measuring elements
n The measuring features follow the example of the standards EN 837-3 and
DIN 16 085
The built-in electrical alarm contacts are non-contact slot-type inductive
proximity sensors, which are supplied from control units with circuits that are
certified to be intrinsically safe. When the adjustable set points are reached,
their output circuits will be opened or closed.
n As a standard slot sensors model 831 are used according to EC-type
examination certificate PTB 99 ATEX 19 X (see enclosure ) and
ZELM 03 ATEX 018 X (see enclosure 4)
n SN sensors models 831-SN and -S1N according to PTB 00 ATEX 049 X
(see enclosure 3) and ZELM 03 ATEX 018 X (see enclosure 4) are special
designs with safety features (that are not relevant to explosion protection)
for special applications
The connection values of the switches are in accordance with EN 60 947-5-6
(“NAMUR”).