Electromagnetic Compatibility - WIKA 632.51 Mode D'emploi

4. Alarm contacts
The permissible limits for U
depend on the sensor type. They can be taken from the corresponding EC-
type examination certificates. (The sensor type is stated on the connection
plate of the pressure gauge.)
GB
Suitable switch amplifiers are e.g.:
Circuit
(s. Ex-certific.)
Model 1
Model 2

Electromagnetic compatibility

EMC according to EN 60 947-5-.
The instruments are to be protected against strong electromagnetic fields.
To adjust red set pointers
The red set pointers for the alarm contacts are adjustable over the adjustment
lock in the window with the aid of adjustment key (included in delivery; to be
found on standard gauges on the outside edge of the junction box).
Red set
pointers
Adjustment
lock
8 WIKA Operating instructions pressure gauges Model 63.51 with 831 per ATEX
, I and P
i i
Sensor type Model designation
Fa. Pepperl & Fuchs
standard KFD-SR-Ex1
standard KFD-SR Ex
standard KFA6-SR-Ex1
standard KFA6-SR-Ex
SN-sensors KFD-SH-Ex1
SN-sensors KHA6-SH-Ex1
of the intrinsically safe supply circuits
i
EC-type exami-
nation certificate
PTB 00 ATEX 080
PTB 00 ATEX 080
PTB 00 ATEX 081
PTB 00 ATEX 081
PTB 00 ATEX 04
PTB 00 ATEX 043
Adjustment key
removable
WIKA-
Model
904.31
904.3
904.8
904.9
904.33
904.30
The red set point-
ers for the alarm
contacts are ad-
justable over
the full range
of the instrument.
Switching points
shall be set in the
ranges between
10 % and 90 %
of the scale, to
ensure switching
accuracy and long
life of the
mechanical
measuring
system.