WIKA 630.20 - Manual (Page 8)

8 WIKA Operating instructions pressure gauges Model 6 with 831 per ATEX
2030660 12/2004 GB/D/F
GB
The permissible limits for U
i
, I
i
and P
i
of the intrinsically safe supply circuits
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.)
Suitable switch amplifiers are e.g.:
4. Alarm contacts
Circuit Sensor type Model designation EC-type exami- WIKA-
(s. Ex-certific.) Fa. Pepperl & Fuchs nation certificate Model
Model 1 standard KFD2-SR2-Ex1 PTB 00 ATEX 2080 904.31
standard KFD2-SR2 Ex2 PTB 00 ATEX 2080 904.32
Model 2 standard KFA6-SR2-Ex1 PTB 00 ATEX 2081 904.28
standard KFA6-SR2-Ex2 PTB 00 ATEX 2081 904.29
SN-sensors KFD2-SH-Ex1 PTB 00 ATEX 2042 904.33
SN-sensors KHA6-SH-Ex1 PTB 00 ATEX 2043 904.30
The desired value indicators for the alarm contacts are adjustable over the full
range of the instrument. Switching points shall be set in the ranges between
10 % und 90 % of the scale, to ensure switching accuracy and long life of the
mechanical measuring system.
Adjustment key
removable
Desired value
indicators
(red set pointer)
Adjustment lock
Electromagnetic compatibility
EMC according to EN 60 947-5-2.
The instruments are to be protected against strong electromagnetic fields.
To set desired value indicator
The desired value indicators for the alarm contacts are adjustable over the
adjustment lock in the window with the aid of adjustment key (included in deli-
very; to be found on standard gauges on the outside edge of the junction box).