WIKA 630.20 - Manual (Page 7)

7 WIKA Operating instructions pressure gauges Model 6 with 831 per ATEX
2030660 12/2004 GB/D/F
GB
Permissible vibratory stress at the mounting location
T As a matter of principle the instruments should only be mounted at locations
without vibratory stresses
T Where required, a decoupling from the mounting location can be achieved
e.g. by a flexible connecting line from the measuring point to the pressure
gauge and mounting via a measuring instrument bracket.
4. Alarm contacts
EC-type examination certificates
T Standard version Model 831.XX
PTB 99 ATEX 2219 X (enclosure 2) and ZELM 03 ATEX 0128 X (enclosure 4)
Depending on the number of switches and on the case diameter either
Model SJ2-N... or Model SJ3.5-...-N... is used.
T Safety pattern version Models 831.XX - SN or - S1N
PTB 00 ATEX 2049 X (enclosure 3) and ZELM 03 ATEX 0128 X (enclosure 4)
Depending on the number of switches and on the case diameter either
Models SJ 2-SN..., SJ 2-S1N..., SJ 3.5-SN.. or SJ 3.5-S1N... are used.
The built-in sensor type is stated on the product label of the pressure gauge.
Wiring details
T The electrical connections should be made by qualified electricians
T Connection of the switches via screw terminals in the terminal box
T Conductor cross section max. 1.5 mm 2
T The terminal assignment is stated on the connection plate at the
pressure gauge
3. Technical data ... / 4. Alarm contacts
Installation
T Nominal position per EN 837-1 / 9.6.7 Figure 9: 90° ( )
T Pressure connection: lower mount (LM) or lower back mount (LBM)
T In order to avoid any additional heating, the instruments must not be
exposed to direct solar irradiation while in operation!
T With filled versions the ventilating valve at the top of the case must be
opened prior to commissioning!