WIKA 851.02.100 - Manual (Page 5)

5 WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch per ATEX
11242370 06/2007 GB/D/F
GB
3. Technical data and intended use / 4. Requirements for use ...
3. Technical data and intended use
Static pressure: 25 bar
Overpressure safety (either side): up to 25 bar max.
Operating temperature Ambient -10 … +70 °C
Medium +90 °C maximum
Observe restrictions for use in potentially explosive atmospheres
(see section 4)
Pressure connection: 2 × G ¼ female
IP Ingress protection: IP 54 (EN 60 529 / IEC 529)
Permissible vibration levels at the mounting point
T As a matter of principle the instruments should only be mounted in locations
without a vibration load.
T Isolation from a mounting point exposed to vibration can be achieved, for
example, by mounting the pressure gauge to a solid wall and a flexible
capillary connecting the measuring point to the pressure gauge (see
section 5).
T The following limits must not be exceeded:
Frequency range < 150 Hz
Acceleration < 0.7 g (7 m/s 2 )
Electrical contact
(applies to Model 702.02/03.100 and 851.02.100)
Adjustable range: from 10 % to 100 % of span
Switching point adjustment: from the outside by means of setpoint screw(s)
Contact hysterisis: max. 5 % of full-scale value
!
Note
4. Requirements for use in potentially explosive
atmospheres
The built-in Reed contacts (applies to Model 702.02/03.100 and
851.02.100) do not possess their own ignition source. For the
purposes of intrinsic safety they are 'simple apparatus' as defined
in EN 50 020.
When supplied from a tested and certified intrinsically safe circuit
(associated apparatus), these switches may be used in potentially
explosive atmospheres up to category 2 without having to take any
further measures.