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7. Starting, operation
Specifications
Pressure ranges
Over pressure safety
Burst pressure
Pressure ranges
Over pressure safety
Burst pressure
Materials
Wetted parts
Model PS-20
*)
Model PS-21
Case
Internal transmission fluid 3)
Power supply U
B
Type of switch
Number of switching points
Switching current (max. DC 30 V)
Mode of connection
Switch
Function
Adjustment of switching points % of span
■
Switching hysteresis
■
Switching window
■
Default values
■
WIKA Operating instructions / Betriebsanleitung / Mode d'emploi
Model PS-20 / PS-21
bar
0.25
0.4
bar
2
2
bar
2.4
2.4
bar
25
40
bar
50
80
bar
96
400
{Vacuum, gauge pressure, compound range, absolute pressure are available}
Only model PS-20.
1)
For model PS-21: The value specific in the table applies only when sealing is
2)
realised with the sealing ring underneath the hex. Otherwise max. 1500. bar applies.
Stainless steel
Stainless steel
O-Ring: NBR
Stainless steel
Synthetic oil
3) Not for model PS-20 with pressure ranges > 25 bar.
U
in VDC
10 (12) < U
B
A
1
4
PNP
NC or NO
0 ... 100
% of span
1 ... 99
% of span
0 ... 100
low / high
are set at latest 20 ms after the instrument has been switched on
This guarantees a clear definition of the switching state, when the instrument is
4)
switching on within the hysteresis pressure range.
0.6
1
1.6
2.5
4
5
10
10
4.8
6
12
12
60
100
160
250
120
200
320
500
550
800
1000 1200 1700
{Hastelloy}
{FPM/FKM or EPDM}
{Halocarbon oil for oxygen applications}
≤ 30 (using the programming module)
B
C
2
2
PNP/PNP
PS-20, PS-21
4
6
10
16
17
35
35
80
20.5
42
42
96
400
600
1000
800
1200
1500
2400
3000
2)
2)
GB
1)
4)
11
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