54
EB 8390 EN
Operation
t [s]
Target range
x [%
]
Sta
rt
100
P14 + ½ P1
5
⇒
95
P8 = 98
>
2.1 mA
<
1.2 mA
>
2.1 mA
<
1.2 mA
>
2.1 mA
<
1.2 mA
>
2.1 mA
<
1.2 mA
Contact
A
Contact
B
Contact
C
Contact St
End
Star
t
End
P14 – ½ P15
85
P15 = 90
PST
2
successful
PST 1
not successful
*
*
* The contact C remains activated three seconds after the valve moves out again of the PST target
range.
Fig. 17:
Example: Course of first two partial stroke tests
The graph shows the states when A, B and C contact setting = NC (P6)
Summary of Contents for 3738-20
Page 69: ...EB 8390 EN 69 Dimensions in mm 14 Dimensions in mm 231 20 17 97 130 185 84 42 10 30 40...
Page 71: ...EB 8390 EN 71...
Page 72: ...72 EB 8390 EN...
Page 73: ...EB 8390 EN 73...
Page 74: ...74 EB 8390 EN...
Page 75: ...EB 8390 EN 75...
Page 76: ...76 EB 8390 EN...
Page 77: ...EB 8390 EN 77...
Page 80: ...80 EB 8390 EN...
Page 81: ...Key number 42...
