Samson 3725 Mounting And Operating Instructions page 69

P5 Characteristic
0 to 8
[0]
P6 Reference variable
[4 to 20 mA]
SRLO/SRHI
P7 w/x
[>>]/<>
P8* Gain K
P
30/[50]
P9 Pressure limitation
ON/[OFF]
P10 End position w <
[ON]/OFF
P11 End position w >
ON/[OFF]
P14 Info w
Not initialized
EB 8394 EN
Select characteristic:
0, 1, 2 for globe valves, 0 to 8 with rotary actuators (P3 = 90°)
0 Linear
1 Equal percentage
2 Reverse equal percentage
3 SAMSON butterfly valve, linear
4 SAMSON butterfly valve, equal percentage
5 VETEC rotary plug valve, linear
6 VETEC rotary plug valve, equal percentage
7 Segmented ball valve, linear
8 Segmented ball valve, equal percentage
For split-range operation:
SRLO: low range 4 to 11.9 mA
SRHI: high range 12.1 to 20 mA
Direction of action of the reference variable w to the travel/rota-
tional angle x (increasing/increasing or increasing/decreasing)
On initializing the positioner, the gain is set to the selected value.
If the positioner hunts, the K
The signal pressure can take on the same pressure as the supply air
at the maximum [OFF] or, in the case that the maximum actuator
force can damage the valve, the pressure is limited to approx.
2.3 bar.
Lower tight-closing function:
If w reaches up to 1 % towards the final value that causes the valve
to close, the actuator is immediately completely vented (with ATO -
air to open) or filled with air (with ATC - air to close).
Upper tight-closing function:
If w reaches up to 99 % towards the final value that causes the
valve to open, the actuator is immediately completely filled with air
(with ATO - air to open) or vented (with ATC - air to close).
Initialized Indicates the internally adjusted set point in the positioner (adjust-
ed set point in 0 to 100 % according to the settings in P6 and P7).
Touch
100 % according to the 4-20 mA signal).
Displays external set point in 0 to 100 % according to the
4-20 mA signal.
value can be reduced.
p
to display external set point (applied set point in 0 to
Annex
69