Smart Positioner
YT-3700 / 3750
Product Manual
Ver. 1.03
63
8.9.8
Tight Shut Open (TSHUT OP)
It is used to ensure that the valve is fully opened with a large force. When the input signal SP is
greater than the value set in the TSHUT OP, all available force is applied to OUT 1 port to tightly
open the valve. If the input current of 4 mA is 0% of valve position and 20 mA is 100% of valve
position, and the Tight Shut Open value is set to any position less than 100% (e.g. 95%), then the
valve stroke will be 100% immediately when the input signal is over the set value (e.g. 95%). A full
supply pressure applied to the actuator via the OUT1 port prevents leakage of the valve by shutting
the valve tightly. But, when the value is 100%, Tight
Shut Open function don’t work.
3 seconds
Press <UP> or
<DOWN> button
if the above is not
displayed.
Press <UP> or
<DOWN> button
if the above is not
displayed.
<UP>/<DOWN>
<ESC>
3 times
