Smart Positioner
YT-3700 / 3750
Product Manual
Ver. 1.03
64
8.9.9
Tight Shut Close (TSHUT CL)
It is used to ensure that the valve is fully closed with a large force. When the input signal SP is
smaller than the value set in the TSHUT CL, air pressure is vented through OUT 1 port to tightly
close 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 Close value is set to any position larger than 0 % (e.g. 5%), then the
valve stroke will be 0 % immediately when the input signal goes below the set value (e.g. 5%). The
air venting from the actuator via the OUT1 port prevents leakage of the valve by shutting the valve
tightly.
But, when the value is 0%, 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
