Smart Positioner
YT-3100
Product Manual
Ver. 1.19
49
9.9.8
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.
However, when the value is set to 100 %, Tight Shut Open function doesn’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
→
