Smart Positioner
YT-3700 / 3750
Product Manual
Ver. 1.03
65
8.9.10 Target Position Ramp Up Rate (RAMP UP) and Target Position Ramp Down Rate (RAMP dN)
It is used to prevent the valve from moving too fast when the process to be controlled is too sensitive
to rapid changes in flow or pressure. The unit of setting is %/sec. If you want to move 100% of the
stroke for about 5 seconds, set it to 20 [%/sec]. The rising and falling speed can be set independently,
and the valve will move to the target position as soon as possible when this function is switched off.
The curves below show the target position (red) and the actual position (blue) of the valve after
applying SP Ramp Up/Down rate.
