Pneumatic Positioner
YT-1200 series
Product Manual
Ver. 1.18
41
6.4
Adjustment – A/M switch (Auto/Manual)
1)
Auto manual switch is on the top of pilot unit. Auto manual switch allows the positioner to be
functioned as by-pass. If the counter-clockwise (toward “M”, Manual), it is loosened, then the
supply pressure will be directly supplied from out1 port of positioner to the actuator regardless of
input signal pressure. On the other hand, if the switch is turned clockwise (toward “A”, Auto) and it
is fasten tightly, then the positioner will operate normally by input signal ampere. It is extremely
important to check the allowed pressure level of the actuator when the switch is loosened.
2)
Check whether the supply pressure is too high.
3)
After using “Manual” function, auto manual switch should be returned to “Auto”.
Fig. 6-10: A/M switch adjustment
