Ytc YT-1200L, User Manual, Page: 18 / 21

Adjustment – Zero Point
①
Set supply signal at 3 psi and rotate adjuster clockwise or counter-clockwise to adjust
actuator's rotation angle. <Figure 19>
②
When adjusting zero for single actuator, rotation angle is equal to positioner's pressure
gauge.
Adjustment – Span
①
After setting zero, rotate Span screw so supply signal reaches at the span point on
the indicator.
②
Changing span point affects zero point setting. So zero setting must be set again.
After setting zero point, confirm the span point. This step must be repeated until
both points are properly set.
③
If 1/2 split range is used, YT-1200L can be used after span and zero point are set.
For YT-1200R with 1/2 split range, the span spring must be changed.
④
After setting is completed, tighten Lock Screw. <Figure 20>