Yokogawa YVP20S - Manual (Page 106)

10-8
<Toc> <Ind> <10. CALIBRATION SERVICES>
IM 21B04C50-01E
10.3 Travel Calibration
The Travel Calibration tab allows the user to adjust calibration at 0%, and 100% to match
the valve’s working stroke when there is over-travel at one or both stops. Additionally, if the
valve linkage introduces a non-linearity, it can be corrected by setting a correction at 50%.
The corrections in this dialog are applied over corrections applied with Open Stops tool and
over the Custom Linearization tools. It is recommended that only one set of correction tools
be used for adjusting zero, span, and non-linearity calibrations.
IMPORTANT
Before performing Travel Calibration, check that the Tight shut Off and Full Open Features,
and the Position Limits are disabled.
IMPORTANT
If travel calibration is used to change zero and span more than 10% then the Position Limits
defaults may be incorrect.
Step 1 Perform Auto or Manual stops procedures to clear previous calibration adjust-
ments. (See Page 10-1)
Figure 10.9 Increment the closed position (0% Calibration)