Jordan Valve Mark 16IQ Series – Smart Valve - Manual (Page 5)

Richards Industries
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a. This is the same as #10. This is used to slow down the downward stroke.
12. SFCT – Characteristic
a. Lin – The linear default yields a rough linear response to a change in
signal. In general, this setting will keep the trim slightly above an ideal
position. This works fine for general applications, but in critical
applications, it is better to use the freely settable characteristic based on
linear.
b. EP – This yields an equal percentage characteristic when set. Rarely used
and has three options.
c. N-EP – This yields an inverse equal percentage, or results in a quick
opening type of response. Never used and also has three options.
d. Free – This setting yields the most accurate response from the positioner.
Set it for a true linear (default values) to get the best linear response, or
slightly modify the first 4-5 points to get enhanced low flow performance.
13. through 33 – Freely Settable Points
a. These points are used to give a unique characteristic to the positioner.
Each point is programmed at 5% signal increments. You enter in the % of
stroke associated with each point. Default settings are true linear.
34. DEBA – Deadband
a. This setting is used to help keep the positioner very accurate. Default is
Automatic. In automatic the deadband actually varies as the valve
operates.
b. Using the numerical input values, the best value for this feature is 0.2. At
0.1 the positioner can be slightly unstable. This value should not be used.
Running with a fixed deadband results in better and more predictable
performance.
35. YA – Stroke Limit
a. This setting is used to bypass a portion of the stroke. On a sliding gate
valve with overlap, this can be used to ‘zero out’ the overlap. The YA
setting is manipulated on direct acting sliding gate valve to skip over the
closing band. This is entered as a percentage of stroke.
36. YE – Stroke Limit
a. This setting is used for reverse acting sliding gate valves. You would
enter in the % of stroke taken up by the overlap to fine tune the controlled
span.
37. YNRM – Position Display
a. MPOS – This value will deliver a 0-100% reading based on the hard stops
in the valve. This value is used for all globe style control valves.
b. FLOW – This value is used for sliding gate valves. It linearizes the
position display to read 0-100% from the beginning of the YA setting to
the end of the YE setting. In other words, it only shows a positive valve
position when flow is capable of running through the valve.
38. YDIR – Display Direction
a. This value changes the way the display reads. If the signal is 4-20 mA,
and the valve runs from closed to open, you would want the display to
read the same. If after initialization the positioner reads backwards, this
setting will correct that issue. This only changes the way the display
functions. It does not have any influence over how the positioner reacts.