Liquid Controls SP3000 - Manual (Page 28)

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3.551 DIGITAL PULSE – SIXTEEN POINT PROGRAMMING
The 16 Point Linearization is used when the flowmeter gives a non-linear signal. The unit
uses up to 16 different frequency and K-Factor entries to form a curve for linearizing the
input signal.
SPONSLER, INC. STRONGLY RECOMMENDS THOROUGH REVIEW AND
UNDERSTANDING OF THIS SECTION PRIOR TO PROGRAMMING THE 16 POINT
MENU.
NOTES:
1 A minimum of three points must be set up.
2. If two consecutive input values or K-Factors are set to zero, extrapolation is taken from
the last two non-zero points to determine a K-Factor used for calculations.
3. If the input frequency is above the highest or below the lowest frequency programmed,
the unit will use the last two points to extrapolate the K-Factor and calculate the
resulting actual flow. Care must be taken that the K-Factor doesn’t extrapolate to zero.
If this happens, the unit will give erroneous readings. To avoid this occurrence,
program point 01 frequency at zero and point 01 K-Factor at the same K-Factor for the
lowest input frequency as listed in the flowmeter calibration sheet.
4. Frequencies must be entered in ascending order.
5. The 16 point option will not
override the cutoff Input Filter frequency entered elsewhere
in the Flow Variables menu.
6. Press the button when the desired number of points are entered. This will exit the
16 Point Setup routine and return to “Set Variables?” heading. If all 16 points are
programmed, the unit will automatically advance to the next required Setup item.
C