Chapter 3 – Initial Setup
Hardy Process Solutions HI 6200 Weigh Processor User Guide
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Multi-Point Calibration
Multi‐Point Calibration, (also called midpoint correction) is simply a calibration with 3‐5 points.
Standard two‐point calibration assumes linearity (a straight line). However, calibration to just 2 end
points may not accommodate for non‐linearity (a curved line) that may happen in the middle of the
load curve.
Multi‐Point calibration lets users calibrate at three, four or five values on the curve. A multi‐point
calibration means, in comparison to a two‐point calibration, that you can calibrate non‐linearity
significantly more accurately
To achieve the best possible accuracy, the multi‐point calibration should cover the entire range of
the desired measurement values (from zero to the highest possible value).
To access Multi‐Point Calibration from the web browser, click on the Multi‐Point Calibration link at
the bottom of the Calibration page.
a. First, select the number of Cal Points necessary to accommodate for non-linearity
that can’t be mechanically corrected in the system. Users that have previously
performed a Calibration or set the span weight value using traditional calibration, will
see that value populated as the highest number of Cal Points selected (for example,
point 3-5 depending on your instrument.).
b. Perform each calibration step by step from Cal Point 1 to the next point Weight (e.g.
Cal Point 2 then Cal Point 3) until you reach your last selected point
c. The system will be calibrated with multiple points, providing the most accurate
method for a non-linear calibration.
Note:
Multi-Point Calibration is only available through the Webserver, not the panel display.
