Hardy Process Solutions HI 6500 Series, User Manual

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Calibration
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Step 6. To set the Span Weight, place a certified test weight, equal to the span weight
entered in step 5, on the scale. This value is the amount of test weight that you will
apply, typically 80-100% of the expected maximum product loading on the load
cells.
Step 7. Use the DOWN button to select Do Cal Hi, then press the ENTER button to set
the Cal High point and complete the calibration sequence. A "Cal Completed OK"
message appears briefly if the calibration is successful. An Error number appears
if the calibration fails. See the Error list in the Troubleshooting chapter for help
with error correction
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.