Kistler-Morse KM SVS2000 - Manual (Page 45)

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97-1129-01 Rev. D
9. Press the enter key to access the Zero Counts menu. The display looks like this:
> 1048576 cnts
10. Use the numeric or Arrow Keys to input a value for the zero counts. Press the Enter Key to save the
value in memory. The display acknowledges the entry and returns to:
ZERO COUnTS
11. Press the Gross or net Key to return to Run Mode.
23 lInearIzaTIon
The linearization function is used to correct nonlinearities from a vessel’s sensor/transducer output. Linearization
may be required if you notice one of the following after the system is correctly calibrated (using Auto Cal):
• The SvS2000 gives accurate results when the live load is close to 0 and close to the full scale (maximum
live load) value, but is consistently inaccurate between those values.
• The SvS2000 gives accurate results over some of the live load range, but is consistently inaccurate in
one area.
The word ‘consistent’ refers not only to an error occurring, but that the error is approximately the same each
time. This type of error may be caused by a non-linear response of the vessel’s structure to changes in load. This
type of error can also result from layering of multiple types of material in the vessel, with differing densities, in
distinct, consistently defined layers.
note: Changing the linearization table incorrectly can cause the SvS2000 to display incorrect sensor data. Do
not change the linearization table unless one of the above problems has been noted. The SVS2000’s linearization
algorithm uses a five-point piece-wise linearization method with linear interpolation between points. Figure
10 illustrates the linearization operation. The linearization table consists of five raw weights as inputs and five
corrected weights as outputs. The default for Linearization is Off. Additionally, the raw and corrected default
values are identical, so the default linearization table has no effect on the SVS2000, even if linearization is On.
Following is an example of a situation where use of the linearization table may be required:
example: When the vessel is empty, the SvS2000 correctly shows approximately 0 lbs. you start putting
truckloads of material into the vessel, and notice the following pattern:
Truck Total Indicated Load Total Actual Load
0 0
1 6,000 5,000
2 11,500 10,000
3 16,000 15,000
4 20,000 20,000
After the fourth truckload, the indicated load from the SVS2000 is reasonably accurate. you notice this same
pattern and magnitude of errors every time you start with an empty vessel. To correct for the non-linear
response, you input the following values in the Linearization Set menu: