KM SVS2000, Руководство по установке и эксплуатации, Страница: 39 / 89

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97-1129-01 Rev. D
hIgh-accuracy calIBraTIon
This procedure provides the highest accuracy, but requires that the vessel be completely empty to start. The
principle behind the calibration follows.
The vessel is completely emptied, and the Lo Span weight is set to zero [point (1) in Figure 7]. A known quantity
of material, representing at least 25% of the vessel’s total capacity, is then added to the vessel. That quantity is
entered as the Hi Span weight [point (2) in Figure 7]. The SvS2000 saves in memory the entered Lo Span and
Hi Span weights as well as the digital counts associated with each weight. These values define the straight line
shown in Figure 7. The slope of the line is called the Scale Factor, which is calculated internally.
Figure 7. High Accuracy Calibration
The accuracy of the calibration improves the greater the known quantity of material added during the calibration
procedure. For example, adding 50% of the vessel’s total capacity results in greater accuracy than adding 25%
of the total capacity. Follow this procedure to perform a high accuracy calibration:
1. Completely empty the vessel.
2. If the SVS2000 is in Run Mode, press the ‘2’ Key, ‘1’ Key, and Enter Key to access the menu tree. The
display shows:
21 AuTO CAL
3. Press the enter key to access this menu. The display shows:
LO SPAn CAL
4. Press the enter key to access the Lo Span Cal menu. The display looks like this:
> ------ lbs
(Units are consistent with Disp Units.)
5. Use the numeric or Arrow Keys to input zero. Press the Enter Key to save the value in memory. The
display acknowledges the entry and returns to:
LO SPAn CAL
6. Press the up Arrow key to proceed to the next menu. The display shows:
HI SPAn CAL
7. Add a known quantity of material, representing at least 25% of the vessel’s total capacity, to the vessel.