Kistler-Morse KM Weigh II - Manual (Page 114)

Appendix G. Calculation of Maunal Calibration Parameters
G-4
Refining the
Calibration
While moving material into the vessel, you
kept an accurate record of the actual material
weight and the indicated material weight (from
the Weigh II). Now you want to use this
information to refine the calibration.
Refer to Figure G-1. The calculation of the
parameters for refining the calibration follows:
1. Define the material weights you recorded
as Indicated High Load, Indicated Low
Load, Actual High Load, and Actual Low
Load (Actual Low Load is 0, because you
started with an empty vessel).
2. If the Weigh II is in Auto Mode (Auto LED
illuminated), press the Auto/Man Key to
put the system in Manual Mode. The Auto
LED turns off.
3. Use the Up Arrow and Down Arrow Keys to
scroll to the desired vessel.
4. Press the Menu Key to display the Main
Menu. The display shows:
5. Press the F3 Key to access the Cal Menu.
The display shows:
6. Press the F3 Key to access the Manual
Menu. The display shows:
7. Press the Menu Key to access the second
page of the Manual Menu. The display
shows:
8. Press the F3 Key to access Display. The
display looks like this:
9. Press any key other than the Esc or Auto/
Man Key to cycle through the display
parameters. Write down the current
ZERO_WGT, ZERO_CNT, SCF_WGT,
and SCF_CNT values.
Figure G-1. Calculating Manual Calibration Parameters to Refine Calibration
Weight
Signal
in Counts
Weight
Indicated
Low Load
Indicated
High Load
Low Counts
= New ZERO_CNT
New Calibration Line,
New Slope
Actual
Low Load
(0)
Actual
High Load
High
Counts ZERO_CNT
Old Calibration Line
Scale Factor Wt = Hi Span Wt - Lo Span Wt
Scale Factor Cnts = Hi Span Cnts - Lo Span Cnts
Slope =
Scale Factor Weight
Scale Factor Counts
CALIBRATION MENU
Auto Manual
F1 F2 F3
MANUAL CAL MENU
ScfCnt ScfWgt
F1 F2 F3
Cnts/mV: X
0mV cnts Y
F1 F2 F3
MANUAL CAL MENU
Zero_Cnt Disply
F1 F2 F3
WII MAIN MENU
Disp I/O Cal
F1 F2 F3