Kistler-Morse Weigh II, Installation And Operation Manual

Page: 42 / 120

6-4
Chapter 6. Calibration
The greater the known quantity of material
added during the calibration procedure, the
greater the accuracy of the calibration.
Adding 50% of the total capacity results in
greater accuracy than adding 25% of the total
capacity.
Follow this procedure to calibrate by adding a
known quantity of material.
1. 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.
2. Use the Up Arrow and Down Arrow Keys to
scroll to the desired vessel.
3. Press the Menu Key to display the Main
Menu. The display shows:
4. Press the F3 Key to access the Cal Menu.
The display shows:
5. Press the F1 Key to access the Auto
Menu. The display shows:
6. Press the F1 Key to access LoSpan . The
display looks like this:
The unit of measure you set up in the
Units Menu shows in place of lbs.
7. Use the keypad or the Up and Down Arrow
Keys to input a value that represents the
estimated quantity of material in the vessel
as the
LoSpan value. Press the Enter Key
to save the value in memory. Lo Span is
now set [point (1) in Figure 6-3]. The
display flashes a message acknowledging
your selection and returns to:
8. Add a known quantity of material, repre-
senting at least 25% of the vessel’s total
capacity, to the vessel.
9. Press the F3 Key to access HiSpan . The
display looks like this:
The unit of measure you set up in the
Units Menu shows in place of lbs.
10. Using the keypad or the Up and
Down Arrow Keys, input the value equal to
the sum of the known quantity (Step 8) and
the estimated quantity (Step 7). Press the
Enter Key to save the value in memory.
Hi
Span is now set [point (2) in Figure 6-3].
The display flashes a message acknowl-
edging your entry and returns to:
11. Press the Esc Key to scroll up the
menu tree or press the Auto/Man Key to
return the display to vessel monitoring.
Note
Shifting the line from the dashed line to
the solid line in Figure 6-3 is accom-
plished by setting zero. The procedure
to set zero is described in
Refining the
Calibration by Setting Zero in this
section. Set zero when the vessel
contains a known quantity of material
(usually none) at a later date.
Calibration by Subtracting a
AUTO CAL MENU
LoSpan HiSpan
F1 F2 F3
HI SPAN AUTO CAL
> X lbs
F1 F2 F3
AUTO CAL MENU
LoSpan HiSpan
F1 F2 F3
WII MAIN MENU
Disp I/O Cal
F1 F2 F3
LO SPAN AUTO CAL
> X lbs
F1 F2 F3
AUTO CAL MENU
LoSpan HiSpan
F1 F2 F3
CALIBRATION MENU
Auto Manual
F1 F2 F3