STX Signal Transmitter Installation and Operation ... - Kistler-Morse

Chapter 7. MVS-STX Calibration Menu
• A_SCF_C (analog scale factor counts,
calculated internally based on STX PCB’s
analog calibration; only applicable when
STX PCB is in Analog Mode)
• A_ZERO_C (analog zero counts, calculated
internally based on STX PCB’s
analog calibration; only applicable when
STX PCB is in Analog Mode)
Follow this procedure to display the auto
calibration parameters:
1. While in the Auto Cal Menu, access the
second page by pressing the Menu Key
until the display shows:
AUTO CAL MENU
Zero_Cal
Disply
F1 F2 F3
2. Press the F3 Key to access Disply.
The display looks like this:
Cnts/mV: 699.05
0mV cnts 1048576
F1 F2 F3
3. Press any key other than the Esc
or Auto/Man Key to cycle through
the parameters.
4. Press the Esc Key to scroll up the menu
tree or press the Auto/Man Key to return
to channel monitoring.
Resetting Auto
Calibration Parameters
The third page of the Auto Cal Menu has a
reset function. Use this menu to reset the
calibration to the default, listed below:
• Cnts/mV — dependent on Gain value
(see Chapter 8, MVS-STX Service Menu).
Value is 699.05 for the default Gain of 2.
• 0mV cnts — 1,048,576
• H_SPAN_W — 9,999*
• L_SPAN_W — 0
• H_SPAN_C — 1,298,576
• L_SPAN_C — 1,048,576
• ZERO_WGT — 0
• ZERO_CNT — 1,048,576
• SCF_WGT — 9,999*
• SCF_CNT — 250,000
*Decimal point/dummy zeroes are consistent
with Form.
Manual
For manual calibration, you calculate and
input directly the slope and setting zero point
of the calibration line. There are three reasons
for performing manual calibration instead of
automatic calibration:
• You cannot move any material now, and
want to get started using your system
with a pre-calibration.
• You calibrated the system. Later, you
moved material into an empty vessel and
kept an accurate record of actual material
weight (based on a truck weight or some
other accurate information) and indicated
material weight (from the MVS). However,
you did not perform an Auto Cal at the
time. You want to use this information
now to refine the calibration.
• You want to re-enter data from a
previous calibration.
Calculation of manual calibration parameters
for pre-calibration and calibration refining is
covered in Appendix C, Calculation of Manual
Calibration Parameters. Once you have
calculated the parameters, follow the procedure
below to perform a manual calibration:
1. If in Auto Mode (Auto LED illuminated),
press the Auto/Man Key to put the MVS
in Manual Mode. The Auto LED turns off.
2. Use the Arrow Keys to scroll to the
desired channel.
3. Press the Menu Key to display the Main
Menu. The display shows:
MAIN MENU
Disp I/O Cal
F1 F2 F3
4. Press the F3 Key to access the Cal
Menu. The display shows:
CALIBRATION MENU
Auto
Manual
F1 F2 F3
5. Press the F3 Key to access the Manual
Menu. The display shows:
MANUAL CAL MENU
ScfCnt
ScfWgt
F1 F2 F3
Note
Reset has no affect on analog scale
factor counts and analog zero counts.
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