GSE 672 - Known Loadcell Output Calibration

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Known Loadcell Output
Known LCOut is used to calibrate without test weights. The exact full scale mV/V rating must be known
for each load cell. All load cells must be of the same full scale capacity. This procedure works best for
hopper scales where weight is evenly distributed and signal trimming is not required.
TO PERFORM A KNOWN LOADCELL OUTPUT CALIBRATION:
1. Access the calibration mode as described on page 23.
2. Select the Known LCOut calibration method as described in Calibration Methods on page 23.
3. Press
 at the Known LCOut prompt to display #of LC.
The number of load cells specified during the last calibration will also be displayed. A value of
zero (0) indicates that this calibration method has not yet been performed.
4. Key in the number of load cells (8 maximum) and press
.
- or -
Press
 to accept the displayed value.
5. The display prompts
LC#x mVv (where ‘x’ is the load cell number) and then shows the mV/V
value (0.1 Æ 5.0) last entered for this load cell.
6. Key in the load cell’s mV/V value and press
.
- or -
Press
 to accept the displayed value.
7. Steps 5-6 will be repeated for as many load cells as specified in step 4.
8. The display prompts
LC FS showing the value last entered for the load cell full scale.
9. Key in the full scale capacity for the load cell(s) and press
.
- or -
Press
 to accept the displayed value.
10. The display briefly shows
Updtg Gains as it updates the gain values, then prompts CurWt
Zero?
.
11. Press
 to establish the current input signal as the zero reference.
- or -
Press
> to display Zero=0mVv?. Press  to use a 0mV/V output as the zero reference.
- or -
Press
> to display Keyin CurWt. Key in the known gross weight already applied to the
scale and press
.
- or -
Press
K to bypass the zeroing option.
12. The display shows
CAL OK? suggesting that the calibration is acceptable.
Accept the calibration by pressing
 at the CAL OK? prompt.
- or -