Calibration
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4.2 EDP Command Calibration
To calibrate the indicator using EDP commands, the indicator COM 1 port must be connected to a terminal or personal
for more information about using EDP commands.
Once the indicator is connected to the sending device, use the following steps:
1. Place the indicator in configuration mode (display reads
CONFIG
) and remove all weight from the scale platform. If the
test weights require hooks or chains, place them on the scale for zero calibration.
2. Send the SC.WZERO EDP command to calibrate zero. The indicator displays
*CAL*
while the calibration is in
progress.
3. Place test weights on the scale and use the SC.WVAL command to enter the test weight value in the following format:
WVAL=
nnnnnn
<CR>
4. Send the SC.WSPAN EDP command to calibrate span. The indicator displays
*CAL*
while the calibration is in
progress.
5. To remove an offset value, clear all weight from the scale, including items used to hang test weights, and then send the
SC.REZERO EDP command. The indicator displays
*CAL*
while the zero and span calibrations are adjusted.
6. Send the KUPARROW EDP command to exit configuration mode.
4.3 Adjusting Final Calibration
Calibration may be affected by environmental factors such as wind, vibration, and angular loading.
Example: if the scale is calibrated with 1000 lb, a strain test may determine that at 2000 lb the calibration is 3 lb high. In this
case, final calibration can be adjusted by tweaking
WVAL
to 998.5 lb. This adjustment provides a linear correction of 1.5 lb per
1000 lb.
To adjust the final calibration, return to the
WVAL
prompt and press to show the test weight value. Press or to adjust
calibration up or down. Press to save the value. Press to return to the
CALIBR
menu.
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