Adjustments and Calibration
11
6. Place the test weight over one of the other three corners and use that load cell’s potentiometer to adjust the
load cell output down to the reference cell output.
7. Repeat this procedure with the other two high corners.
Adjustments are somewhat interactive, and adjusting the three higher outputs may affect the reference cell output,
especially in smaller scale decks. Rezero the indicator and repeat the test until all corners read within ±.1% of the
test weight used.
3.3
Calibration Procedure
Refer to the indicator manual to determine correct calibration procedures.
It is recommended that the scale be
exercised
before calibration to be certain that everything is seated.
1. Load the scale to near capacity two or three times.
2. With no load on the scale, place the indicator in its calibration mode and perform a zero calibration.
3. Place test weights on the platform equal to 70% - 80% of the scale’s capacity. If several weights are used,
they should be evenly distributed around the platform.
4. Perform a span calibration.
5. Remove the test weights and check the zero reading.
6. Repeat the calibration process if necessary.
