Chapter 5: Calibration 5-15

Procedure 4: Shift Test

This test consists of measuring a weight in the center and four positions on the Top Plate.

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1

4

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Instructions

 

1.Place a 15.00 lb (or 5.000 kg) weight in Position 1 and record measured weight.

2.Move sequentially to Positions 2, 3, 4, and 5. Record measured weight for each position.

3.Move weight back to Position 1 and record measured value.

4.All measurements should fall within

15.00 lb ± 0.01 lb (for 30.00 lb scales)

5.000 kg ± 0.005 kg (for 9.995 and 13.995 kg scales)

5.If any measured weight does not fall within acceptable range, scale has failed test and must be recalibrated.

6.If the scale passes all four tests, the calibration is successful.

7.Now the calibration seals, if required by local laws, can be placed and the Calibration Switch secured before reassembling the unit.

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NCR 7870 manual Procedure 4 Shift Test