NCR RealScan 7875-7000 - Calibrate the Scale; Verify the Calibration

NCR RealScan 7875-7000/8000 Installation Guide
06/03 AIP-00342 Release B
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Calibrate the Scale
1. Press the Scale Zero Button to display the Cal and PAr values. Record these values.
2. Install the Produce Guard if one is included then install the Top Plate. Raise the front edge
of the Top Plate enough to access the Calibration Switch and press it, then quickly lower the
Top Plate. The display should show Ready C-00 kg (00 lb.).
3. Follow the sequence of steps in the following chart.
Display Add Weight Remove Weight
Ready C-2.5 kg (05 lb.) 2.50 kg (5.00 lb.)
Ready C-05 kg (15 lb.) 2.50 kg (10.00 lb.)
Ready C-10 kg (30 lb.) 5.00 kg (15.00 lb.)
Ready C-00 kg (00 lb.) 10.00 kg (30.00 lb.)
Ready 0.000 kg (0.00 lb.)
Verify the Calibration
The scale accuracy test meets government requirements of testing the accuracy of the scale after
performing a scale calibration. It contains a series of four tests that must be run in the continuous
sequence given.
Increasing Load Test
This test checks the scale’s accuracy when incrementally adding weight to the center of the top
plate. Use weights that correspond to the RealScan 7875 weight feature.
Step Weight Feature Add Weight Remove Weight Display Result
1 9.995 kg 0.1 kg 0.1 ± 0.00 kg
13.995 kg 0.1 kg 0.1 ± 0.00 kg
30.0 lb. 0.2 lb. 0.2 ± 0.00 lb.
2
9.995 kg 2.5 kg 0.1 kg 2.5 ± 0.00 kg
13.995 kg 2.5 kg 0.1 kg 2.5 ± 0.00 kg
30.0 lb. 5.0 lb. 0.2 lb. 5.0 ± 0.00 lb.
3
9.995 kg 2.5 kg 5.0 ± 0.005 kg
13.995 kg 4.5 kg 7.0 ± 0.005 kg
30.0 lb. 5.0 lb. 10.0 ± 0.01 lb.
4
9.995 kg 2.5 kg 7.5 ± 0.005 kg
13.995 kg 3.0 kg 10.0 ± 0.005 kg
30.0 lb. 10.0 lb. 20.0 ± 0.01 lb.
5
9.995 kg 2.495 kg 9.995 ± 0.005 kg
13.995 kg 3.995 kg 13.995 ± 0.005 kg
30.0 lb. 10.0 lb. 30.0 ± 0.01 lb.
Note: Do NOT remove any weight from the Top Plate.