NCR 7878 Scale Calibration - ScanSource Technical Services

7. Replace the clear plastic Calibration Switch Cover and install the Top Plate.
8. Exercise the scale. Exercising the Scale is a requirement for proper calibration
and is an integral part of the calibration procedure. Use the following procedures
to exercise the scale:
a. Place both hands on the deck and push down hard to place over 12.5kg
(30lbs) of weight on the deck. Continue pushing down on the deck until all
5 lights on the Light Bar turn red, then hold 2 more seconds until all the
lights turn blue.
b. Release your hands from deck when the scanner voice prompt says
“Complete”.
Note: The user has 90 seconds for all this procedure, including re-screwing the
Calibration Switch Security Cover before pressing the plate.
c. The scanner voice prompt says “press scale deck” and steps a and b are
repeated.
The 3 center LEDs turns green when the scale exercise procedure is
successful.
An Error Code 8 occurs when the scale exercise procedure fails. The scanner
voice prompt says “Calibration Error Code 8” and LED1 turns blue and LED2
turns green on the Light Bar.
After the exercising is complete the scanner will prompt with “Please wait
twenty seconds”. This is to allow settling time before the zero weight. The
display will count down and there are prompts at 15, 10 and 5 seconds. After
the twenty seconds the scanner will start asking for the weights.
9. If a display is connected, it should show C 0.000 kg (0.00lb).
10. Change the weight on the Top Plate in the sequence shown in the following table
when directed to do so by the scale’s display or voice messages.