4 - 8 MP7000 Scanner Scale Integrator Guide
Calibration Failure
It is possible to encounter a failure condition in which the calibration process is interrupted. In this case, use the
error message indicators to fix the problem and re-start the calibration process.
If calibration failed, the Scale Display blinks CAL F, and the error code
u## scrolls on the 7-segment display (see
Table A-2 on page A-6 for error descriptions).
Possible Reasons for a Fail
• The scale returns to its prior state if
Step 4 - Calibration at NO LOAD executes and the Scale Display blinks
HOLD for the entire 30 second time period, and then times out. This condition does not display a calibration
failure because the process was unable to find a zero weight threshold. This may occur if the platter was not
re-installed or seated correctly, or if the weight on the scale is outside a +/- 2% maximum capacity range (+/-
0.6 lb or +/- 0.3 kg). It can also be a mechanical issue if the scale was not installed correctly.
• The scale returns to its prior state if
Step 5 - Calibration at LOAD executes but the scale was unable to detect
a load of 25 lb (or 11 kg, depending on the units of measure programmed). This may occur if the correct
weights were not placed on the platter before pressing the Scale Zero button. It can also be a mechanical
issue if the scale was not installed correctly.
In either case the scale can not accept the calibration, and returns to its prior state. There is no impact on the
sealed calibration counter or the scale legal parameter counter. However, if calibration fails, the scale is
non-operational until the problem is fixed and the scale is successfully calibrated. In this case, re-enter the
Calibration Mode
Step 1 - Electronic Entry into Calibration Mode on page 4-3. The scale does not have to be reset
and can be left on before re-entering Calibration Mode.
Calibration Mode Exit Conditions
Calibration Mode exits under the following conditions:
• No response is received from an external operator for 30 seconds. This timeout does not apply at
Step 6 -
Calibration Success or Failure
.
• The operator turns the MP70XX off.
• Step 5 - Calibration at LOAD completes successfully, or unsuccessfully (fails).
• A user scans Scale Reset (refer to the MP7000 Scanner Scale Barcode Programming Guide, p/n
MN-002912-xx). When Scale Reset is scanned, a test runs, showing a series of characters on the optional
Scale Display. When the test completes, the scale returns to its prior state before entering a scale Calibration
Mode. See
Table 4-6 on page 4-23 (Cold reset of scale) for the character sequence displayed.
Verification Test
Table 4-3 describes the five tests needed to verify whether or not the scale was calibrated successfully.
Table 4-3 Tests to Verify Scale Accuracy
Test Description
Increasing Load Test This test verifies accurate weight measurement with increasing weights placed
incrementally on the scale's platter, without returning weight to zero.
Over Capacity Test This test verifies that the correct indication appears on the Scale Display when the
maximum weight is exceeded.
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