4.CALIBRATION
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4-5. Span Calibration
In this procedure, a known test load is placed on the cell to adjust the meter to
indicate the desired reading.
1. Place a Weight with exactly the same value as defined in Balance weight value
on the load cell. (Heavier than 50% Capacity load is recommended for better
linearity.)
2. Check the load cell is free from undesired extra loading: extra foreign object
on the weighing plate, or contact with peripheral object.
3.
Make sure that the “stable” bit (10th bit of n+5 CH) is set to “1”.
(Calibration procedures must be performed while reading is stable)
4. Toggle the Span calibration bit (1st bit of n+1 CH) from “0” to “1”.
5. F159 starts Zero calibration procedures when it acknowledges an ON edge (0
→
1) of the Span calibration bit.
6. Span calibration in progress bit (5th bit of n+6 CH) turns on “1”. Do not touch
the sensing portion (load cell) while this bit in on.
7. Make sure that the reading exactly coincides with the desired value (e.g.,
Balance weight value).
8. Toggle the Span calibration bit (1st bit of n+1 CH) back to “0”.
If any of calibration errors occur, the user must take appropriate
measures to correct the error, and retry Zero calibration.
For further information about the error codes, see
