If a barcode is scanned using the delete key that isn't present in the database or that
already has a quantity of '0' a low error beep is sound and a red led is shown.
Negative quantities are by default not supported, but when using the 'Negative quantities'
option (see Appendix A) it is possible to scan negative quantities of barcodes. When a
specific barcode has a negative quantity the led color changes to from green (add) or
orange (subtract) to red on a good read and the sound becomes slightly lower.
6 Deleting the database file from the internal RAM disk
It might be possible that your OPN2002/3 has a full or corrupt RAM disk or contains
unwanted barcode data that you want to delete from the OPN2002/3. In this situation it is
possible to read the label below to erase all files from the RAM disk.*
_+-FORMAT-+_
When using the OPN2002/3 in USB-MSD mode, then it’s also possible to delete the file
manually using a file browser.
* Note: If the battery of the OPN2002/3 goes dry, then the OPN2002/3 won't immediately
loose its barcode data. However, after a few days after becoming empty all data on the
RAM disk will be lost. Also the internal clock will reset if the battery is completely drained.
This requires the correct time to be reconfigured using Appload.
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