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FS-8700-103_ATMI_TGM_Serial Manual Page 15 of 28
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Appendix A.3. Gas Concentration Engineering Units
This table is used by the driver when storing data from the QLA report. The driver looks the
reported engineering units up in this table. If an matching entry is found then the driver
stores the index value. If a matching entry cannot be found then the driver stores a value of
–1. (Note that when –1 is stored in a BYTE or UINT16 formatted Data Aray it will appear as
a positive number such as 255 (Byte Array) or 65535 (uint16 Array).
The table may be extended/modified using the configuration file. Refer to Appendix B.1
Engineering Units Index Value
Error / Unknown -1
ARU 1
PPM 2
PPB 3
LEL 4
% 5
PCT 6