FieldServer FS-8700-103 - Manual (Page 18)

FS-8700-103_ATMI_TGM_Serial Manual Page 18 of 28
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Appendix B.3. Adding/Modifying Gas Concentration Value Engineering Units
The configuration CSV file can be used to modify the table of engineering units that is hard
coded into the driver. This table is presented in Appendix A.3
Add a section to the configuration file which is similar to the following example.
In the example below the Units specified is ‘PPM’, an entry from the existing list. When the
driver finds the lines below, it will update the index value to 20.
// Change index value of existing unit to 20.
Driver_Table
TGM_Units_Name, TGM_Units_Index_Value, Protocol
PPM, 20, TGM
In the example below the units specified are ‘gpl’ and they have been assigned an index
value of 7.
// Add a new engineering unit
Driver_Table
TGM_Units_Name, TGM_Units_Index_Value, Protocol
gpl 7, TGM
Appendix B.4. Adding / Modifying Hard Coded Gas Names
When a gas concentration is reported, the driver reports the gas name by looking up the gas
name in a list of hard coded gas names. When a match is found the driver stores the
associated index value. The table may be modified/extended in the configuration CSV file.
The table of names and index values is provided in Appendix A.1
Add a section to the configuration file which is similar to the text found in the examples
below.
In the example below the gas name specified is ‘H2’, an entry from the existing list. When
the driver finds the lines below, it will update the index value to 20.
// Change index value of existing gas to 20.
Driver_Table
TGM_Gas_Name, TGM_Gas_Index_Value, Protocol
H2, 20, TGM