Watch carefully.(that vertically written O2 values are corresponding to help you for HC). O2 values are always at X axis. AB line is not representing Oxygen..it represents A,C & D are HC values corresponding to Different O2 values. Like 0%HC at 21% O2, & 10% HC at 18.9% O2. Refer the calculation chart table.
but the oxygen conc is in x axis how is the ab line slanting and also why is ab representing oxygen
Watch carefully.(that vertically written O2 values are corresponding to help you for HC). O2 values are always at X axis.
AB line is not representing Oxygen..it represents A,C & D are HC values corresponding to Different O2 values. Like 0%HC at 21% O2, & 10% HC at 18.9% O2.
Refer the calculation chart table.
The corresponding values of HC AND OXYGEN are causing the Graph to look like that.
Try to plot with values yourself
But surveyors asking 1 more reason for that. What is it??
can u tell full detail //
I have explained it