BOREAL LASER GasFinder2, Operation Manual

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9.6
Boreal Laser Inc. GasFinder2 Operation Manual — Appendices July 17th 2017
Explanation of R 2 (continued)
A typical plot of concentration versus R
2
will give the following graph:
With lower levels of sample gas, the R
2
s
decrease, and equal zero when there is
no gas present. As the signal from the gas
becomes stronger, the effect of noise, both
electronic and optical, is reduced and the
R
2
s will increase (i.e., the signal to noise
ratio will increase). The general shape of the
plot is the same for all gases; however, the
x-axis values will depend on the sensitivity
of the instrument to the gas species being
observed.