26
Figure 14: AccuLase-GPA™ Calibration Curve
The calibration curve in Figure 22 is based on the calibration parameters shown in Figure 21. As can be
seen from the equation displayed on the calibration curve, the slope and intercept are the same as those
shown in the analyzer calibration parameters. From this curve, the analyzer can calculate the true
concentration of the target gas for any raw concentration reading.
The Cal. Gas Concentration field displays the certificate value for the span calibration gas being used. To
edit this value, use the FIELD NEXT / FIELD PREV buttons on the keypad to select the Edit button on the
Calibration panel, then press Enter. Using the numerical keys, enter in the certificate value from the span
calibration gas being used, then press ENTER to save to the analyzer. The value displayed in the left field
should then change to match the entered value.
The Current Concentration field displays the currently calculated concentration of the target gas in the
gas present in the sample chamber. The Calibrate Zero and Calibrate Span to the right of this field are
used to carry out zero and span calibrations.
3.9 Laser Panel
The Laser panel shows parameters related to the analyzer’s laser and laser detector. See Figure 23.
y = 1.0863x - 0.4128
0
2
4
6
8
10
12
0
2
4
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Tr
ue
C
once
nt
ra
to
in (ppm
)
Analyzer Reading (ppm)
AccuLase-GPA
TM
Calibration
