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USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
Manually Adjust the Laser Offset
1.
Click the Setup button on the User Interface Control Bar . (Figure 22)
2. Select the Laser Adjust tab at the top of the screen. (Figure 39)
3. Select the Disable Laser Frequency Lock check box to allow manual control of the
laser.
4. Adjust the Laser A Voltage using the arrow buttons to shift the peaks until they are
centered on their respective target lines.
a. Up Arrow: Peaks adjust to the right
b. Down Arrow: Peaks adjust to the left
5. Deselect the Disable Laser Frequency Lock check box. The software resumes
automatic tracking and control of the laser wavelength.
6. Click Close to exit the menu and return to the Main panel .
Figure 40 shows an example of the laser voltage adjusted so that the absorption peaks are
centered on the target lines.
Figure 40: Absorption Peaks Centered Correctly on Target Lines (250ppm CH
in air)
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