ABB GLA131 Series Microportable Analyzers
User Manual
ABB PROPRIETARY INFORMATION
50
Figure 42: Absorption Peaks off Target Lines – Voltage Adjustment Required
Laser adjustment may be required if the analyzer has not been operated for a long
time, and the laser’s wavelength has drifted beyond the target range of the
analyzer.
WARNING!
Do not operate the analyzer outside the recommended
temperature range because this will result in unexpected behavior
or failures.
Figure 42 shows an example of a GLA131-GGA with an offset between absorption
peaks and target lines for laser A (top plot) and laser B (bottom plot). Both lasers
require adjustment.
To manually adjust the laser wavelength:
1. Click the Setup button on the Control Bar. (Figure 25)
2. Select the Laser Adjust tab at the top of the screen. (Figure 42)
3. Select the Disable Laser Frequency Lock checkbox 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: Up Arrow - peaks adjust
to the right; Down Arrow - peaks adjust to the left.
5. If applicable, adjust the Laser B Voltage (bottom plot) using the arrow
buttons to shift the peaks until they are centered on their respective target
