SHB_U14 Chapter 8: Calibration
8-3
Optical Alignment
Accessories • Screwdriver
• Emitter wrench, part number 096 79 80
• Zero gas
• PC with test and calibration software
(after AO software version 1.3 can also be performed via the AO user interface)
When should optical
alignment be
performed?
• After removing/installing beam path components
Emitter, sample cell, calibration cell, optical filter, filter cell, IR detector
• Offset value greater than 20%
• After repairing sample gas path leaks (zero gas distortion)
• After cleaning the sample cell
• Routinely every 6 to 12 months (depends on operating conditions)
Note • Optical alignment causes the emitter intensity to be equal on the sample and
reference sides of the IR detector.
• Each beam path in an analyzer module must be optically aligned separately.
• If there are two IR detectors in a beam path, select the rear detector for
alignment.
No optical alignment is possible for an oxygen sensor.
Preparation • Establish communication with the analyzer module via TCT.
Menu: Calibration
• Connect the zero gas
- Analyzer module with sample gas/zero gas solenoid valve:
Connect the zero gas to the module zero gas port.
- Analyzer module without solenoids:
Connect the zero gas to the module sample gas port.
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