Thermonicolet Omnic Software User's Guide 6.1 (PDF) - Charles E ...

Resetting the spectrometer
at the start of data collection
If you find that the interferogram peak in the live display tends to drift from its
normal location, turn on Reset Bench At Start Of Collection. This repositions the
peak before data collection starts.
Starting data collection
with an external trigger
Diagnostic and
alignment features
Turn on Start Collection At External Trigger if you want data collection to begin
automatically when a signal is received from another application. Use this option
only in specialized experiments—such as gas chromatography FT-IR—in which
data collection is synchronized with some external event. Special hardware is
required.
When you click the Diagnostic tab, special diagnostic and alignment features appear.
At the left side of the dialog box is a live display of the detector signal. This
display is similar to the live display provided on the Bench tab. See “Using the
live display” for more information.
Above the live display are several indicators that you can click to check the
operation of spectrometer components. See “Checking spectrometer components”
for more information.
If you have a sealed and desiccated Nexus spectrometer, you can use the Check
Desiccant button to check the performance of the desiccant. See “Checking the
desiccant” for more information.
If your spectrometer can be aligned automatically, you can use the Align button to
perform an automatic alignment of the interferometer to maximize the detector
signal. See “Aligning the spectrometer” for more information.
If the interferogram peak has drifted from its normal location, you can click the
Reset Bench button to reposition the peak.
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