Operation
Aligning Your Spectrometer
Thermo Scientific
Nicolet iS20 User Guide
7
3. Set the flowmeter to 10 scfh.
Aligning Your Spectrometer
Your instrument can be aligned automatically using OMNIC software. Alignment optimizes
the energy throughput to the detector. Alignment can change slightly over time, particularly
in locations that have large temperature swings or excessive vibration.
To align the spectrometer, use the
Align
button on the Diagnostic tab of the Experiment
Setup dialog box (available through the Collect menu in OMNIC software). For more
information, see OMNIC Help Topics in the Help menu.
Verifying the Laser Frequency
Use the Laser Verification button on the Diagnostic tab in the Experiment Setup dialog box in
OMNIC software to verify the laser.
For optimum system performance, verify the laser frequency according to the following
schedule:
NOTICE
Flow rates greater than 10 scfh can cause vibration that can affect data
quality. We recommend keeping the flow rate at approximately 10 scfh.
Note
The instrument is aligned automatically each time you run a Performance
Verification (PV) test. We recommend running a PV te
s
t at least once a month.
Spectrometer environment
Spectrometer state
Recommended Schedule
Stable
Always powered on
every 3 months
Unstable (e.g., temperature or
humidity constantly changing)
Powered on and off
frequently
every day or once a week
