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Using the RamanFlex 400 Series . 57
Calibration and Performance Verification SOPs
Several different automated calibration tests are included in the software:
•
Wavelength (x-axis) calibration uses the position of precisely known lines in a neon
emission spectrum to calibrate the detector.
•
Intensity (y-axis) calibration is performed using coated glass with a well characterized
emission spectrum. This is used to correct for non-linearity in detector response.
•
Laser frequency calibration determines the exact laser wavelength.
An additional wavelength calibration verification routine has been included in the software,
which compares a series of peaks for polystyrene (ASTM E 1840) with values collected using
a polystyrene sample. These calibration/verification tests allow for in-house instrument
performance verification.
Intensity calibration is only performed if the instrument has been moved, or as part of an
annual service, or if there have been appreciable temperature variations in the local
environment.
Backgrounds are always collected during a calibration procedure. The background measures
the bias and dark signal over the selected area of the CCD. This is a necessary part of the
calibration routines, so it is always performed.
The spectrometer has no moving parts in its detection system; therefore frequent calibration
is not necessary.
We recommend that you calibrate the instrument in accordance with the following SOP.
SOP-6: Calibration/Performance Verification
We recommend that wavelength calibration verification is performed on a regular basis to
ensure that the instrument is performing within specification. This can be once a day or once
a week depending on your requirements and the laboratory environment.
When carrying out the calibration/verification procedures, the instrument laser power should
be set to 100% and the Data Interval to 2 cm
−1
or smaller.
On completion of the wavelength calibration verification, the result of the verification
procedure is displayed. A spectrum detailing the outcome of the verification (or calibration)
procedure is saved to the folder …\pel_data\config\Raman\Calibration Files\Logs with the
filename Calibration Report [Name of calibration][Date].sp
IMPORTANT: If the instrument passes the wavelength calibration verification procedure,
the instrument is optimized for performance and does not require wavelength calibration.
Содержание Raman Flex 400 Series
Страница 1: ...RamanFlex 400 Series Getting Started Guide MOLECULAR SPECTROSCOPY ...
Страница 5: ...Introduction ...
Страница 10: ...10 RamanFlex 400 Series Getting Started Guide ...
Страница 11: ...Safety Practices ...
Страница 24: ...24 RamanFlex 400 Series Getting Started Guide ...
Страница 25: ...Raman History Theory and Instrumentation ...
Страница 32: ...32 RamanFlex 400 Series Getting Started Guide ...
Страница 33: ...Preparing your Facility ...
Страница 37: ...Installing your RamanFlex 400 Series ...
Страница 44: ...44 RamanFlex 400 Series Getting Started Guide ...
Страница 45: ...Using the RamanFlex 400 Series ...
Страница 66: ...66 RamanFlex 400 Series Getting Started Guide ...
Страница 67: ...Maintenance and Troubleshooting ...
Страница 74: ...74 RamanFlex 400 Series Getting Started Guide ...