ORTEC EASY-MCA-2K, Руководство пользователя

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ORTEC
®
EASY-MCA™ Digital Gamma-Ray Spectrometer User’s Manual 931044C / 1014
14
You can enter the MDA preset either in counts; or corrected for factors such as
sample volume, attenuation, or calculated efficiency. For example, if you man-
ually calculate the efficiency for a peak, you can enter a corrected MDA target
value by multiplying the desired MDA value times the calculated efficiency, and
entering the product as the Correction.
To add an MDA preset, enter the preset value in the MDA or Correction field; select the
Nuclide and Energy; enter the desired values for coefficients a, b, and c; then click Add New.
To edit an existing preset, click to highlight it in the table. This will load its Nuclide, Energy,
and coefficients in the lower sections of the dialog. Change as needed, then click Update.
To remove a preset, click to highlight it in the table, then click Delete.
2.4. Troubleshooting
2.4.1. MAESTRO Does Not Connect with the EASY-MCA
If properly installed and functioning MAESTRO software (or other ORTEC spectroscopy
applications) cannot find and communicate with the EASY-MCA, check for the following:
!
The EASY-MCA does not have power.
!
The USB cable is not properly connected.
IMPORTANT
These MDA presets are not dynamically calculated. Each time you add an
MDA preset to this table, its CorrectionFactor value is calculated and stored
in the MCB’s memory. If you then load a different library, change the effi-
ciency calibration, or change the system geometry, the spectroscopy applica-
tion will not update the existing CorrectionFactors, and your MDA presets
may no longer be applicable.
When using spectrum analysis applications such as GammaVision and
ScintiVision, you can create an analysis options file (
.SDF
or
.SVD
file) for
each system geometry that you use; and include in it a set of MDA presets
specific to that geometry, efficiency calibration, and nuclide library. You can
then recall this tailored analysis options file as needed.