LUDLUM 3030, Руководство пользователя

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Model 3030 & 3030E Series Technical Manual
Section 7
Ludlum Measurements, Inc. Page 28 November 2017
CPM to DPM using a factor of 2 may not be correct, depending
on isotope and source material. Note that these source sizes are
completely independent of the source sizes used in the HV
plateau. After entering the values, press the “Update” button.
Enter in upper and lower background limits for both alpha and beta
background. Since alpha background is usually very low, it is acceptable to
use a lower limit of 0. After entering the values, press the “Update” button.
To start a QC check:
1. Press the QC CHECK button on the front of the Model 3030. The
Model 3030 does not need to be connected to a computer for the
QC check to function.
2. If the Normal QC mode is selected, the upper LCD should flash
ALPHA. Unlatch the tray and insert the alpha source. Close and
latch the tray.
3. Press the COUNT button to start the alpha count. At the end of the
count, the LCD will flash between displaying the final readings and
ALPHA. If the QC Check fails, the instrument should be taken out
of service until it can be repaired.
4. Unlatch the tray and remove the alpha source. Insert the beta
source and close and latch the tray.
5. Press the COUNT button to advance to the beta step. The lower
LCD should now flash BETA.
6. Press the COUNT button to start the beta count. At the end of the
count the LCD will flash between displaying the final readings and
BETA. If the QC check fails, the instrument should be taken out of
service until it can be repaired.
7. Unlatch the tray and remove the beta source. Close and latch the
tray.
8. Press the COUNT button to advance to the background count.
Both displays should flash BAC.
9. Press the COUNT button to start the background count. At the
end of the count, the LCD will flash between the readings and BAC.
If the QC check fails, the instrument should be taken out of service
until it can be repaired.