biodex ATOMLAB 500, Руководство по эксплуатации и обслуживанию, Страница: 75 / 212

6. Dose Calibrator Quality Assurance
The Dose Calibrator Quality Assurance programs allow the user to perform and record a variety
of system tests to assure the integrity of the readings and calculations.
To access the Dose Calibrator Quality Assurance functions, at the Home screen touch <Dose
Calibrator Quality Assurance>. The QA Dose Calibrator screen is displayed.
QA Dose Calibrator
Figure 6.1. The QA Dose Calibrator screen serves as the main menu of QA
functions.
The QA Dose Calibrator screen serves as the main menu for the QA section of the system. From
this screen, any of the eight QA procedures can be accessed:
•
Constancy Test
•
Constancy Test History
•
Geometry Test
•
Geometry Test History
•
Accuracy Test
•
Accuracy Test History
•
Linearity Test
•
Linearity Test History.
Constancy Test
This test allows the user to put a calibrated sealed isotope into the detector and check to
ensure the system is correctly reading the activity. Each detector must be checked individually.
The Atomlab 500 allows entry of the sealed sources into inventory and decay-corrects these
sources for time. These sources are used for the testing of the dose calibrator chambers.
Constancy means reproducibility in measuring the same source over a period of time with
decay correction. Assay a relatively long-lived source (such as Cs-137) each day before using
the calibrator.