TABLE 3

Pitfalls in Use of a Dose Calibrator

Type of usePitfall
RoutineSource not centered in dipper
Contamination of dipper or liner
Incorrect isotope button selected
Extraneous source affecting reading
High voltage not as needed for correct operation
Negative reading due to rezeroing when contamination is present
Not enough time allowed for reading of low-activity source
QCRequired QC testing not performed in regulatory time frames
Inconsistent geometry for QC testing
Incorrect correction factors (linearity testing)
Incorrect source information (constancy, accuracy testing)