HF Series Generators
Calibration
CA-1036R2
24
7. Exit from the “User Mode” screen by pressing the “Manual Calibration”
button. Select 80 kV and lowest mA station available (first combination
available). Enter a Filament Number of “344” for this combination.
8. Make an exposure. The mAs read on the mAs Meter must be the same
mAs displayed on the calibration screen with a tolerance of ±0.1mAs
(tolerance of the parameter and mAs Meter). If the mAs read is close to
zero, increase the filament number in big steps (a.e. increase values in
40). As the mAs read is close to the mAs displayed on the Console,
increase (or reduce) the filament number in smaller steps (a.e. increase
value in 30, 20, 10, ...).
If the mAs is low, increase the filament number. If the mA is high,
decrease the filament number. Press the “Store” button before making
a new exposure. Repeat until the mA station is calibrated.
Press the “Store” button to store the new data (filament number)
before selecting the next kV or mA stations.
Calibration data (presently in memory) may or may not be
close to your requirements. If it is not close, the potential
exists to damage the X-ray tube (i.e. too much mA). Thus, as
you start the mA calibration procedure note how close or how
far off the mA break points are. If a large adjustment (more
than 40 points) is required at the low mA stations, make
estimated adjustments to the high mA stations before
those
exposures are made.
9. Select the next mA station at 80 kV. Before making any exposure, enter
as filament number the value calibrated for the previous mA station
increased in 10.
If the mAs is low, increase the filament number. If the mA is high,
decrease the filament number. Press the “Store” button before making
a new exposure. Repeat until the mA station is calibrated.
Note .
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