HF Series Generators
Calibration
CA-1036R2
20
Generator tries to calibrate each kV / mA combination for ten (10)
attempts (maximum). If calibration is cancelled (after ten attempts),
message “Auto calibration failure” is shown on the screen until press the
“Auto Calibration” button to exit from Auto-calibration mode and go back
to the GSM menu. Calibration can be also cancelled due to space charge
during calibration of the lowest kV at the highest mA stations for the Focal
Spot selected, so message “Auto calibration failure” is also shown on the
screen until press the “Auto Calibration”buttontoexitfrom
Auto-calibration mode and go back to the GSM menu.
ONLY IF AUTO-CALIBRATION IS CANCELLED DUE TO
“AUTO CALIBRATION FAILURE”, CONTINUE THE
AUTO-CALIBRATION PROCEDURE FOR THE OTHER FOCAL
SPOT. CHECK AT THE END OF THE AUTO-CALIBRATION
PROCEDURE WHICH kV / mA COMBINATIONS HAVE NOT
BEEN AUTO-CALIBRATED FOR EACH FOCAL SPOT (THESE
COMBINATIONS HAVE THE FILAMENT CURRENT NUMBER
SET TO “344”). MANUALLY CALIBRATE THESE kV / mA
COMBINATIONS AS EXPLAIN IN SECTION 2.5.2.
When Auto-calibration is successfully performed, message “Auto
Calibration OK” is shown on the screen until press the “Auto Calibration”
button to exit from Auto-calibration mode and go back to the GSM menu.
8. Repeat the same procedure for the Large Focal Spot.
Enter in Auto-calibration mode by pressing the “Auto Calibration” button
on the GSM menu.
Select an available workstation (WS) of the X-ray Tube to be calibrated
and press the “ OK” button. This workstation has to be one of the
previously configured as “Direct”.
Select the Large Focal Spot by pressing the “Large” button and then
press the “OK” button.
Confirm or leave the Auto-calibration by pressing the respective button
on each screen.
Auto-calibration is activated when the “Auto Calibration” button is lighted.
At this moment, the Generator has checked the mA stations available for
the Large Focal Spot.
Before starting the exposures, it is recommended to wait until the Heat
Units value displayed are close to the 20%.
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