Universal APX 525 - Alternate Calibration Procedure

APX 525/625 Generator Revision C Service Adjustments
© 2005 Del Medical Imaging Corporation
7/5/2005 Page 141
Focal Spot
Small
kV
84 kV
mAs
114 mAs
8. Make an exposure and verify that the kV and mA waveforms for the small focal
spot are correct. The kV and mA waveforms should rise together and stabilize
without any noticeable overshoots or undershoots.
9. After the generator’s performance has been verified, you may turn the generator
OFF.
Alternate Calibration Procedure
Del Medical Imaging recommends using a Dynalyzer™ to calibrate the APX 525/625
x-ray generator. Calibrations done with a Dynalyzer™ will return the generator to
within the published specifications. Calibrations done with other forms of test
equipment may not bring the generator to within published specifications.
The following alternate calibration procedure can be used if no Dynalyzer™ is
immediately available to prove the electrical functionality of the machine.
Incorrectly connected mAs meters or mAs meters with hidden defects may cause
damage to the x-ray tube filaments.
1. With power off, attach the scope probe to TP14 (MA+) on the mother board
2. Attach the scope ground clip TP13 (-mA) on the mother board
3. Set the scope for a time base of 10 mSec. per division, a vertical deflection of 1
or 2 volts per division
4. Place the mA/Rotor board on the extender card
5. Turn the controller on
6. Set the generator to:
Mode
3 point
kV
60
mA
250
Focus
Large
Time
200 mSec