Checking System Functions Preva
14
New Tube Seasoning Procedure
X-ray tubes that sit dormant for several months can become electrically unstable.
To remedy this condition, it is recommended you perform a “new tube seasoning
procedure.” This process establishes stable high voltage operation and will
ultimately extend the life of the tube. Repeat this procedure before returning to
normal operation any time the system has been unused for more than two
months.
1. Verify system operation.
2. Energize
the
system.
3. Select 60 kilovolts, 7 milliamperes, and the exposure time of one second.
4. Make five exposures at this level, observing the normal cooling time.
5. Select 65 kilovolts, 7 milliamperes, and the exposure time of one second.
6. Make five exposures at this level, observing the normal cooling time.
7. Select 70 kilovolts, 6 milliamperes, and the exposure time of one second.
8. Make five exposures at this level, observing the normal cooling time.
