Checking System Functions
Preva
53
Tube Seasoning Procedure
Note: Do not use this procedure immediately after Tubehead
replacement.
Refer to Page 69 for the Calibration 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 (kV), 7 milliamperes (mA), and the exposure time of one
second.
4. Make five exposures at this level, observing the normal cooling time.
5. Select 65 kV, 7 mA, and the exposure time of one second.
6. Make five exposures at this level, observing the normal cooling time.
7. Select 70 kV, 6 mA, and the exposure time of one second.
8. Make five exposures at this level, observing the normal cooling time.
Your Responsibilities As An Installer And Service Engineer
Verification of machine performance after installation must be performed according to the guidelines
identified in the “System Function Checklist” which may be found in the User Manual or, the Installation
and Service Manual on page 52.
Verification of machine performance after maintenance or repair must be performed according to the
guidelines identified in the “System Function Checklist” and the calibration instructions which may be
found in the Installation and Service Manual.
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