OEC 9800C-Arm, Service Manual

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Calibration
20. In the new window that appeared, highlight and click on Download Ma Limit Data To 9800 . Verify that the mA Limit File
was downloaded to the 9800.
Note: The Mainframe will display Please Wait on the Control Panel while the files are being downloaded to the Mainframe.
When downloading is completed the Mainframe’s displays will return to normal.
Enter mA Limit Values Using UtilitySuite
1. In the upper left-hand corner, click on Tools.
2. In the Left-hand Window, click on mA Limit Editor. 4. When the mA Limit File Editor Window appears select Fluoro Mode.
3. Select Manual Fluoro mode and Normal Mag. Select 40 kVp @ 10 mA. During a Fluoro exposure, increase the kVp until the
Dosimeter reading is close to, without going over, the maximum corrected exposure rate of 9.26 R/minute. This is the
breakpoint.
4. Record the breakpoint at the corresponding kVp listing in the mA Limit File Editor Window.
5. Increase kVp to the next nearest setting that is evenly divisible by 5 kVp. Decrease mA to prevent the exposure rate from
exceeding 9.26 R/minute. Record the mA value in the mA Limit File Editor (at the corresponding kVp).
6. Repeat and record measurements, increasing kVp by five each time, for remaining kVp settings.
7. Once all of the 5 kVp increments are filled in from the start of the Breakpoint, click on the Interpolate Button.
8. In the mA Limit File Editor Window change the mode from Fluoro to HLF.
9. Select Manual Fluoro mode and Normal Mag. Select 40 kVp @ 20 mA. During a BOOST Fluoro exposure, increase the kVp
until the Dosimeter reading is close to, without going over, the maximum corrected exposure rate of 18 R/minute. This is the
breakpoint.
Note: 18.0 R/min is the maximum exposure rate of 20 R/min reduced by 10% (5% tolerance in setup values and 5% tolerance
of dosimeter.)
10. Record the breakpoint at the corresponding kVp listing in the mA Limit File Editor Window. Example, at 85 kVp you would
enter 20 mA.
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