Calibration
11. Increase kVp to the next nearest setting that is evenly divisible by 5 kVp. Decrease mA to prevent the exposure rate from
exceeding 18 R/minute. Record in the mA Limit File Editor at the corresponding kVp the mA value.
12. Repeat and record measurements, increasing kVp by five each time, for remaining kVp settings.
13. Once all of the 5 kVp increments are filled in from the start of the Breakpoint, click on the Interpolate Button.
14. When the Least Squares Polynomial Window appears click OK.
15. Click on File ->Save As-> Generator File. .
16. When the new window appears, the barcode should appear in the file name (if not, type it in) XXXXXXXX.mal (Mainframe’s
Barcode Number) then click on SAVE. Verify the File was saved.
17. Click on File->Save->To System->Generator.
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.
Verify mA Limit Values and Maximum HLF
1. Make a 120 kVp manual HLF exposure. Verify the reading is 18.0 +0.5 R/minute.
2. During a Fluoro exposure, increase kVp and verify that mA begins to decrease at the maximum corrected exposure rate.
3. Verify that the Dosimeter reading does not exceed the maximum corrected exposure rate of 9.26 R/minute throughout the
kVp range.
Note: It may be necessary to use the mA Limit File Editor to readjust the mA values.
4. Click File in the mA Limit File Editor screen.
5. Highlight and click on Save mA Limit File As.
6. When the new window appears, type in XXXXXXXX
.
mal. (XXXXXXXX
is the C-Arm serial number). Click Save and verify
that RUT saves the mA Limit file.
7. Click File again.
24
Service
Periodic Maintenance
Contents
Schematics
Illustrated Parts
Installation
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