OEC 9800C-Arm, Service Manual

Page: 334 / 490

Calibration
Camera Decentration
1. Verify camera decentration as follows:
a. Select the MAG1 mode.
b. Rotate the CCD Camera to the full Counter clockwise position.
c. X-ray through the beam alignment tool and mark the center of the alignment tool on the monitor with a small dot using
an erasable marker.
d. While making a Fluoro exposure, rotate the camera completely through its rotational travel and verify that the dot made
with the marker does not deviate outside the largest ring in the center of the beam alignment tool (see following picture).
2. Calibrate Camera Decentration as follows:
a. Select the MAG1 mode.
b. Rotate the CCD Camera to the full Counter clockwise position.
c. X-ray through the beam alignment tool and mark the center of the beam alignment tool on the left monitor with a small
dot using an erasable marker.
d. Rotate the camera 90º clockwise (90ºfrom full counter clock wise) and make another exposure and mark the center of
the beam alignment tool on the monitor.
e. Rotate the camera another 90º clockwise (180ºfrom full counter clockwise) and make another exposure, mark the center
of the beam alignment tool on the monitor.
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Service Periodic Maintenance Contents Schematics Illustrated Parts Installation