OEC 9800 Periodic, Процедура технического обслуживания

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OEC 9800 Periodic Maintenance Procedure
43
Service Periodic Maintenance Contents Schematics Illustrated Parts Installation
Centering
Using the film and a ruler, verify the center of the image is centered on the sheet of film (X
offset
+ Y
offset
= Sum. Record
the values measured and calculated on the PM Form. Verify that the Sum is < 16 mm (13/16”) or 2% SID.
Normal Field Verification
Record the values measured and calculated for each of the following steps, on the PM Form.
1. Using the film, measure the Normal field exposure X and Y (X
Film
and Y
Film
) diameters and record them in the
measurement table found at the end of the Beam Alignment Test.
2. Make a Normal mode Fluoro exposure. Using the scale on the beam alignment tool, measure the X and Y
diameters (X
Fluoro
and Y
Fluoro
) displayed within the digital mask on the Workstation.
3. Calculate the absolute value of the difference between the film and Workstation X axis values (X
Film
– X
Fluoro
= X
Diff
).
Verify that the difference recorded is less than 28 mm (3% SID).
4. Calculate the absolute value of the difference between the film and Workstation Y axis values (Y
Film
– Y
Fluoro
= Y
Diff
.).
Verify that the difference recorded is less than 28 mm (3% SID).
5. Calculate the sum of the values in Steps 3 and 4 (X
Diff
+ Y
Diff
= Sum). Verify that the sum is less than or equal to 36
mm (4% SID).
MAG1 Field Verification
Record the values measured and calculated for each of the following steps, on the PM Form.
1. Using the film, measure the Normal field exposure X and Y (X
Film
and Y
Film
) diameters and record them in the
measurement table found at the end of the Beam Alignment Test.
2. Make a Normal mode Fluoro exposure. Using the scale on the beam alignment tool, measure the X and Y
diameters (X
Fluoro
and Y
Fluoro
) displayed within the digital mask on the Workstation.