GE OEC 9800 - MAG1 Field Verification; MAG2 Field Verification

OEC 9800 Installation Procedure
34
Service
Periodic
Contents
Schematics
Illustrated
Installation
3. Calculate and record 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 and record 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 and record 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
Use the Measurement Data table in the corresponding section of the Report/Checklist to record the measurements and calculations
for the following steps:
1. Using the film, measure and record the MAG1 field exposure X and Y (X
Film
and Y
Film
) diameters.
2. Make a MAG1 mode Fluoro exposure. Using the scale on the beam alignment tool, measure and record the X and Y diameters
(X
Fluoro
and Y
Fluoro
) displayed within the digital mask on the Workstation.
3. Calculate and record 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 and record 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 and record 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).
MAG2 Field Verification
Use the Measurement Data table in the corresponding section of the Report/Checklist to record the measurements and calculations
for the following steps:
1. Using the film, measure and record the MAG2 field exposure X and Y (X
Film
and Y
Film
) diameters.