1. Test overview.
This test is used to adjust the film carrier so that RGB image is of the same size of that IR image.For that, the scanner will scan one B&W film in RGB and in IR, will go on finding the size of each image and calculate the ratio of it. A ratio of 1,0000 means that 2 images are exactly of the size.
Note : the size of the image is in ratio of the distance Film CCD. The size is amended by pushing in more or less the film carrier in the scanner, so that measurement in RGB is made at the same level that of IR measurement.
2. Test conditions.
This test relates to the 135 Film carrier inserted in the scanner.The 135 Film carrier must be inserted in the scanner to carry out this test.
A short B&W film must be used for this test (ref. 070 100 422A):
No parameter is saved.
3. Pre-requirements.
- CCD IR Test is accepted to ensure that the measurement of the IR signal is correct.
- 135 Pre-Sharp Test is accepted to ensure that the IR image will be sharpish enough.
- 135 Cal Pre-V-Offset On Edges Test is accepted to ensure that Voffset is correct.
4. Test realisation.
Click on RUN to carry out the test. A message will appear asking to insert the short B&W film. When the film is inserted (caution : watch for the direction of film), click on OK.The scanner will scan the first exposure of film in RGB and in IR then will go on to automatically detect the crosses present on film in order to calculate the size of each image (see Automatic crosses detection for more information on this subject).
When this is completed, the ratio will be displayed, the test will be accepted or rejected accordingly.
5. Test acceptance.
The test is accepted if the ratio (image size IR / image size RGB) lies between 0,9990 and 1,00106. Autres tests impactés.
If the ratio is outside the tolerances, the following tests will be affected :- 135 Cal encoder 2.
- 135 Cal RGB-IR.
- 135 ADDR.
7. Trouble shooting.
