Canon CXDI-80C, Руководство по обслуживанию

Страница: 155 / 164

6. Troubleshooting
-
14
-
5. Precautions for performance test and self-diagnosis
imaging
It is possible to use QC Tool (Quality Control Tool) on the CXDI software (CXDI Control
Software NE, etc.) to run calibration, performance test, and self-diagnostic test functions.
Calibration is a function that performs dose checking as well as generating and updating
correction data for adjusting the sensor in order to maintain normal sensor characteristics.
The performance test function exposes an X-ray image with no subject present and compares the
result with the calibration screen data to evaluate sensor performance and determine whether or
not it meets the setting standards.
The self-diagnostic test function can be used to perform a self-test of the sensor only, without
making an exposure using X-rays. It includes test functions such as internal device check, test
pattern check, and offset correction test. Note that the device check function is not available for
still image sensors without Ferry support (CXDI-55G, CXDI-55C, etc.); it is only available on
still image sensors with Ferry support (CXDI-70C, CXDI-80C, etc.).
Listed below are the precautions to be heeded during performance test and self-diagnosis
imaging.
[Performance test]
The performance test only performs Mode 1 (which corresponds to the former Test 1).
•
This must be carried out after checking that the system is operating normally after installation.
•
Confirm that calibration has previously completed successfully.
•
Performance test imaging must be implemented in order to check the conditions resulting after a
system has been newly installed and after the photo timer adjustments have been carried out.
When this is done, the resulting files must be taken back together with the files produced from
the self-diagnosis imaging and stored in a safe place.
* Recording of performance test or self-diagnostic test files can be enabled by starting Collection
Tool from among the service tools, selecting the [QC result] category, and checking the desired
items on the QC history list.
•
The entire detector surface must be exposed without a subject to the X-rays under the same
conditions as the calibration conditions where the system is installed.
•
When any kind of error has occurred, the calibration must be performed again.
•
If the error persists even after performing calibration again, the following must be checked while
referring to the images:
* The entire surface of the detector is appropriately exposed to X-rays.
* The X-ray exposure must be performed properly (there must be no shading anywhere on the
entire detector surface).
* As when performing calibration, the grid is not attached.
* It must be checked that the defects have been rectified properly.