Service manual

LUMISCAN ACR-2000 READER SERVICE MANUAL - SECTION 5.0 SERVICE ADJUSTMENTS
5-12
18. It is now necessary to make a new CAL Table. To do this proceed to 5.4.5 Calibration Table
Generation.
5.4.5 Calibration Table Generation
5.4.5.1 Using NT Driver Disk prior to version 2.00.
1. Place a well erased 14 x 17” image plate into a cassette. Expose with a dose of 4 mAs at 85 kVp, 71”
SID. If a 1mm thick copper plate is available, position the copper plate over the x-ray emitter. This will
provide a more uniform exposure. Verify with a high resolution x-ray dose meter that the dosage is
4 mR +/- 0.05 mR. Be sure the shutters are opened sufficiently to provide full exposure to the entire
image plate. Expose the image plate with nothing on top of it.
2. While in the "TOOLS" directory, scan a full width plate with a uniform field (exposed plate) using
special /NOEDGE and /DS:3 switches.
“...TOOLS>SCANFILE /NOEDGE /DS:3”
This scans at full width scan mode 3 which bypasses the CAL table.
3. While in the "TOOLS" directory, run MKCAL.
“...TOOLS>MKCAL LSDT.IMG CALXXXXX.DAT -F 2 -N 1000 -Z 160”
Copy the CAL table file into the WINNT\SYSTEM32\DRIVERS directory.
Use the LSDT Control panel to select the CAL table filename.
4. Restart the computer.
5.4.5.2 Using NT Driver Disk version 2.00 or later or DOS/95/98 version 3.60 or later.
1. Place a well erased 14 x 17” image plate into a cassette. Expose with a dose of 4 mAs at 85 kVp, 71”
SID. If a 1mm thick copper plate is available, position the copper plate over the x-ray emitter. This will
provide a more uniform exposure. Verify with a high resolution x-ray dose meter that the dosage is
4 mR +/- 0.05 mR. Be sure the shutters are opened sufficiently to provide full exposure to the entire
image plate. Expose the image plate with nothing on top of it.
2. From the “tools” directory, run “...TOOLS>MKCALTBL <Serial Number>”. The program will
scan the plate and automatically install the new CAL Table.
3. Restart the computer.