Calibration
Entrance Exposure Rate Limits Verification
1. Install Collimator cover over the Collimator assembly.
2. Position the 15cc Dosimeter Ion Chamber 30 cm above the Image Intensifier input grid. (Measure from the grid surface to the
center of the Ion Chamber.)
3. Measure the current atmospheric pressure in mm of mercury.
4. Measure the current room temperature in °C.
5. Enter the temperature and pressure into the Dosimeter (if applicable).
Enter mA Limit Values Using RUT
CAUTION: The following test must be done without overheating the tube anode. Keep your exposures as short as
possible. If ANODE WARM message appears, wait before making the next test.
Note: For pre-OPIS system software, use the RUT utility CD.
1. Launch RUT, proceed as follows:
a. In the upper left-hand corner, click on Tools.
b. In the window that appears, highlight and click on Connect. When the Login Succeeded Window appears, click OK.
c. In the Left-hand Window, click on Ma Limit Editor. When the UPLOAD and SAVE Window appears, point and click on
No.
2. When the mA Limit File Editor window appears, select Fluoro mode.
3. Select Manual Fluoro mode and Normal magnification. Select 40 kVp @ 10 mA. During a fluoro exposure, increase kVp
until the Dosimeter reading is close to but not over the maximum corrected exposure rate of 9.26 R/minute. This is the
breakpoint.
21
Service
Periodic Maintenance
Contents
Schematics
Illustrated Parts
Installation
To Next Page
Loading...
