APX 525/625 Generator Revision C Operating Manual
©
2005 Del Medical Imaging Corporation
7/5/2005 Page 13
To modify any of these factors, press the multi-function button closest to the name of
that factor. If the function is kV, mAs, or exposure TIME, you can then change the
displayed value with the rotational knob. For FOCAL SPOT or IMAGE RECEPTOR,
press the associated button to toggle through the available selections. You can
modify any factor by pressing its multi-function button and continuing as above. (For
exposure procedures see Prep and Expose.)
AEC MODE
The Universal Automatic Exposure Control, if installed, can be activated by pressing
the <AEC> mode button.
When you select AEC, the following parameters are not displayed:
• Pre-determined exposure time
• mAs
They are replaced by:
• Film / Screen Selection
• Ion Chamber Fields
• Film Density
• Back-up mAs (or Time)
• kV
Pre-programmed kV and Back-up mAs values will be displayed. The mAs value
must be set by the operator, using the rotational knob, and it should be about 2 to 3
times the expected mAs for the selected kV. Any technique parameter may be
individually changed in the same manner as described previously.
You can access the various chamber field combinations by toggling the
multi-function button adjacent to the field display on the screen.
Film Screen Select gives you a choice of two different film-screen combinations.
The film-screen speeds may vary by site and are calibrated to the technologist's
preference during the installation. The other film-screen is select by pressing the
associated multi-function button.
Density refers to the optical density on the finished radiograph. You can select
changes in density, ranging from minus 50% to plus 50%, by pressing the
associated multi- function button and turning the knob to select the desired density.
(For exposure procedures see Prep and Expose.) Once the exposure is complete,
the display will indicate the actual mAs and elapsed time of the exposure.
To Next Page
Loading...