Universal APX 525 - Mode Selection

APX 525/625 Generator Revision C Operating Manual
© 2005 Del Medical Imaging Corporation
7/5/2005 Page 10
Single Function Buttons
Button Description
2 Point /
3 Point
Pressing the button adjacent to this portion of the display will toggle
the current value between the 2 and 3 point technique modes. In 2
point mode, the operator selects only the kV and mAs of an
exposure. The mA is automatically calculated by the generator to
produce the shortest exposure possible for the selected technique,
while protecting the x-ray tube from overloads.
In the 3 point mode, the operator must select the kV, mA, and Time
of the exposure. The technique selections will be limited by the x-
ray tube overload circuit. Disallowed techniques require the
operator to manually readjust either the kV, mA, or Time of the
technique, in order to perform the exposure within the tube’s power
limit.
Display
Contrast
Pressing the button above this portion of the display will highlight
the current value. The contrast can then be adjusted with the
rotational knob.
AEC (optional)
Pressing the button adjacent to this portion of the display will
activate the AEC circuitry (if installed) and enable several button
selections that are used to control the backup mAs setting, ion
chamber selection, film density, and film/screen combinations.
Pressing the AEC button again will disable the AEC mode and
return the generator to manual exposure control. The operator must
select the backup mAs for any exposure.
PREP and
EXPOSE
To make an exposure press and hold down the <PREP> button.
When the green READY light above <PREP> displays, continue
holding down <PREP> while you press the <EXPOSE> button. The
red X-RAY light above <EXPOSE> will light up during the
exposure. When the lights go out the exposure has been taken and
you can release the two buttons.
MODE SELECTION
The APX generator operates in three basic modes:
• Manual (2 or 3 point techniques)
• APR mode (3 point techniques only)
• Optional Automatic Exposure Control (AEC) (2 or 3 point techniques)