Planmeca Proline EC ceph, Техническое руководство

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Chapter D - ADJUSTMENT & CALIBRATION
D-30 Planmeca Proline EC X-ray unit
AUTOMATIC EXPOSURE CONTROL (AEC) CALIBRATION
Technical Manual
Press the return key to drive the cassette to the loading position, remove the cassette and
process the film.
Compare the film to the reference film: the film must be as dark as the reference film. Repeat
the procedure with different mA values until the correct film density is achieved, and then
select the density value that gives the right mA value as follows.
Enter the service mode: press the CTL-key and simultaneously press and hold down the hid-
den key (to the right of the panoramic mode selection key) until the temperature of the tube-
head appears on the display (about four seconds). The ready key indicator light will start to
flash. This indicates that you have entered the service mode.
To change the density value enter the film density adjustment mode by pressing the control
key and then press the pan key until the density value, indicated with “d”, is shown on the
main display. Change the value with the height adjusting keys.
Select the density value that corresponds the mA value, e.g. if the mA value is 7mA, select
the density value -1.
Exit the film density adjustment mode by pressing the ready key.
+
Hidden
key
CTL
CTL PAN
d -1
READY
PRET