Planmeca ProMax X-ray Instruction Manual page 295

ADJUSTMENTS AND CALIBRATIONS
NOTE
NOTE
NOTE
Technical manual
When the exposure cycle is completed the text Complete is shown on the Panoramic DEC
display.
Figure 93
The reference value is recommended to be between 50-120.
If the reference value is greater than 120, decrease the mA value and if the reference value
is smaller than 120, increase the mA value. Then perform the OD exposure again.
The altered exposure value (mA) is not automatically updated to the exposure value
setting on the Main menu.
If the value is near zero, the cephalometric beam must be re-aligned and if the value is
thousands, the AEC/DEC calibration tool does not properly cover the primary collima-
tor opening.
To accept the DEC parameters touch the Done field on the Cephalometric DEC display and
Exit field on the DEC calibration display.
Take three test exposures from the AEC/DEC calibration tool as follows. Enter to the Main
display. Switch on the DEC function and select lateral exposure. Select high speed feature.
1) First exposure: Use the OD exposure mA and kV values. Take an exposure. Check in
the Main display that the kV and mA values are not changed during the exposure.
2) Second exposure: Increase mA value by 4mA from the original value. Take an
exposure and after the exposure check in the Main display that the kV and mA values
have been decreased.
3) Third exposure: reduce mA value by 4mA from the original value. Take an exposure
and after the exposure check in the Main display that the kV and mA values have been
increased.
If the kV and mA values are not correctly adjusted during the exposure, perform the fol-
lowing checks:
1) Make sure that the DEC function is ON.
2) Check the cephalometric beam alignment (position and width) according to the
instructions given in section 1 "ADJUSTMENTS AND CALIBRATIONS" on page H-1.
3) Check that the AEC/DEC calibration tool covers the primary collimator opening.
After the checks perform the DEC calibration again. Remove the AEC/DEC calibration tool
and attach the removed covers.
Chapter H - CEPHALOSTAT
ProMax X-ray unit with Dimax3 H-51