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Chapter E - C-ARM AND IMAGING ARM

ProMax X-ray unit with Dimax3 E-83

OTHER ADJUSTMENTS AND CALIBRATIONS

Technical Manual

When the exposure cycle is completed the text Complete is shown on the

Panoramic DEC

display.

Figure 128

NOTE The reference value is recommended to be between 150-500.

If the reference value is greater than 500, decrease the mA value and if the reference value

is smaller than 150, increase the mA value. Then perform the OD exposure again.

NOTE The altered exposure value (mA) is not automatically updated to the exposure value

setting on the Main menu.

NOTE If the value is near zero, the panoramic 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

Panoramic 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 normal+average jaw size.

1) First exposure: Use the OD xposure 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 panoramic beam alignment (position and width) according to the instructions

given in section 1.2 “Checking the panoramic beam position” on page E-4.

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.

Planmeca ProMax X-ray User Manual

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