OEC 9800 Periodic Maintenance Procedure
50
Note:
If the number of collimator leaves selected is 2 then the Calculate Constants command button on the Dose
Area Product Calibration form will be grayed out and unavailable.
1.
Calculate coefficients prior to performing this procedure.
2.
Remove the DAP Paddle Holder's retaining ring, insert the ion chamber and then reinstall the retaining ring.
3.
Attach the DAP Paddle Holder to the Collimator cover. The DAP Paddle Holder attaches to the round circular
portion of the collimator cover.
COLLIMATOR
COVER
DAP PADDLE
HOLDER
ION CHAMBER
(PADDLE)
RETAINING
RING
Figure 9. DAP Paddle Holder to the Collimator cover
4.
Drive the collimator leaf to the 0° position and verify the position using the external monitor.
5.
Open the collimator iris completely and close the leaves completely.
6.
Select Manual Fluoro mode and a technique of 80 kVp @ 3.0 mA.
