Checking System Functions
Preva
52
System Function Checklist
Wall Mounting
Ensure that the wall support is adequate and that the system is properly
mounted to the wall.
Labels
Ensure that all certified components bear labels that include the model
and serial number, date of manufacture, and a statement of certification
as noted elsewhere in this manual.
Tubehead
Check for oil leaks or other evidence that could indicate internal damage.
Replace the Tubehead, if necessary.
Tubehead
Rotation
Ensure that the Tubehead maintains its position around the horizontal
axis while remaining easy to rotate and position. Also check the vertical
pivot of the Tubehead for easy movement while remaining in position
after moving.
Suspension
Check that all movements are smooth and quiet. Verify that the
Tubehead is properly counterbalanced for vertical drift and that the
Horizontal and Articulating Arms do not drift horizontally.
Power Switch
Verify that the switch is working properly and that the Ready Indicator is
illuminated when the power switch is in the ON position.
Operator Panel
Controls
With the power switch, located at the upper right of the Control Unit, in
the ON position, verify that technique factors appear on the Operator
Panel. Also, check the function of the selection buttons for Tooth
Selection, Image Receptor Type and Patient Size. Pressing a selection
button should cause indicator lamps to indicate the selected item.
Exposure Button
Verify that the Exposure button on the Operator Panel is functioning
properly. To make an exposure, press and hold the Exposure button until
the Radiation Indicator is extinguished and the audible signal is no longer
heard.
Exposure
Indicators
Make several exposures and verify that the Radiation Indicator
illuminates and the audible signal is heard.
Premature
Termination
Select the longest exposure time possible using the up and down arrows.
Initiate an exposure but release the Exposure button after a brief period
of time before the timer terminates the exposure. Verify that the display
indicates “Pre-termination Error” and returns to normal operating mode.
Coil-cord Hand
Switch Option
If a coil-cord hand switch is used, inspect the switch housing and coil
cord for damage or wear. Replace if evidence of damage is present.
User Information
Make certain that the user of the system has received the User Manual.
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