Checking System Functions Preva
13
System Function Checklist
9
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.
