Preva Installation/Service Manual, 00-02-1577, Revision E01
69
Changing Pre-programmed Exposure Settings
The Preva Dental X-ray System allows the operator to increase or decrease
image density for all presets for a receptor simultaneously or to change each
of the technique factors for a preset individually. The factory default settings
can also be restored. For charts of the factory default settings, refer to
Factory Default Exposure Settings on page 111 in the Preva User manual.
Note: If the 12” [30 cm] cone is going to be used, configure the Preva for
use with the 12” cone before changing preprogrammed exposure
settings. Configuring the Preva for use with the 12” cone will reset
exposure settings to the default settings used with the 12” cone.
Change Presets
Menu
1. From the Main System Configuration menu, Figure 49, select CHANGE
PRESETS. The the Preset Options menu shown in Figure 51 will be
displayed.
2. Selecting EXIT returns the display to the Main System Configuration
menu.
Receptor
Settings Globally
1. Select ALTER DENSITIES from the Preset Options menu. The first Image
Receptor Type illuminates. The display shows the selected Image
Receptor Type and current density.
2. Using the Image Receptor Type button, select the image receptor to
adjust.
3. Use the up and down arrow buttons to specify a percentage by which
densities will be increased or decreased for the selected receptor.
Densities can be increased in steps of 25% and decreased in steps of
20%.
4. Press the right arrow to save the settings.
to Digital
Sensors
2. Press the Tooth Selection and Patient Size Selection buttons for five full
seconds.
3. Select CHANGE PRESETS from the Menu Options screen.
4. Select SELECT RECEPTOR from the Preset Options menu.
5. Press the up or down button to highlight the sensor or phosphor plate to
change, and press Enter.
6. Select YES or NO on the Verification screen.
7. Exit the Preset Options menu.
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