User`s manual

Alpha Innotech User’s Manual, version 4
1-15
• Under Exposure for chemilumenescence
• Over Exposure for faint band detection.
• Custom Exposure Compensation: user definable Exposure Value (EV).
The up/down arrows allow the user to change the EV value by whole units (left up/down
arrows) or by 1/8
th
(right up/down arrows).
Auto Exposure works in both “Expose Preview” and “Acquire Image” modes. As the
software calculates the correct exposure time you will see the status bar change from red
to yellow and then to green. When it reaches green the software has achieved the correct
exposure time. If the bar turns pink, this is an indication that there is saturated pixels in
the image area at the exposure time calculated.
In Acquire Image mode the image will be acquired when the bar turns green. In Expose
Preview mode the software will continue exposing over and over at that exposure time
until a different mode is selected. If “Acquire Image” is selected after the software has
achieved the correct exposure time in Expose Preview the software will begin acquiring
at the last exposure time calculated in Expose Preview—it does not start the calculation
over from scratch.