Gentec-EO Beamage-3.0 - Manual (Page 19)

Beamage-3.0 User Manual Revision 6.0 18
4.2.3. Subtract Background Button
Figure 4-7 Subtract Background Button
Warning
To abide by ISO-11146-3:2004 (Section 3) and have an accurate
measurement, a background subtraction must be done.
Once you have clicked the “Subtract Background” button, the following message box will appear:
Figure 4-8 Subtract Background Message Box
Once this message box appears, block the beam and then click on “OK”. The software will capture 10
images and average pixel by pixel to compute the average detector background map. A “Please Wait”
message box will appear while the software is capturing the average detector background map. The
detector background map will be subtracted from all the images that will follow. Note that once the
background subtraction has been done, the exposure time will no longer be in
“Auto” mode and set to the
current exposure time.
Tip
Be sure to block your beam only when the Message Box appears and not
before.