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Problem
ChemiDoc XRS image will
not Auto expose
Unable to focus on the
sample using White Light
Transilluminator or
conversion screen
Possible Cause
• The sample is too
bright and saturates
the image at the
minimum possible
exposure
• Aperture is open too
wide causing a
shallow depth of field
Page 30 of 42
Solution
• Close the IRIS using the
IRIS control until Auto
expose is possible.
• Close the Iris slightly
and then focus again.
Keep repeating until
good focus is achieved
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