User`s guide

Most Often Asked Questions
by which time the beam might already have hardened the film.
That fact can be used to diagnose the presence of oil if the user
takes an image at a low kV periodically to check for the presence
of oil.
Examine the surface of the scintillator.
If the surface of the scintillator becomes dirty or scratched, ship the
camera to Gatan for service. Do not attempt to clean the scintillator
yourself as damage can result.
5.1.3 Fan Filter
The controller’s fan filter (see Figure A7 in Appendix 1) needs to be washed
every six months.
To clean the filter:
• Remove the plastic filter frame located on the back panel of the
controller.
• Remove the filter materiel from the frame.
• Rinse the filter in warm water and pat dry between paper towels.
• Insert the filter materiel into the frame and reinstall.
5.2 Most Often Asked Questions
The following are some of the questions most frequently asked by camera
users. If you are having a problem with your camera, check and see if the tips
listed below are helpful.
1.
2.
Why does the US4000 camera saturate far below the 64,000
value (16-bit dynamic range) in 1x binning mode?
For US4000 camera, the saturation of 2x binning readout is set to 16-bit,
i.e. 64,000 value. The higher resolution 1x binning readout mode does not
make full use of the full range of the output amplifier because of the
smaller pixel size. The US4000 saturates at roughly 1/3 of the full
digitization range by intent.
There is no image on the CCD, what should I do?
Check if the cable from the UltraScan controller to the camera is properly
connected. Make sure the power is off when plugging cables in.
UltraScan User’s Guide Reference Series Rev 1.0 5-4