Most Often Asked Questions
UltraScan Use
r
’s Guide Reference Series Rev 1.0
5-4
•
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.
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.
2.
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.
Check if the shutter cables are properly connected.
Run the Set Bias routine.
Check the “Camera View” floating window to see if the “Camera Inserted”
box is checked (camera inserted).
Check if the Shutter switch on the UltraScan controller is set to AUTO.
Check if the beam has drifted.
Check if the TEM viewing screen is lifted.
Check if you have a film plate stuck above the camera in the TEM.
You may have an image and not being able to see it. Move the pointer
around to get an idea of the counts. If the value is over 4,000 counts (in 1x
