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36 NTE/CCD Detector Manual Version 2.A
Shutter Overheating
The 25 mm remote-mounted shutter for spectroscopy has a built-in thermal interlock to
prevent overloading of its coil. If run at a high repetition rate, the shutter may heat
enough to trigger the interlock, disabling the shutter.
If your shutter suddenly stops running, stop the experiment and wait. The shutter should
resume functioning when it has cooled down sufficiently, typically within an hour. Avoid
repeating the conditions that lead to the shutter overheating, or take breaks between data
collections.
Larger shutters do not normally exhibit thermal overloading, so they do not require a
thermal interlock.