Hi Walt,
Sounds like you busted it good ...
Seriously, though, there are several things that could cause this. Here are
a few in no particular order:
If the VT gasflow is a bit too high and sample spinning is turned on, it can
lift the sample enough that “sample down” signal is lost
and the sample changer thinks the emergency lift is on.
If the sensor at the bottom of the BST (the upper section of the shim stack
is getting dirty, the SampleXpress could think that the sample is lifting and
throw that error message. Based on the age of the system and the fact you've
got a sample changer, I would probably check this first. Depending on how well
people clean their samples, dirt tends to build up. Some people have had success
using a long wooden dowel and some sort of wipe to fashion a giant swab to
clean out the shim system. If you want good in structions for this, I'd get
in touch with Bruker Center (center_at_bruker.com<mailto:center_at_bruker.com>).
It could be a faulty SPB. Sometimes the valves in these fail in interesting
ways and instead of smoothly regulating the VT gasflow you get random spikes.
Which could result in the sample lifting enough to cause the emergency eject
error. This might also be caused by some sort of intermittent leak - it's
probably not a bad idea to go over the VT gas connections to make sure there
are no leaks and that the tubing hasn't become brittle.
There's a short cable that connects the samplexpress to the shim system. That
could be failing, but I think that's the least likely alternative. You could
always disconnect it and reconnect it.
Cheers,
Mike
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Received on Fri Jul 14 2023 - 08:24:41 MST