[AMMRL] SampleCase loading errors

From: Roberts, Jessica <jroberts_at_ohio.edu>
Date: Wed, 26 Jul 2023 18:54:19 +0000

Hello everyone!

I have currently been having issues while using the SampleCase autosampler
on my 500 MHz Ascend instrument. There are two major issues that arise:

1. SampleCase fails to load a sample into the magnet. Autosampler will retrieve
the sample, send it up and across and down into the magnet. After a few seconds,
the sample will be ejected (often times by a sound that seems alot like building
pressure in an air line). The sample will then sit with the lift on for a few
seconds before repeating the process. After a few failed attempts the sample
will error out on IconNMR.

2. There is a less frequent issue but I will include it in case it is relevant.
I have seen the SampleCase retrieve a sample from the carousel, lift it to the
top track where it remains momentarily, then it will be sent back down to the
carousel. This typically times out after a few repeatedly failing attempts.

A few notes I will say:

-I am located at Ohio University where it has been quite humid as of late.
My air dryer does not have an autoswitch but I have powered it on today and
intend to run it for a few days to see if it improves things.

-Initial issues were only observed with one ceramic spinner, so I thought it
might be a problem with the old reflective tape. Now it can occur with a spinner
that worked for the previous experiment. In the most recent instance, the loading
error did not occur for a standard proton but for the immediately following
standard proton with rotation.

-It sometimes seems sporadic. A user can submit samples without issues while
another will have problems and it is hard to reproduce as I try to troubleshoot.

-I have not yet had issues with manual sample loading using lift on/off on
BSMS module so I suspect it is autosampler related.

Thanks everyone!
Jessica



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Received on Wed Jul 26 2023 - 11:59:01 MST

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