AMMRL: MAS II controller help

From: Derrick C Kaseman <dckaseman_at_ucdavis.edu>
Date: Fri, 14 Jan 2022 22:26:33 +0000

Hello AMMRL Community,
Our MAS II unit seems to have significant issues with regulating the spin speed
(+/- 50 Hz, irrespective of probe) and always has an offset of about 30 Hz from
the target spinning speed. In manual mode operation, the spinning= speed has a
constant drift to higher frequencies and then suddenly drops to lower spinning
speeds by ~100 Hz. Has anyone experienced this? Further, if anyone has or knows
someone I could contact to obtain a MAS I or II spin speed controller that
would also be a significant help.

Thank you,

Derrick

Derrick C. Kaseman
Technical Director of the NMR Facility
dckaseman_at_ucdavis.edu<mailto:dckaseman_at_ucdavis.edu>
530-752-7794
Received on Fri Jan 14 2022 - 12:26:50 MST

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