Greetings all,,
The ASU (amplitude setting unit) in our 12yr old Bruker dbx went fritzy
last week: The, usually constant, output voltage varied from 55mV to 880mV,
sporadically jumping from low to high voltage and back in ~15-40 minute
intervals, with as much as 100mV variability shot-to-shot. The Bruker
service tech suggested pulling and reseating the ASU board. This has not
only fixed the trouble, it has nearly doubled the input voltage to my rf
amplifier.
Has anyone in spinland seen this type of behavior from a similarly aged ASU
board?
What is considered 'correct' voltage of the ASU output?
What is the acceptable shot-to-shot variability of ASU output voltage?
If this issue comes back, does the reseating of the ASU continue solve the
problem?
Have I really fixed the problem or would it be wise to spend the $$ on the
replacement from Bruker?
What type annual 'bang-thump-pull' routine is recommended to keep the dbx
fully operational?
Thank you all,
Benjamin
--
Benjamin Kohn
Research Associate II
Department of Chemical & Biological Engineering
Colorado State University
Fort Collins, CO 80523-1370
Cell: (216) 392-9049
Benjamin.Kohn_at_colostate.edu
Received on Tue Mar 26 2013 - 07:49:11 MST