De-Energized magnet using three supplies set as follows:
Supply 1 and 2 applied thru the 10-way connector on the neck tube.
Supply 3 applied thru the shim stick.
Main heater would not open when it was in parallel with RPS, so moved the RPS to the supply with Z0. All shim currents set to about 120 mA. Also dumped each radial shim that was above 5A before I started.
Filled three NMR magnets using 100L dewer. Magnet Start End Total Oxford 500 28% 100% 72% 95L 45L 50L 8:20 8:40 20 mins Oxford 300 Unknown 100% NA 45L 10L 35L 8:50 9:05 15 mins Bruker 500 81% 91% 10% 10L 0L 10L 9:15 9:20 5 mins
Probe HCN_0775_sem HCN_3512_sem Shims HCN_0775_sem_lk_d20 HCN_3512_sem_lk_d2o h1pw90 7.8us @ 52 7.5us @ 51 lshp_ns 0.74/8.59/10.6 0.60/5.18/8.09 lshp 0.33/2.73/4.92 0.30/1.89/2.09 h1sn 702:1 877:1 f19pw90 9us @ 52 — f19sn 109:1 — c13pwx 14.8us @ 60 24.7us @ 60 c13gamah2 8065 @ 43 8065 @ 48 n15pwx 33us @ 60 — gzprofile 32.8 G/cm 62.8 G/cm gzrecovery…
Mercury 400 Alarm Found that the PS204, which is a +12VDC and +5VDC power supply had a capacitor that was bulging. Tested the +12VDC and observed the following: When OK 12.4 VDC 0.1 VAC When Beeping 11.8 VDC 0.8 VAC At Startup 10.5 VDC 1.5V AC Ordered replacement power supply from Mouser Electronics. Part Number: HCC512-A+G…
Customer reported no 2H signal during find lock function or gradient shimming. Other issues, AMT had bad fan and the console main switch would not stay on. Replaced fans in AMT Replaced main power switch Tested system RF When testing RF found that output of AMT had good power out for H1 but the RF…
nstalled DOTY HX probe. Lineshape was marginal, as was S/N. Had to install sample from below like a solids probe. Was unable to get it to work with the upper barrel and sample eject because the probe is longer and has too much air leakage. See message below sent to DOTY. Judy, I was assisting…
Checked Advance III HD RF output on H1. At PLW1 of 100 dBm Watts SGU2 Out 1.33 dBm 1.4 mw BLA Out 51.78 dBm 150.6 w QNP Out 51.33 dBm 135.8 w HPPR In 49.48 dBm 88.7 w Probe In 49.24 dBm 83.9 w PLW1 at BLA Out dBm Watts 10 41.75 dBm 14.9 w…