| 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 | < 1ms | < 1ms |
All shims, probe files and gradient maps saved under /home/vnmr1/vnmrs/ and /vnmr/.
Filled three NMR magnets using 100L dewer (filled with only 70L). Magnet Start End Total Oxford 500 34% 100% 66% 72L 40L 32L 10:10 10:35 25 mins Oxford 300 Unknown 100% NA 40L 25L 15L 10:45 10:55 10 mins Bruker 500 80% 100% 20% 25L 0L 25L 11:00 11:15 15 mins
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…
Lineshape does not meet spec. Needs 3D Gradient shimming. Found that the upper barrel was not centered in magnet field. Re-centered upper barrel. Performed 3D gradient shimming successfully. Obtained lineshape spec after RT shimming. Performed H1 and C13 performance specs, all passed. Default shims and power level vales saved. New gradient map saved.
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…
Customer reported that they could not lock (using 2H) or gradient shim. Looked at 2H RF path and good signal coming out of console to probe. Problem must be on receive side. Swapped the following parts for troubleshooting: 2H Diplexer Lock Preamp 2H RF Relay (verified operation) 2H Filter (bypassed) Believe issue is the Mixer…
De-Energize and Pack De-energized and packed system for shipment to Canada. System was de-energized and warmed up and then packed into Oxford shipping crate (including sides). Four pieces were shipped to IET for final crating and packing. Customer arranged for pickup by a freight carrier. Found the following issued during benchmark; Remote Status box inop…