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.
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…
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…
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…
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.
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…
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…