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.
System had several issues including bad Digital PS, inconsistent shims and intermittent RF output. Believe the shim issues were due to bad digital PS. Still having intermittent RF issues. Also, the CPU board was bricked. I was able to restore it to defaults using procedure below. Attach a terminal connection to the Acq CPU Diag…
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…
Completed Install of SMS Robot and SYS-V Controller. Customer had table, cables and interface cards. Vertical Reach Rotation CP1:AT.HAND.GP 1.8 30.3 89.9 CP1:CLEAR.HAND.GP 24.8 0.0 89.9 HAND.GP 16.2 19.9 89.8 CP31:RACK P1 19.5 4.7 76.3 CP31:RACK P2 19.5 4.6 43.2 CP31:RACK P3 19.5 27.2 49.3 CP191:MAGNET 19.3 21.9 272.0 CP191:CLEAR 34.0 0.0 272.0
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…
Water Damage NMR had a failure with the air dryer system that caused water to enter the airlines of system all the way thru the shim coil. Had to replace the following: All system air solenoids Shim Coil Also had to clean the upper barrel for proper spinning. Shim Coil was replaced with an Oxford…
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…