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IDProjectCategoryView StatusDate SubmittedLast Update
0000161Hall D OnlineControlspublic2011-10-31 14:532012-04-04 15:04
Assigned Towolin 
PlatformOSOS Version
Summary0000161: Develop scheme to isolate signals from the solenoid magnet coil taps
DescriptionDuring the test we saw noise, cross-talk and baseline shifts on the coil tap voltage channels. We need to design an isolation scheme that simultaneously satisfies our need for precision, speed and voltage range for the fast and slow DAQ systems and the quench detector.
Additional InformationIdeal would be to use a single isolation amplifier per tap on the platform close to the taps.
TagsNo tags attached.
Work by outside group for Hall DNo
Estimated man-weeks4
Percentage complete0
Actual man-weeks0
Attached Files

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-  Notes
wolin (administrator)
2012-01-19 14:42

With luck the National Instruments CRio or PXI systems will solve all our problems, Yi is investigating and getting prices.
wolin (administrator)
2012-01-27 10:00

PXI looks like the best choice, and Labview RT isn't too expensive. With PXI we won't need Labview FPGA. We seem set on licenses at the moment. Yi is still optimizing the hardware configuration and getting prices. Should have a final configuration next week.
wolin (administrator)
2012-04-04 15:04

After research by Yi we have settled on the National Instruments PXI system for both the fast and slow daq systems. All coil taps and fast daq channels will be connected to the PXI device. Direct connections from these channels to the PLC will be eliminated. Josh and Yi were able to get the PLC to read PXI channel values.

- Issue History
Date Modified Username Field Change
2011-10-31 14:53 wolin New Issue
2011-10-31 14:53 wolin Work by outside group for Hall D => No
2011-10-31 14:53 wolin Estimated man-weeks => 4
2011-10-31 14:53 wolin Percentage complete => 0
2011-10-31 14:53 wolin Actual man-weeks => 0
2011-10-31 14:54 wolin Status new => assigned
2011-10-31 14:54 wolin Assigned To => dickover
2012-01-19 14:42 wolin Assigned To dickover => wolin
2012-01-19 14:42 wolin Note Added: 0000242
2012-01-19 14:42 wolin Status assigned => acknowledged
2012-01-27 10:00 wolin Note Added: 0000256
2012-04-04 15:04 wolin Note Added: 0000332
2012-04-04 15:04 wolin Status acknowledged => resolved
2012-04-04 15:04 wolin Resolution open => fixed

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