Difference between revisions of "For the second coil"
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** remove jumper box and cables and bring to F117 for rework - done | ** remove jumper box and cables and bring to F117 for rework - done | ||
** remove current-limiting resistor boxes, bring to F117 for rework - done | ** remove current-limiting resistor boxes, bring to F117 for rework - done | ||
− | ** minimize summed coil voltage readouts, do most sums in PLC | + | ** minimize summed coil voltage readouts, do most sums in PLC - done |
− | ** add separate readouts of splice and vapor-cooled lead voltages | + | ** add separate readouts of splice and vapor-cooled lead voltages - done |
** combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller | ** combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller | ||
− | ** match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors | + | ** match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors - done |
− | ** read out voltage taps for quench detection and DAQ using separate resistor chain | + | ** read out voltage taps for quench detection and DAQ using separate resistor chain - done |
** update wiring diagrams to "as built" | ** update wiring diagrams to "as built" | ||
** get diagrams and spec sheets to Fernando - done | ** get diagrams and spec sheets to Fernando - done | ||
Line 15: | Line 15: | ||
* Danfysik power supply | * Danfysik power supply | ||
− | ** understand ramp-down mechanism | + | ** understand ramp-down mechanism - done |
** measure fast dump resistors in power supply - done | ** measure fast dump resistors in power supply - done | ||
** eliminate 2V DC offset | ** eliminate 2V DC offset | ||
− | ** fix slow dump | + | ** fix slow dump |
** make more copies of full Danfysik power supply manual (get from Steve L) | ** make more copies of full Danfysik power supply manual (get from Steve L) | ||
* Danfysik quench detector | * Danfysik quench detector | ||
− | ** match and balance resistors | + | ** match and balance resistors - done |
− | ** install test points for gain/offset tuning | + | ** install test points for gain/offset tuning - done |
** install pots for balance | ** install pots for balance | ||
** install bias circuit if unable to eliminate Danfysik DC offset | ** install bias circuit if unable to eliminate Danfysik DC offset | ||
+ | *** review needed? | ||
* Dataforth system | * Dataforth system | ||
− | ** | + | ** Correct for 2M Ohm internal impedance and 200k Ohm resistors in voltage tap readouts |
* USB device | * USB device | ||
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** HMI development machine and license | ** HMI development machine and license | ||
** contact A-B salesman about licenses | ** contact A-B salesman about licenses | ||
− | ** change HMI database to MySql | + | ** change HMI database to MySql - done |
*** more pre-defined trend plots | *** more pre-defined trend plots | ||
** more HMI screens (may need license upgrade) | ** more HMI screens (may need license upgrade) |
Revision as of 10:25, 27 January 2011
To-do list
- Wiring
- remove jumper box and cables and bring to F117 for rework - done
- remove current-limiting resistor boxes, bring to F117 for rework - done
- minimize summed coil voltage readouts, do most sums in PLC - done
- add separate readouts of splice and vapor-cooled lead voltages - done
- combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller
- match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors - done
- read out voltage taps for quench detection and DAQ using separate resistor chain - done
- update wiring diagrams to "as built"
- get diagrams and spec sheets to Fernando - done
- understand signal clipping and interaction between readout modules, test and replace if necessary
- minimize noise
- Danfysik power supply
- understand ramp-down mechanism - done
- measure fast dump resistors in power supply - done
- eliminate 2V DC offset
- fix slow dump
- make more copies of full Danfysik power supply manual (get from Steve L)
- Danfysik quench detector
- match and balance resistors - done
- install test points for gain/offset tuning - done
- install pots for balance
- install bias circuit if unable to eliminate Danfysik DC offset
- review needed?
- Dataforth system
- Correct for 2M Ohm internal impedance and 200k Ohm resistors in voltage tap readouts
- USB device
- install voltage dividers to extend voltage range
- add resistors to Zener protection circuit
- automated elog entries
- A-B HMI improvements
- additional HMI license, get second computer working
- dual-redundant HMI server or another machine for the server
- HMI development machine and license
- contact A-B salesman about licenses
- change HMI database to MySql - done
- more pre-defined trend plots
- more HMI screens (may need license upgrade)
- simplify existing screens
- better indication of what caused fast/slow dump
- A-B PLC program improvements
- new channels
- simplify many operations
- improve PLC early problem detection
- improve PLC cryo control under varying CTF operating conditions
- implement early-warning quench/overvoltage detection in PLC
- EPICS
- serve out all PLC channels to CA
- need list from Josh
- implement guard shack notification for IOC crash
- serve out all PLC channels to CA
- improve cryo system
- minimize ice buildup
- more heating/insulation on N2 vent line
- can we calibrate the C-glass sensors somehow?
For the hall
- UPS on Danfysik boards and contactor
- may implement active isolation depending on test results
- max ramp rate in the hall is 10V / 20H = 0.5 A/sec
- do we need additional valves, check valves, bypasses, whatever?
- do we need Dataforth voltage attenuators on coil tap channels?
Basic questions
- what is causing blockage in vapor-cooled lead?
- broken valve!
- lag between field and current...are there turn-to-turn shorts in coil 1?
- maybe short, maybe eddy currents
- what worked, what didn't for coil 1?
- what should we do differently for the next coil?
- will we open up coils 3 and 4?
- what might we consider doing differently in the hall?
- do we want an independent review of our fast (and slow) dump strategy and system?
- have we documented our experience?
- sub-coil inductances
- measure with inductance meter on the platform
- inductance seen on splices