Difference between revisions of "For the third coil"
From GlueXWiki
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| Line 3: | Line 3: | ||
* Wiring | * Wiring | ||
| − | + | ** eliminiate pickup on downstream lead/splice and other channels (esp. during dump) | |
| − | ** eliminiate pickup on downstream lead/splice (esp. during dump) | + | |
** understand induced voltages on taps during testing | ** understand induced voltages on taps during testing | ||
** switch to 20k protection resistors for coil taps? | ** switch to 20k protection resistors for coil taps? | ||
| + | ** understand noise, signal clipping and interaction between modules | ||
| Line 13: | Line 13: | ||
** commission fault sequencer | ** commission fault sequencer | ||
** understand ramp-down mechanism | ** understand ramp-down mechanism | ||
| − | ** understand varying fast dump time | + | ** understand varying fast dump time constant |
** fix slow dump | ** fix slow dump | ||
** choose ground fault detection compatible with quench detector | ** choose ground fault detection compatible with quench detector | ||
| Line 27: | Line 27: | ||
** implement system to isolate fault detectors and determine time sequence of trips | ** implement system to isolate fault detectors and determine time sequence of trips | ||
** understand spikes on shunt Newport | ** understand spikes on shunt Newport | ||
| − | ** understand effect of B field on all sensors | + | ** understand effect of B field on all sensors, move devices if needed |
** monitor circuit breakers? | ** monitor circuit breakers? | ||
| Line 61: | Line 61: | ||
* should we monitor all circuit breakers? | * should we monitor all circuit breakers? | ||
* should we monitor all relays? | * should we monitor all relays? | ||
| − | * effect of B field on sensors/relays? | + | * what is the effect of B field on sensors/relays? should some instrumentation be relocated? |
Revision as of 11:02, 10 March 2011
To-do list
- Wiring
- eliminiate pickup on downstream lead/splice and other channels (esp. during dump)
- understand induced voltages on taps during testing
- switch to 20k protection resistors for coil taps?
- understand noise, signal clipping and interaction between modules
- Danfysik power supply
- fix broken transistor
- commission fault sequencer
- understand ramp-down mechanism
- understand varying fast dump time constant
- fix slow dump
- choose ground fault detection compatible with quench detector
- Danfysik quench detector
- implement divider circuit upstream of QD to eliminate effects of coil imbalances
- Instrumentation
- ensure all devices on clean power
- check out Newport controllers, flow switch
- implement system to isolate fault detectors and determine time sequence of trips
- understand spikes on shunt Newport
- understand effect of B field on all sensors, move devices if needed
- monitor circuit breakers?
- NI USB device
- rework Zener/divider box, needs to be fully bipolar
- eliminate noise
- A-B HMI improvements
- upgrade to 100 screen license
- implement fault sequence screens
- A-B PLC program improvements
- use custom ("add-on") instructions to simplify code
- EPICS
- EWEB screens
- update for latest tags and drawings
For the hall
- note that max ramp rate in the hall is approximately 10V / 20H = 0.5 A/sec
- should we install a UPS on the Danfysik contactor and control boards?
- do we need additional valves, check valves, bypasses, whatever?
- do we need Dataforth voltage attenuators on coil tap channels?
- do we need active isolation of coil tap channels, etc?
- should we monitor all circuit breakers?
- should we monitor all relays?
- what is the effect of B field on sensors/relays? should some instrumentation be relocated?
