[Dsg-hallb_magnets] Torus Pre-Power up checks

[Ruben Fair]

Excellent work Pablo.

Thank you so much

Regards

Ruben

> On Nov 14, 2017, at 5:30 PM, Pablo Campero <campero at jlab.org> wrote:
> 
> Hello Ruben,
> 
> Torus Pre-Power Up checkouts were completed this afternoon. Abbreviated checkout procedure which has about 18 task was completed.    
> Probir and Scot did the interlock testing for the QD units.
> Overall all interlocks worked properly except for the UPS battery low interlock.
> 
> 
> During the process of testing the UPS battery interlock, it was found faulty battery on the Torus UPS located on controls racks at 2nd level space frame, the fault arise when a  "Battery low'' signal come up intermediately (20 sec) on the PLC after disconnection of the UPS from the clean power outlet.
> "Battery low" signal is supposed to be alerted and sent to the PLC after ~ 26 min which is an average time for the UPS to get discharged depending on the load connected and the configurations (% charge in battery) set on the UPS power supply.
> Scot replaced it with the spare available and then we did a full test to ensure its proper functions, as follows:
>  1. Disconnected UPS from utility power which is part of generator circuit.
>  2.Verified that analog signal was sent to the make the PLC aware of the loss of power (PLC on battery).
>  3. Registred UPS time available on UPS display. This is the time before battery get fully discharged  (26 min)
>  4. Wait 25 min and verified that second analog signal (Battery low) was sent to the PLC, just 1 min before power control went down.
>  5. Re-connected UPS to utility power
>  6. Verified that UPS bypasses  power and goes to online (generator circuit) to keep control system power alive.
>  7. Checked that battery in the UPS started charging after its power connection.
> 
> 
> Best Regards,
> Pablo
> 
> 
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