<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Thank you Brian.<br></div><div><br data-mce-bogus="1"></div><div>I shall incorporate these guidelines into the ramp up/down procedure that I am presently modifying for the solenoid.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Cheers<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Ruben<br data-mce-bogus="1"></div><div><br></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"Brian Eng" <beng@jlab.org><br><b>To: </b>"dsg-hallb magnets" <dsg-hallb_magnets@jlab.org><br><b>Sent: </b>Tuesday, September 26, 2017 4:22:31 PM<br><b>Subject: </b>[Dsg-hallb_magnets] Solenoid Polarity Reversal<br></div><div><br></div><div data-marker="__QUOTED_TEXT__">Ruben,<br><br>Attached are the timestamped notes that I took when Pablo and I were testing the solenoid earlier today in the window Bob had between CND installation.<br><br>End result: if you wait long enough (I think at least 5 minutes should be okay [~2 minutes worked once, but tripped the other time]) after the MPS has ramped to "zero" and then turn the MPS off you can switch the polarity without any fast dumps.<br><br>Also, unexpectedly, switching the polarity when the MPS is off will clear any QD faults remotely.<br><br>--<br>Brian Eng<br>Detector Support Group<br>757-269-6018<br><br><br>_______________________________________________<br>Dsg-hallb_magnets mailing list<br>Dsg-hallb_magnets@jlab.org<br>https://mailman.jlab.org/mailman/listinfo/dsg-hallb_magnets<br></div></div></body></html>