<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Hello Probir,</div><div><br data-mce-bogus="1"></div><div>PLC program has not been changed since the last test that we performed. Program is set to handle injected current in the coils as 1 [A], since we are not considering dump resistor values (Idump = 0 A) for this test.</div><div>Once the current will be injected (1 A), we should be able to readout the 'estimate temperature' in the 5 coils without any problem.<br></div><div><br data-mce-bogus="1"></div><div>Best Regards,</div><div>Pablo </div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"Probir Ghoshal" <ghoshal@jlab.org><br><b>To: </b>"Ruben Fair" <rfair@jlab.org><br><b>Cc: </b>"Renuka Rajput-Ghoshal" <renuka@jlab.org>, "John Hogan" <hogan@jlab.org>, "Dave Kashy" <kashy@jlab.org>, "Nicholas Sandoval" <sandoval@jlab.org>, "Scot Spiegel" <spiegel@jlab.org>, "Pablo Campero Rojas" <campero@jlab.org>, "Brian Eng" <beng@jlab.org><br><b>Sent: </b>Thursday, August 17, 2017 9:36:30 AM<br><b>Subject: </b>hall sensors and current direction/field direction<br></div><br><div data-marker="__QUOTED_TEXT__">Ruben,<br><br>All hall sensors read correctly, when checked (Ruben have screen shots remotely in EPICS).<br>Also connected the bench top PSU and charged with 1A.<br>The changes observed with increasing the current from 1 A to 5A, all follows nicely as expected.<br><br>The conclusion - <br>1. Lead A connected negative and B positive as in the drawing.<br>2. All hall sensors read as expected with the excitation current direction set.<br>3. The NORTH pole with the setup in point #1 is towards the torus (along the beam direction or towards DS).<br><br>Nothing to change from set up perspective, but if physicists needs to change the direction that shall be carried out in the MPS (reversal switch for polarity). <br><br>Dave/Pablo - Scot is presently working on the SST will be done in another hour. After that will be possible to read the coil/voltages thus coil temp (Pablo hope the program with 1A current set has not been changed)<br><br>regards<br><br>Probir<br></div></div></body></html>