Jeff, Calum, Ben, Rich

Today we got quite a bit of the controls checked out on the Y-end ESD.  We verified the functionality of the following:

1.  All Quadrant analog drive and readback signals associated with the HV and LV ESD are working.  The readback channels for the LV ESD were verified at the channel level, but are not yet incorporated into the MEDM screens.
2.  All 15 binary control and readback channels are functional

We ran into trouble on the Bias drive channel, which we troubleshot down to the DAC card.  A new DAC card (SUS DAC 4) will have to be installed to make this functional.  We also need to finish taking the transfer functions of the installed system.  Jeff has left us specific instructions for doing that in the morning.

We had 3 or 4 trips of both HV supplies while we were working, leading us to be suspicious of the vacuum interlocks associated with the HV ESD.  This has not yet been explored much, but will prove annoying if it persists as you cannot remotely reset this particular trip.  It could be associated with us relocating the interlock chassis within the SUS field rack, but the chassis in question seems simple enough to have tolerated a small move.

Here is a summary for the use of the manual control test fixture (D1500130) associated with the LV ESD amplifier:

Function -> State -> Meaning
HVLV Switch -> LED Lit -> The output drive mode is selected for LV operation
QuadrantSelect -> LED Lit -> PI Drive aligned to UR or UL
HV ESD ON/OFF -> LED Lit -> Not in reset or toggle mode ie. nothing happening in reset land
Input Relay -> LED Lit -> Input quadrant drive signal is not connected to the HV ESD amplifier
PZ Bypass -> LED Lit ->  The associated Pole-Zero stage in the LV quadrant drive chain is bypassed