B. Bland, R. Lane, F. Clara

Further work continued on debugging the electronics, OSEMS, and cables for the UIM and PUM stages.

The mysterious signals in the PUM channels (when no OSEMs were connect to the PUM cables, signals were appearing in all of the PUM EPICs channels) was traced back to the AA Chassis as the possible culprit. No cause or resolution has been found as of yet. The temporary replacement AA Chassis appeared to be functioning, but when work continued it was found to have the same issue. One OSEM was connected, but four OSEM signals were being displayed in the four PUM EPICs channels. When the light was blocked for the one connected OSEM, no change was observed in EPICs.

It is almost impossible to seat the fan-out cables for the UIM stage without removing the UIM OSEMs completely. It also doesn't help that periodically one of the micro DB-9 connectors have mismatched fasteners. In-order to ensure a proper seat of each connector to each OSEM, all UIM OSEMs were completely removed. Open Light and Closed Light values were recorded. The Open Light offsets and gains have been loaded. The "new" flat QUAD flags are impossible to center in the BOSEM on the UIM with the existing flag mounts. The "old" round flags have been installed for the UIM BOSEMs.As well, center the flags/OSEMs for 50% counts had a lot of run-out, making it quite difficult, because rotation was so cross-coupled to the in/out. We opted not to swap the run-outs because it will be done when we swap out the Nickel-plated SMCO magnets in approximately two weeks during the cartridge install. Only one cam was used on each OSEM mounting bracket at the UIM due to the extreme difficulty in maneuvering the brackets.

ITMY has UIM BOSEMs mounted and approximately centered, the M0 and R0 chains are hanging free, and it has not been "socked".