Jenne, Keita, TVo

Successful locking of the OMC on the 00-mode!

First, the OM1-OM2-OM3 path into the OMC using QPD_A and QPD_B as a reference and closing the loops.  This left OM1 pretty close to railing in yaw and so there were some attempts to offload OM1 onto the other two but it would rail the OMC actuators when the loops were engaged.  We remedied this by zeroing the OMC alignment sliders while the OMC_ASC loops were on (this worked pretty smoothly). So Jenne offloaded again so that we do the least amount of optics sliding/rotating on the HAM6 optics table.

Fil turned the high voltage on for the PZT so that we could try to lock. There was some confusion when the OMC_DC_IN1 was railing when sweeping the PZT_OFFSET, this is still not clear why so we turned off all stages of whitening to avoid saturating.  Then we were able to achieve lock after Keita turned off the purge air,  we've left the purge turned on but lower than the previous setting.

Jenne pointed out that having about 1mW of input power from HAM5 should register about 1mA on the OMC_DC_SUM_OUTPUT when on the right mode and we're getting about that with PZT_OFFSET = 1.8.