Calibration work until 05:15 UTC. UTC (Pacific) 23:00 (16:00) Start of shift. Calibration is ongoing. 00:04 (17:04) Kiwamu and Craig C. to LVEA ISC rack to measure ALS DIFF PLL open loop gain 00:11 (17:11) Corner station main entry proximity reader door forced 00:18 (17:18) end X dust monitor invalid alarm 00:37 (17:37) Daniel to CER to check RF distribution 00:43 (17:43) Daniel back 00:45 (17:45) Sheila and Daniel to LVEA to look at racks, changed ASC-AS_B_RF45 sensor cabling (alog 20838) 01:05 (18:05) Sheila and Daniel back 01:30 (18:30) Kiwamu and Craig C. back 02:50 (19:50) Momentary HEPI EX Pressure alarm The ETMX L1 UIM coil driver tripped off 3 times. Kiwamu reset it each time. 05:15 (22:15) Kiwamu done calibration work, I started attempting to lock. Spent about 20 minutes trying to find IR diff by hand. It turned out the frequency servo for the ALS DIFF VCO had been left on and was driving the frequency to H1:ALS-C_DIFF_VCO_FREQUENCY. Kiwamu turned it off. 06:13 (23:13) Evan to CER to check for possible left over issues from the changes Daniel and Sheila made. 06:19 (23:19) Evan back, no issues found Kiwamu has the IFO and is attempting to bring it back.