vernon.sandberg@LIGO.ORG - posted 14:37, Wednesday 25 January 2017 (33644)
Work Permit Summary for 2017 January 24
| Work Permit | Date | Description | alog/status |
| 6454.html | 2017-01-24 8:16 | Install movable local humidifiers. First locations: EY VEA, CS Ebay. | 33635 |
| 6453.html | 2017-01-23 15:37 | Tues maint 1/24, 1/31. In CER: Measure slow phase noise of the 8, 9.1 80 MHz Osc relative to independent oscillators, as seen on spare fanout channels; non interuptive; with Scope, RF Anal. | |
| 6452.html | 2017-01-23 15:11 | Update GDS software to version branch 2-17.9-1 to fix leap second issue. This version allows users to abort a DTT measurement that is waiting for data, and fixes minor issues of Bugzilla 469 (ezcademod channel list), 1064 (unit names truncated reading from NDS1). | 33634, 33581 |
| 6451.html | 2017-01-23 15:10 | Return CP4 pump level to the daily vacuum texts (was hardcoded out as -1). Mark all CP and Gauge values in these texts with a "!" character if their ERROR signal is in error. | 33634, 33596 |
| 6450.html | 2017-01-23 15:07 | Reconfigure the gds broadcaster to not generate MD5 check sum files. | 33634 |
| 6449.html | 2017-01-23 14:00 | Lubricate all AXIVANE Fans on site. This will require individual shut down of each fan to perform the lubrication. | 33619 |
| 6448.html | 2017-01-23 13:35 | Install improved 4.7 kHz notch filter into DARM2 bank and turn it ON to mitigate ring-up of 10th harmonic violin modes. This will affect computation of calibration group's time-dependent correction factors, so corresponding EPICs records of DARM loop model at calibration line frequencies will need to be updated. This has no affect on CAL-CS and GDS pipelines, because both will read in the updated EPICs records. Once filter change and EPICs records are accepted into SDF, the change is complete. Will be performed during maintenance tomorrow, Jan 24. | 33585, 33546 |
| 6447.html | 2017-01-23 11:24 | Turn off controller to modify its output voltage to 5.6 kV from 7.0 kV and run a system calibration. Power will be removed from the controller for the duration of this activity. After modification power will be restored for the controller. | 33571 |
| 6446.html | 2017-01-23 10:51 | Add a drop (if not already in place) and install a new dust monitor near HAM1/2. This will require a DAQ restart to pick up the new dust monitor channels. | 33634 |
| 6445.html | 2017-01-23 10:36 | Inspect and measure gate valves. This will require moving ladders around and possibly crawling on gate valves and vacuum chambers. | |
| 6444.html | 2017-01-23 9:49 | PMC Maintenance: Tweak beam alignment into the PMC to increase transmitted power. This can be done from the control room and does not require a PSL incursion. Change PMC Transmission limit in the PSL ODC from 60W to 50W and update SDF. Normal operation of the PMC is very close to the current 60W ODC limit, so I'd like to alleviate this potential issue. | 33573 |
| 6443.html | 2017-01-20 13:14 | Create a new TCS guardian node to monitor the health of the ring heaters. The code lives in /opt/rtcds/userapps/release/tcs/common/guardian | 33578 |
| 6442.html | 2017-01-20 11:59 | Have Dave B. make needed changes such that the Vacuum Team be sent a text message for the case when CP4's CDS level indication stays > 0 for longer than 10 seconds. Use a diaphragm pump to apply a vacuum (24/7, unattended) to CP4's clogged "high side" sensing line via a parallel plumbed connection. | |
| 6441.html | 2017-01-19 13:56 | Standardize the OAF range calculation, add notches to DARM BLRMS, unmonitor the OAF range calculation from SDF | |
| 6440.html | 2017-01-18 17:45 | Injections to investigate noise and for vetting. May include shaking of CPs, input arm, BS HEPI, magnetic injections and power mains injections. Will be done while LLO is down. Approved by Keita. | |
| Previous W.P. | |||
| 6286.html | 2016-10-31 10:13 | Remove Pringles from restored DOFs list of HEPI platforms: Edit guardian parameter file for each platform. Test as needed (not really needed.) | 33580 |