Reports until 13:22, Sunday 09 November 2025
H1 SEI (SEI)
ibrahim.abouelfettouh@LIGO.ORG - posted 13:22, Sunday 09 November 2025 (88025)
SEI seismometer mass check - Monthly FAMIS

Closes FAMIS 27509, last checked in alog 87296

Similar results to last week with 12 T240 masses out of range compared to last month's 13. Same results for STS.

Averaging Mass Centering channels for 10 [sec] ...
2025-11-09 13:18:07.263464


There are 12 T240 proof masses out of range ( > 0.3 [V] )!
ETMX T240 2 DOF X/U = -1.566 [V]
ETMX T240 2 DOF Y/V = -1.576 [V]
ETMX T240 2 DOF Z/W = -0.951 [V]
ITMX T240 1 DOF X/U = -2.22 [V]
ITMX T240 1 DOF Z/W = 0.466 [V]
ITMX T240 3 DOF X/U = -2.34 [V]
ITMY T240 3 DOF X/U = -1.07 [V]
ITMY T240 3 DOF Z/W = -2.835 [V]
BS T240 1 DOF Y/V = -0.353 [V]
BS T240 3 DOF Z/W = -0.431 [V]
HAM8 1 DOF Y/V = -0.453 [V]
HAM8 1 DOF Z/W = -0.761 [V]


All other proof masses are within range ( < 0.3 [V] ):
ETMX T240 1 DOF X/U = -0.034 [V]
ETMX T240 1 DOF Y/V = -0.086 [V]
ETMX T240 1 DOF Z/W = -0.1 [V]
ETMX T240 3 DOF X/U = -0.076 [V]
ETMX T240 3 DOF Y/V = -0.11 [V]
ETMX T240 3 DOF Z/W = -0.091 [V]
ETMY T240 1 DOF X/U = -0.014 [V]
ETMY T240 1 DOF Y/V = 0.16 [V]
ETMY T240 1 DOF Z/W = 0.21 [V]
ETMY T240 2 DOF X/U = -0.092 [V]
ETMY T240 2 DOF Y/V = 0.195 [V]
ETMY T240 2 DOF Z/W = 0.002 [V]
ETMY T240 3 DOF X/U = 0.224 [V]
ETMY T240 3 DOF Y/V = 0.012 [V]
ETMY T240 3 DOF Z/W = 0.116 [V]
ITMX T240 1 DOF Y/V = 0.26 [V]
ITMX T240 2 DOF X/U = 0.16 [V]
ITMX T240 2 DOF Y/V = 0.256 [V]
ITMX T240 2 DOF Z/W = 0.217 [V]
ITMX T240 3 DOF Y/V = 0.098 [V]
ITMX T240 3 DOF Z/W = 0.103 [V]
ITMY T240 1 DOF X/U = 0.051 [V]
ITMY T240 1 DOF Y/V = 0.108 [V]
ITMY T240 1 DOF Z/W = -0.026 [V]
ITMY T240 2 DOF X/U = 0.018 [V]
ITMY T240 2 DOF Y/V = 0.216 [V]
ITMY T240 2 DOF Z/W = 0.118 [V]
ITMY T240 3 DOF Y/V = 0.068 [V]
BS T240 1 DOF X/U = -0.106 [V]
BS T240 1 DOF Z/W = 0.149 [V]
BS T240 2 DOF X/U = 0.063 [V]
BS T240 2 DOF Y/V = 0.147 [V]
BS T240 2 DOF Z/W = 0.037 [V]
BS T240 3 DOF X/U = -0.176 [V]
BS T240 3 DOF Y/V = -0.29 [V]
HAM8 1 DOF X/U = -0.23 [V]


Assessment complete.
Averaging Mass Centering channels for 10 [sec] ...


2025-11-09 13:18:19.262567
There are 2 STS proof masses out of range ( > 2.0 [V] )!
STS EY DOF X/U = -4.593 [V]
STS EY DOF Z/W = 2.266 [V]


All other proof masses are within range ( < 2.0 [V] ):
STS A DOF X/U = -0.436 [V]
STS A DOF Y/V = -0.917 [V]
STS A DOF Z/W = -0.49 [V]
STS B DOF X/U = 0.167 [V]
STS B DOF Y/V = 0.938 [V]
STS B DOF Z/W = -0.364 [V]
STS C DOF X/U = -0.708 [V]
STS C DOF Y/V = 0.764 [V]
STS C DOF Z/W = 0.522 [V]
STS EX DOF X/U = -0.201 [V]
STS EX DOF Y/V = -0.136 [V]
STS EX DOF Z/W = 0.122 [V]
STS EY DOF Y/V = 1.246 [V]
STS FC DOF X/U = 0.188 [V]
STS FC DOF Y/V = -1.118 [V]
STS FC DOF Z/W = 0.629 [V]


Assessment complete.