Reports until 11:51, Friday 20 February 2026
H1 SEI
anthony.sanchez@LIGO.ORG - posted 11:51, Friday 20 February 2026 (89213)
SEI seismometer mass position check - Monthly

Famis 38888 SEI seismometer mass position check - Monthly :

Checking T240
Checking STS
Finished
Averaging Mass Centering channels for 10 [sec] ...
2026-02-20 11:36:02.279522


There are 12 T240 proof masses out of range ( > 0.3 [V] )!
ETMX T240 2 DOF X/U = -1.716 [V]
ETMX T240 2 DOF Y/V = -1.819 [V]
ETMX T240 2 DOF Z/W = -0.998 [V]
ITMX T240 1 DOF X/U = -2.377 [V]
ITMX T240 1 DOF Z/W = 0.459 [V]
ITMX T240 3 DOF X/U = -2.547 [V]
ITMY T240 3 DOF X/U = -1.089 [V]
ITMY T240 3 DOF Z/W = -3.077 [V]
BS T240 2 DOF Z/W = 0.346 [V]
BS T240 3 DOF X/U = -0.518 [V]
HAM8 1 DOF Y/V = -0.428 [V]
HAM8 1 DOF Z/W = -0.728 [V]


All other proof masses are within range ( < 0.3 [V] ):
ETMX T240 1 DOF X/U = -0.006 [V]
ETMX T240 1 DOF Y/V = -0.037 [V]
ETMX T240 1 DOF Z/W = -0.03 [V]
ETMX T240 3 DOF X/U = -0.024 [V]
ETMX T240 3 DOF Y/V = -0.07 [V]
ETMX T240 3 DOF Z/W = -0.043 [V]
ETMY T240 1 DOF X/U = 0.057 [V]
ETMY T240 1 DOF Y/V = 0.198 [V]
ETMY T240 1 DOF Z/W = 0.253 [V]
ETMY T240 2 DOF X/U = -0.087 [V]
ETMY T240 2 DOF Y/V = 0.215 [V]
ETMY T240 2 DOF Z/W = 0.046 [V]
ETMY T240 3 DOF X/U = 0.268 [V]
ETMY T240 3 DOF Y/V = 0.085 [V]
ETMY T240 3 DOF Z/W = 0.136 [V]
ITMX T240 1 DOF Y/V = 0.289 [V]
ITMX T240 2 DOF X/U = 0.131 [V]
ITMX T240 2 DOF Y/V = 0.257 [V]
ITMX T240 2 DOF Z/W = 0.242 [V]
ITMX T240 3 DOF Y/V = 0.119 [V]
ITMX T240 3 DOF Z/W = 0.061 [V]
ITMY T240 1 DOF X/U = 0.062 [V]
ITMY T240 1 DOF Y/V = 0.159 [V]
ITMY T240 1 DOF Z/W = 0.027 [V]
ITMY T240 2 DOF X/U = 0.021 [V]
ITMY T240 2 DOF Y/V = 0.243 [V]
ITMY T240 2 DOF Z/W = 0.16 [V]
ITMY T240 3 DOF Y/V = 0.082 [V]
BS T240 1 DOF X/U = 0.261 [V]
BS T240 1 DOF Y/V = -0.212 [V]
BS T240 1 DOF Z/W = -0.179 [V]
BS T240 2 DOF X/U = 0.142 [V]
BS T240 2 DOF Y/V = -0.271 [V]
BS T240 3 DOF Y/V = 0.061 [V]
BS T240 3 DOF Z/W = -0.263 [V]
HAM8 1 DOF X/U = -0.3 [V]


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


2026-02-20 11:36:14.268587
There are 2 STS proof masses out of range ( > 2.0 [V] )!
STS EY DOF X/U = -4.582 [V]
STS EY DOF Z/W = 2.384 [V]


All other proof masses are within range ( < 2.0 [V] ):
STS A DOF X/U = -0.51 [V]
STS A DOF Y/V = -0.798 [V]
STS A DOF Z/W = -0.581 [V]
STS B DOF X/U = 0.108 [V]
STS B DOF Y/V = 0.953 [V]
STS B DOF Z/W = -0.309 [V]
STS C DOF X/U = -0.871 [V]
STS C DOF Y/V = 0.868 [V]
STS C DOF Z/W = 0.593 [V]
STS EX DOF X/U = 0.507 [V]
STS EX DOF Y/V = -0.551 [V]
STS EX DOF Z/W = -0.392 [V]
STS EY DOF Y/V = 1.204 [V]
STS FC DOF X/U = 0.153 [V]
STS FC DOF Y/V = -1.174 [V]
STS FC DOF Z/W = 0.637 [V]


Assessment complete.
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