PLANT_PRM_READY_BF_COILOUTF_H{1,2,3}.xml
We can see the large excess in H{1,2,3} -> V{1,2,3} in ~100 mHz range.
First, we suspected BF touched somewhere, but we cannot see strange point in the measurement of the GAS filters (BF,SF)
Second, we suspected the earthquake during this measurement, but we cannot see the earthquake signal as shown in Fig.1.
Third, we checked the time series of the LVDT INF signal, then we can find some larger RMS value in V monitor even we excited the H signals(Fig.2. and Fig.3.).
The main frequency would be about 0.3 Hz, so we checked the amplitude of the seismometer and
my consideration is that those excess may come from the larger microseismic as shown in Fig.4. (Red : health check time this time, Blue : health check time reference June 2024)
But, we need the confirmation for 0.1 Hz excess was really for the microseismic.
