Josh reported H1:PEM-EY_ACC_BSC10_ETMY_Z as glitchy in an email Oct 5. Today during maintenance I went down to EY and replaced the accelerometer and also put it through a different channel (channel 1) on the endevco (accelerometer power supply / signal conditioning box), pictures attached. The cable going into the sensor itself was slightly loose before I changed anything.

Looking back at the history of this channel (also attached), it looks like this accelerometer went down at ~17UTC on Sep 8 and started working again on Sep 14 ~19UTC for unknown reasons (possibly loose cable).  I don't know whether the glitchyness reported by Josh continued after the 14th, when the timeseries returned to expected values. In any case, there is a new sensor there now and spectra/timeseries both look good.

Also, I had noticed that H1:PEM-EY_ACC_BSC10_ETMY_X had been unplugged at the electronic racks, so I plugged it back in (looks like its been unplugged since last tuesday).