As requested by Washimi-san, I added voltmeter plots to SummaryPage.

The ground voltage channels are added to "Local electrical ground" page.
This page shows summary of spectrum and time series of following channels and spectrum, spectrogram, and time series of each channel.
K1:PEM-VOLT_PSL_TABLE_DIFF_OUT_DQ
K1:PEM-VOLT_IMCREFL_TABLE_DIFF_OUT_DQ
K1:PEM-VOLT_ISS_TABLE_DIFF_OUT_DQ
K1:PEM-VOLT_REFL_TABLE_DIFF_OUT_DQ
K1:PEM-VOLT_AS_TABLE_DIFF_OUT_DQ
K1:PEM-VOLT_OMC_CHAMBER_DIFF_OUT_DQ

The DC power channels are added to "DC power" page.
This page shows summary of spectrum and time series of following channels and spectrum, spectrogram, and time series of each channel.
K1:PEM-VOLT_OMC_RACK_DC_P18_OUT_DQ
K1:PEM-VOLT_OMC_RACK_DC_M18_OUT_DQ
K1:PEM-VOLT_OMC_RACK_DC_PM18_OUT_DQ
K1:PEM-VOLT_OMC_RACK_DC_LG18_OUT_DQ