JessM pointed out to us that the H1:ISI-BS_ST1_GNDSTSINF_B_[X,Y,Z]_INMON signals were flat in the BLRMSs, since 5 June.  McCarthy suggested that the PEM crew may have disturbed the unit and stuck it on the rail.  A few pushes on the zero button at the local satellite box got the signals in range again.  X & Z still have some larger DC component so maybe the level of the instrument has been shifted.