counter   HV     thr.   comments
S1        2200   170    KFKI disc
S2        2000   50     KFKI disc
S4        1920   50     KFKI disc
V0        1920   30
V1        1850   30
V1p       1950   30     light leaks ?

NB. the threshold reading on KFKI discriminators are muliplied by 3
    compared to the actual threshold !
    so to a 50 mV threshold will correspond a 150 mV reading
    for LeCroy discriminators this factor is 10 (standard)