10.15 DAQ continues OK 
      Current file May2017/R31_239

      Detector biases; leakage currents OK - see attachments 1 & 2
      FEE64 Temperatures OK - see attachment 3
      good events; statistics OK - see attachment 4
      No warnings/errors reported by merger since DAQ GO - see attachment 5

      *all* system wide checks OK *except* ADC calibration of nnaida1, 21 and nnaida1 clock status (status=6)

10.30 E17/F11 ambient temperature +23.8 deg C, RH 40.9%, d.p. +9.6 deg C
      Julabo FL11006 set point +20 deg C, actual +20.0 deg C, water level OK (c. 95% - refilled)

10.35 Layouts 1, 3, 4, 7 and 8 - see attachments 6-13
      Note - as expected, zero HEC events, layouts 5 & 6 not shown

10.58 DAQ stop - transient timeout nnaida1 - followed by successful stop
      File May2017/R31_248

      Delete R31

11.12 Disable data transfer
      DAQ GO - transient timeout nnaida1 - followed by successful start 
      nnaida1 system console - see attachment 14

12:00 Moved plastic veto scintillator downstream in an attempt to reduce noise
      Rates in noisy FEEs reduced by 20-30%

14:30 DAQ continues OK
      Found that pulser induces counts in some HEC (nnaida20, 14 in particular). See attachment 15. Pulser off
removes these events completely.
      These events could be mistaken for implantation events during data acquisition.
      Increasing the fast comparator threshold HEC from 2 -> 3 suppresses the events. Increasing the threshold
to 4 does not appear to have further effects.
      Even with the increased threshold some HEC (e.g. 1.0H) still see the pulser. See attachment 16 (fast
comparator threshold HEC was 0x3).
      Checked data is synchronised in file R32_33

15:29 Set the threshold back to 2. We will perform this cut off-line in the analysis.