ObservationPossible causesRecommended solutions
High event rateAir bubble in the sheath filter or flow cellRemove the air bubble from filter
Sample is too concentratedDilute the sample
Sample flow rate is set on HISet the sample flow rate to MED or LO
Threshold level is too lowIncrease the threshold level
PMT voltage for the threshold parameter set too highSet the PMT voltage lower for the threshold parameter