Troubleshooting Particle Distributions

No cluster ions visible

Possible reason 1: Particles are lost before entering the instrument

Instrument inlet is not properly grounded or inlet tube is too long.

Possible reason 2: Problem with offset measurement

If the offset operating mode is not working correctly, wrong offset estimate is subtracted from ions or particles mode signal.

Solution Check if there are any diagnostic warnings shown for offset records. Check that

Possible reason 3: 9 V central electrode voltage is missing