
Inrush measurements benefit from an automatic pre-trigger function covering the 100 ms preceding the Inrush current waveform which can be viewed on the CA 8345. 
2 recording modes can be used to capture current and voltage waveforms , as well as all the half-period RMS values before (pre-trig), during and after the motor Inrush phase.
This additional information helps to optimize analysis of the results. 
Do you have a CA 8345? The firmware update is free of charge: 
https://www.chauvin-arnoux.com/en/support/telechargement/results/nid/22523