+1 on checking outlets...
I use an ESP 'Smart Envision' analyzer .. it can record 5 different voltage problems, check for gnd>neut.
that will also give you power drops w/ time/date.. these readings can be saved in a .cvs file. The software to control the unit is very simple to use/install on your work laptop.
IF you have major concerns/problems analyzing the readouts, send the .cvs files to ESP, their engineers will diag them for you and make recommendations. (this unit is @ 250$US roughly)
enVision 120 - 208V
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