I'm looking for the most economical means to monitor mains voltage for spikes and other such disturbances over an unattended period of time.
I see that there are 2 categories of monitoring and logging equipment: event loggers and samplers. The former requires the setting of thresholds and will record any event that exceeds these; the latter simply samples the input at a set interval.
I am looking for a device that records events.
I'd rather avoid the very expensive power quality monitors ($2000-plus category). This reduces the list to DMMs with logging capability, which includes the Fluke 189. (I'll add that if a data-download option exists, I would prefer the ability to review data on the device rather than *require* that it be downloaded -- I want to be able to, at a glance, confirm that a power problem exists, and have the *option* to download the data for detailed examination if I wish.)
Any other suggestions to achieve my means would be greatly appreciated.