On Fri, 31 Jul 2020 19:00:16 +0100, alan_m
wrote:

On 31/07/2020 15:00, T i m wrote:
On Fri, 31 Jul 2020 11:24:31 +0100, Pamela
wrote:

Is this sort of plug-in power meter suitable for measuring a desktop PC with
a switched mode power supply?

I bought something similar a long time ago but found it was giving misleading
readings. Are these better now?

https://www.amazon.co.uk/Consumption.../dp/B07FZZ17ZY

I don't think they are particularly sophisticated

According to Big Clive it has a dedicated power analyser chip with a 100
page data sheet.

Cool.

I guess what I meant was 'I don't think they are particularly
sophisticated' ... compared with professional and more sophisticated
kit that costs many times more and probably comes with a 100 page
instruction book and a certificate of calibration ...'. ;-)

If they were as good for that price that would be nice to know.

Because the 'cheap stuff' is made down to a price rather than up to a
spec (or a much higher price g), they often fail / become less
accurate at the extremes, or when measuring the more awkward stuff.
All down to the laws of diminishing returns on the cheaper gear.

Cheers, T i m