It would say so if it was.I am thinking of getting a better meter. How would I know if it is a true RMS meter?
I was looking at this one.
https://lygte-info.dk/review/DMMUNI-T UT191T UK.html
Why?, when his existing one looks to be perfectly fine - you wouldn't expect a pure sinewave from a UPS, there's no point.Amazon, Banggood, AliExpress and ebay do not have a clue about the cheap Chinese junk they sell. Most is no-name-brand.
Why buy a new meter? Buy a good inverter that works properly instead.
I was going to wait till it breaks.Why?, when his existing one looks to be perfectly fine - you wouldn't expect a pure sinewave from a UPS, there's no point.
I was going to wait till it breaks.
I think it was only $10.
The dial is very hard to turn.
The wire gauge of the probes is much less than on my ElectroMate UEI DM200.
It can't read resistance higher than 200 ohms and does not measure current.
You seem to be mising the point?, that it's a UPS - not a general purpose inverter. A squarewave would probably be perfectly fine, but it's quite likely to use a modified sinewave anyway.Many electronic products use a linear power supply that relies on the peak voltage of a mains sinewave. A cheap squarewave inverter has a peak voltage that is 0.71 times what the sinewave had. Then there is a sudden reduction in the power supply voltage when the UPS begins supplying the power, unless it has a modified or pure sinewave.
I would say yes. Both of the below meters are connected to the same source, a UPS with a MSW (Modified Sine Wave) output.I have a UPS for my computer.
With no power supplied to the battery backup, the voltage showed around 80 volts when I was expecting around 115 volts AC.
Is that because I do not have an RMS meter?
Yes, it's an easy upgrade, stick a much bigger battery on your UPS to make it last longer.I get several power outages per month and it has never failed me. I replaced the 8 ah battery with an 18 ah one extending its run time to 30 mins.
When I get several a month I start thinking about the merits of a backup generator. Then too, it depends on the duration of an outage I guess.I get several power outages per month and it has never failed me. I replaced the 8 ah battery with an 18 ah one extending its run time to 30 mins.
Yeah, but it was a free giveaway.May I just say, I hate the name of the left hand meter!
Nice comparison though - and as you say, true RMS meters are freely available now for very little money.