EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: cvanc on June 21, 2019, 12:47:41 pm

Title: Name an inexpensive DMM with True RMS?
Post by: cvanc on June 21, 2019, 12:47:41 pm
So, what are the trustworthy DMMs down in the "cheap" price range that do a good job of reading TRMS?

Thinking of getting a couple for a dedicated bench function... thanks.
Title: Re: Name an inexpensive DMM with True RMS?
Post by: larsdenmark on June 21, 2019, 01:02:18 pm
Uni-T 139A and upwards as well as Unit-T 61D and 61E are TRMS.

I think all Brymen multimeters that are not pocket multimeters are TRMS, but they are more expensive.

The Uni-T 61D or 61E may be the best options for bench work since they come with a USB-cable so you can collect data from the multimeters.
Title: Re: Name an inexpensive DMM with True RMS?
Post by: djnz on June 21, 2019, 01:48:25 pm
ANENG 8008 / 8009.
Title: Re: Name an inexpensive DMM with True RMS?
Post by: Electro Fan on June 21, 2019, 08:00:30 pm
Quote from: djnz on June 21, 2019, 01:48:25 pm
ANENG 8008 / 8009.

+1 for Aneng 8008, especially for low voltage DC work.
(I'd exercise caution with AC/high voltage work - no particular reason other than to be cautious)

It used to be possible to find these, some times new in the box for about $20 but that might be difficult now:
https://www.ebay.com/itm/Radio-Shack-True-RMS-Digital-Multimeter-/333120171027?epid=1728461874&hash=item4d8f826c13%3Ag%3A1p8AAOSwMuBcjaOu&nma=true&si=2xqjpYdQs9bEIypK6ZayjxtoRtI%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557 (https://www.ebay.com/itm/Radio-Shack-True-RMS-Digital-Multimeter-/333120171027?epid=1728461874&hash=item4d8f826c13%3Ag%3A1p8AAOSwMuBcjaOu&nma=true&si=2xqjpYdQs9bEIypK6ZayjxtoRtI%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557)

After these, maybe Uni-T, and Brymen - just a matter your specific needs and budget.....
Title: Re: Name an inexpensive DMM with True RMS?
Post by: rsjsouza on June 21, 2019, 08:15:54 pm
Uni-T UT139C (the Amazon equivalent is only $20.00).
https://www.amazon.com/Digital-Multimeter-Synerky-Temperature-Measurement/dp/B077ZQ2Z5S (https://www.amazon.com/Digital-Multimeter-Synerky-Temperature-Measurement/dp/B077ZQ2Z5S)

Well built meters and reasonable input protection. The design is several years old and it is proven to be quite a reliable DMM. 

Up in the reasonably priced range would be the UT-61E with many more features, adds bargraph and remote logging, but its input protection is not great (if that is important to you).

The Anengs have a wide gap in the current range and not great input protection (if these are important for you). I would look at the Mestek DM91A before considering the Anengs.

Some interesting tests are at: https://lygte-info.dk/info/indexDMMReviews%20UK.html (https://lygte-info.dk/info/indexDMMReviews%20UK.html)
Title: Re: Name an inexpensive DMM with True RMS?
Post by: Fungus on June 21, 2019, 08:30:50 pm
Nobody's asked what bandwidth is needed yet?  :popcorn: