as i said in the main thread for this meter, i'm way way late to this party and just received mine yesterday. i got some other meters which should satisfy any needs for accuracy, but they are huge--the dimensions on paper don't begin to prepare you for the actual size. i freely admit i didn't shop this as rigorously as i usually do. i had already found a couple of great ebay deals on a fluke 289 and a hioki 4281 so i hardly needed another meter.
but those meters (esp the 289) are on the largish side and i wanted a more compact daily driver so i was shopping for a 4-1/2 digit 50k count small meter and optionally bt capability and the fluke 117 and the owon bt41 were only 6000 count and only the owon had bt. i had read and watched quite a few reviews praising eevblog and had recently joined the forum, so when i came across the 121 by accident with a good price and shipped from the usa i jumped on it without much more thought. only after i ordered it did i start seriously researching it.
but putting all that aside, i tend to really baby my electronics (i'm not the target market for your destruction derby videos for sure--but you had the most detailed info by far) and in the next couple of days i'm going to do my best to compare readings among the fluke, the hioki, and the eevblog and if the 121 is anywhere near the ballpark of those i'll be well satisfied. and the bt on the 121 means i won't have to depend on the fluke internal logging since it has no way of connecting to mac or ios even with the expensive and touchy accessory. /guy
and let me say i have no need for a really good meter--i have a $40 fluke 101 and a hioki 'card' meter both of which, combined with an outlet tester or a clamp meter, would meet most of my needs. but again, i'm a gadget collector and a ham so i appreciate nice sturdy accurate devices.
at any rate, i'm one of those nerds who reads every scrap of documentation, and with the advent of youtube, try to find the patience to sit through videos although i'm not much of a visual learner. and compared with other devices there's not that many videos on the 121gw and, (ass)uming you're the joe smith on youtube, your videos are by far the most detailed of all.
i've now watched through part 6 and learned to avoid methanol (!) and noted in your summary around 56:20 that you say (paraphrased): 'personally, i think this meter has way too many problems to be considered anything more than a gimmick. i think the real selling point is this logo (circles the eevblog logo) and if you look beyond that (something about a ?grill starter? (which i never understood what it was when you demo'd it)) ... you have to believe that uei could do a better job ... and this meter is not that robust'.
my meter came with fw v1.22 which i updated to v2.05 first thing. next i checked the bt using the ios meteor app and that process was seamless and the app works well. i have some modest components i'm going to use for reference coming in and then i plan to compare the 121 against a couple of those supposedly more accurate meters.
so i guess my question is, how can i tell if the particular sample i have has had some or all of the problems you observed corrected? since it came with v1.22 i don't have much hope though. and thanks for the videos even though about 75% of your tests i'll never have to worry about unless there's an electronics apocalypse in the future or i end up going to a ham radio field day!
/guy