For all the true electronics geek; the UNI-T UT60E taken apart and photographed! - Page 1
Forum section: electronics / general

author: glossywhite
author_rank: Regular Contributor
timestamp: January 15, 2011, 08:19:07 pm
content: I just bought a UNI-T "UT60E" DMM from Maplin for £49.99, so I thought I'd pull it apart (as any proper electronics enthusiast would). I've photographed it for your curiosity and pleasure. Please note, this is a take-apart/dis-assembly, NOT a "teardown" - I don't care for Americanismshttp://www.flickr.com/photos/22008695@N03/sets/72157625829258944/Looks like the processor is an "FS9721_LP3" - datasheet here:http://www.ic-fortune.com/upload/Download/FS9721_LP3-DS-20_EN.pdf

author: saturation
author_rank: Super Contributor
timestamp: January 15, 2011, 09:35:08 pm
content: Great job, you've captured the build quality very well.

author: glossywhite
author_rank: Regular Contributor
timestamp: January 15, 2011, 09:47:32 pm
content: Quote from: saturation on January 15, 2011, 09:35:08 pmWhy, thank you- I like to present thinks properly - I'm obsessive about it.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: January 16, 2011, 03:38:52 am
content: I took a good look of the document about the chip , not a word about the True RMS ..The meter outside does have the "True RMS" description.

author: Mr J
author_rank: Regular Contributor
timestamp: January 16, 2011, 03:48:43 am
content: Oh I hate the battery holders like that, I have a similar meter with that type of holder...pain in the balls to change the battery. Great pics!

author: johnboxall
author_rank: Unknown
timestamp: January 16, 2011, 04:42:27 am
content: Thank you, that was very interesting.

author: tyblu
author_rank: Frequent Contributor
timestamp: January 16, 2011, 07:08:13 am
content: Nice pictures! I've seen many of those cylindrical SMD resistors lately -- what are they for? Why aren't they rectangular, like thin film chip resistors? Wouldn't they be a pain in the butt?

author: DJPhil
author_rank: Frequent Contributor
timestamp: January 16, 2011, 08:56:28 am
content: Quote from: tyblu on January 16, 2011, 07:08:13 amI think theMELFresistors (that link is worth the click just for the acronym joke [probably not what you think]) are used for higher wattage precision applications on the cheap. That makes sense for R37 (90ohm 1% I think)in this picture, as well as R30A, R30B, etc., which I think are 25 ohm 0.25% (Red, Green, Black, Gold, Blue). On other meters these might be the super huge flat thick film types, or perhaps a vertical standing thick film strip a couple of cm long.At least, I think that's the case.

author: apex
author_rank: Regular Contributor
timestamp: January 16, 2011, 01:42:17 pm
content: Good work!Couldn't the True RMS circuit be outside the main controller?apex

author: flapjackboy
author_rank: Contributor
timestamp: January 16, 2011, 01:47:00 pm
content: Quote from: tyblu on January 16, 2011, 07:08:13 amThey look very much like regular through-hole resistors that have had their lead clipped right up close to the body.

author: Fryguy
author_rank: Regular Contributor
timestamp: January 16, 2011, 01:55:45 pm
content: DJPhil and flapjackboy got it right .These are simply standard resistors without the pins attached to their endcaps for through-hole-mounting - they are needed for higher wattage and will be good quality parts at very low cost .

author: tinhead
author_rank: Super Contributor
timestamp: January 16, 2011, 03:24:54 pm
content: Quote from: apex on January 16, 2011, 01:42:17 pmlike in app note, AD737 (U4 on the PCB) is for True RMS

author: mitpatterson
author_rank: Regular Contributor
timestamp: January 16, 2011, 03:44:46 pm
content: Just a note, i made a few comments/questions on the photo's them selves, that way i didn't have to link a lot here and stuff

author: tyblu
author_rank: Frequent Contributor
timestamp: January 16, 2011, 05:55:57 pm
content: Quote from: DJPhil on January 16, 2011, 08:56:28 amQuote

author: CJWarlock
author_rank: Contributor
timestamp: November 09, 2013, 08:59:13 pm
content: Good work, glossywhite. I've got one UT60-E but haven't opened it yet.I've investigated the question of UT60-E's genuinity before I bought one. There were differences in its front panel design over several sellers and I was affraid of buying a counterfeit. I wrote an e-mail to the producers, twice but they didn't reply. However I got a decent explanation from the official distrubutor for Poland. I've started a topic on that on a Polish electronics forum named Elektroda.pl where I've covered the subject comprehensively. Maybe I'll share my findings here as I think they might help a lot someone in a similar position. What do you think?

author: cowasaki
author_rank: Frequent Contributor
timestamp: January 14, 2018, 11:15:21 pm
content: I've had and used one of these for a couple of years and found the quality pretty good. Still my main DMM although I'm looking at a decent bench DMM as my main DMM.