Products > Test Equipment
Review and tear-down of UNI-T UT612 LCR meter
<< < (17/21) > >>
HiTech:
Wytnucls --- that's not my Uni-T meter up for sale --- mine was sold awhile back. Don't rush to assume things.

BTW, Ali Baba has the lowest price for the Applent AT825  It just depends who you contact for a quote..... some vendors even include a copy of the manual in print rather than having to d/l it off the net.  If I recall correctly, a friend of mine bought his for under $180 and that included e-packaging from China and a printed manual.

Wytnucls:
Wow, what a coincidence...the only UT612 for sale in the US with Kelvin clips and it's not yours. And guess what...he's also selling a Datron 1065A just like yours. Sure you don't have a twin brother? Never mind.
Enjoy the Applent. It's good that it comes with a hard copy of the manual like the meters from Agilent. and I hope it also comes with a magnifying glass to decipher those small fonts.  >:D


MarkPalmer:
Modern day manufacturers, especially those operating out of the orient, have it down to a science with very few exceptions to the rule.  You are going to get what you pay for.  You can see in my picture of the Applent AT825 circuitry that quite a bit more goes in to it by comparison to the Uni-T LCR, and that in a nutshell is why it costs more.
 
I should have been clear in my previous post about the Uni-T 100 kHz ranges.  The number of ranges isn’t necessarily limited, but the values of capacitors and inductors it can test at 100 kHz are limited to values to where the comparison of the measurements between 10 and 100 kHz would be very negligible, but perhaps of some concern depending on the applications the LCR is used for. This is the same with true 4 wire ohms measurement values.  With an LCR it might matter to some, for others 4 wire testing might not be a critical factor.  Still, my feeling is it’s a feature every LCR meter should include as a precision resistance measurement tool.  Perhaps all LCR’s should have the 100 kHz test frequency be useable at all maximum values in the specifications, but this is where it can get confusing and is a big reason why LCR’s step up steeply in price depending on the usefulness of the LCR at 100 kHz and the values of components it can test at that frequency.
 
I think a lot of audiophile types see a low priced LCR with the 100 kHz test frequency and think hey, wow, I can test the values of all my esoteric audio E-Caps at a response up to 100 kHz!  Cool!  The problem is they don’t really look at the specs before buying to see what the capacitor value limits are- they will likely be disappointed in this figure on a low priced LCR that features a 100 kHz test frequency.  It’s sort of the same scenario in that the number of megapixels a digital camera has doesn’t necessarily mean it will take the highest quality of digital photos, but putting the high figure there makes for a more impressive selling point. You really have to look at what it is you are getting for the money.

AT825 internals:


-Mark-
 
Wytnucls:
I have some trouble understanding why an LCR meter consisting of a bunch of tightly packed opamps, transistors and discrete components would be any better than a couple of properly developed and time tested ICs with just a few supporting components around them. After all, that's the way the industry is moving forward, probably at a lower cost, but mostly for higher reliability.

Should your Applent meter fail after the 1-year warranty period, you will have to throw it away and buy another one. If someone fries one of the ICs on any the Cyrustek-equipped meters, there is a good chance that the company will send replacement components on request for free, as reported by one of the members here, just a few months ago.

4W resistance measurement capability is quite rare on a portable 4 1/2 digits instrument, but very common on bench meters with much higher counts and accuracy. Tellingly, the published accuracy for the Applent isn't that great on the 5 Ohm range (1%+3) compared to the 612 20 Ohm range (1%+5).

HiTech:

--- Quote from: MarkPalmer on September 17, 2014, 02:56:20 pm --- It’s sort of the same scenario in that the number of megapixels a digital camera has doesn’t necessarily mean it will take the highest quality of digital photos, but putting the high figure there makes for a more impressive selling point. You really have to look at what it is you are getting for the money.

-Mark-

--- End quote ---
True - there are many older digital SLR cameras of 4-5 megapixels with quality glass optics that take better images overall than 12+ megapixels using plastic aspherical lenses.

Question:  is that foggy area on the pcb of the 825 caused from the camera flash? It almost resembles a part(s) that smoked!
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod