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UNI-T UT61E Multimeter teardown photos.

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wasyoungonce:
Ok meter Cal was all over the place...replace 2K POT dud rough Cal to variable PSU now have Cheap Chinese voltage std AD584KH, on ref IC, says AD584-M on plastic case.
Here.  Has inbuilt battery and odd USB recharge connector.  Sigh I hate that but I couldn't build it for that price ~ $20 Aud.

Didn't come with any Cal info. 

Anyway my UT61E wasn'yt out much and is behaving much better since the Pot change, no wild changes in calibration.  I did tweak the Cal a little, its all good.  Now I want a Resistance std...probably just get some precision resistors.  I think I'm just been bitten by the bug!  Oh my older multimeters are shall we say..."in need of calibration" :-DD

Many thanks to the forum members for help. :-+

escape:
Chinese vs EU version differences aside, are there any counterfeit/knockoff UT61Es out there?  If so, how can you tell it's a knockoff?

I'm seeing a bunch of them on US ebay for under $35 (including free shipping from within US), and wondering why the price is so low.  I'm guessing they don't carry official Uni-T warranty.

escape:

--- Quote from: wasyoungonce on April 06, 2018, 02:59:19 am ---Didn't come with any Cal info. 

--- End quote ---
Without actual calibration info against a known reference meter, that AD584 box is fairly useless.  It should have come with actual reference values printed on a sticker attached to the bottom of that AD584 rig.  Mine looks like this:



Of course there is some controversy as to whether these sticker values are actual measured values or just some random numbers that someone made up or copied from another sticker.   |O

Stinger:
We believe a F version with factory backlight and ESR mesurement.  ;D

joeqsmith:

--- Quote from: escape on April 18, 2018, 01:12:16 pm ---
--- Quote from: wasyoungonce on April 06, 2018, 02:59:19 am ---Didn't come with any Cal info. 

--- End quote ---
Without actual calibration info against a known reference meter, that AD584 box is fairly useless.  It should have come with actual reference values printed on a sticker attached to the bottom of that AD584 rig.  Mine looks like this:



Of course there is some controversy as to whether these sticker values are actual measured values or just some random numbers that someone made up or copied from another sticker.   |O

--- End quote ---

Even with the sticker, and even if they did correctly copy it from some random HP34401A, you have no idea if the meter they checked it against was even in current cal.   You could have the standard sent in and get a NIST traceable report for it but it may cost far more than the little device cost.   

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