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UNI-T UT61E Multimeter teardown photos.

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erick:
Thanks for the answers, guys.

mariush,

I didn't think there was so much difference between the models, since they belong to the same series. That explains it.

Lightages,

There is no way I can get an AM-270 for $90.00 here =/

Even the Uni-T may end up costing me about $100.00 if I get caught and have to pay taxes. Anyways, I will just look for a good price on ebay or DX.com and buy a UT61E.

In what concerns low voltage measures, I'll be probably using something like Dave's product, as mariush pointed.

dr_p:
I doubt you'll find it cheaper than from Frakie:

https://www.eevblog.com/forum/buysellwanted/brand-new-uni-t-ut61e-for-sale/

HKJ:
The burden voltage on auto ranging DMMs, include 61E, is a bit funny.
They usual combine two ranges on each switch position, i.e. two mA ranges when the switch is on mA and two uA ranges when the switch is on uA. These two ranges has to share the same resistors. This will give a low burden voltage on the low mA range and a high burden voltage on the high mA range (same for uA).

A good way to get a low burden voltage is to use a external resistor. With the UT61E a 0.1 ohm resistor will give a very good high mA range. At 1A the burden voltage will be 0.1 volt and at lower current you will have a resolution of 0.1mA.
With a external resistor it is also possible to connect the resistor without adding long test wires that add to the burden voltage (The test wires will only carry voltage, not current).

JimmyMz:
What size is the ceramic capacitor on the back of the board, corresponding to the negative battery post terminal (C36)? I scorched mine, and fixed it with an electrolytic, but I want to put a SMD part back in. I don't know SMD sizes yet, so the help is definitely appreciated. Thank you  :D

PedroDaGr8:

--- Quote from: JimmyMz on March 22, 2013, 08:40:05 pm ---What size is the ceramic capacitor on the back of the board, corresponding to the negative battery post terminal (C36)? I scorched mine, and fixed it with an electrolytic, but I want to put a SMD part back in. I don't know SMD sizes yet, so the help is definitely appreciated. Thank you  :D

--- End quote ---

It is a 1206 size (metric code 3216) 10uF capacitor.

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