Author Topic: Review: Uni-T UT136B, Tired of the multimeter snobs? A very nice budget meter!  (Read 44453 times)

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Offline Lightages

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I decided to see how cheap you can go and still get a decent meter. What can you get $20? I don't know, but up your budget to $21 shipped to your door and you might be surprised. I was.

Is it safe for high energy circuits or does it even meet its CAT ratings? No, but it is worth buying if you really can't afford $50, $100, or $200 plus.

 
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Offline don.r

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Nice review. Now selling on ebay for US$16!
Shippers: for the love of Pete and all that is holy, STOP USING UPS INTERNATIONAL!
 

Offline Lightages

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Wow, $16 shipped! This meter is even more of a bargain than I thought.
 

Offline TerminalJack505

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Thanks for the review.  Looks like a pretty good meter for the money. 

There's a company on Amazon that ships from New Jersey selling them for $13.76 plus $4.49 shipping.  Not as good a deal as the ones on Ebay but probably quicker shipping for those in the western hemisphere.
 

Offline don.r

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Great deal if you live in the US but they won't ship outside.

"We're sorry. This item can't be shipped to your selected destination. You may either change the shipping address or delete the item from your order."

Shippers: for the love of Pete and all that is holy, STOP USING UPS INTERNATIONAL!
 

Offline true

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Looks like a decent meter. These are not listed on the English language Uni-Trend site, so to aid search results, here's the differentiators as stated in the video:

UT136A standard meter
UT136B from standard, adds capacitance measurement
UT136C from standard, adds temperature measurement and probe
UT136D from standard, adds non-contact voltage detection

I've already got enough multimeters but at this price I couldn't help but order a UT136B and UT136D as good-enough beater meters. Thanks for the review.
 

Offline Wytnucls

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Nice review. Could be a winner in the 20$ range, just like the 61E is in the 50$ one. Any competitors?
Is that LCD really glued to the PCB?. That's a first for UNI-T, as far as I know. I guess some shortcuts were needed at that price point.
Can't wait to see the 5000 volt test.  :o
 

Offline Lightages

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Nice review. Could be a winner in the 20$ range, just like the 61E is in the 50$ one. Any competitors?
Thanks. I don't think so. I am not in the habit of researching cheap meters except I know that I won't touch another Mastech, no matter the price.

Is that LCD really glued to the PCB?. That's a first for UNI-T, as far as I know. I guess some shortcuts were needed at that price point.
The LCD is held in place by the circuit board being held against the front case with the screw and the back case when it is assembled. The glue on the little locating pins is probably just to make it easier to assemble so that the LCD doesn't fall away from the circuit board when inserting the board into the front half of the case.

Can't wait to see the 5000 volt test.  :o
I don't think I will bother doing that test. The first reason is that the manual clearly states to not use the meter above 500V, and it is only CATII600V rated, and that quite optimistic too. The other thing is if it happens to pass a 5000V torture test then it might encourage people to use it on high energy circuits and I prefer to not encourage that behavior with this meter.
 

Offline true

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Got my UT136B and UT136D in today.

I like the feel. They fit the hand well and don't look as cheap as in the video / photos. VERY solid...I was expecting more plastic creaking at this price. The manual has some pretty brillant engrish. The leads are certainly adequate for the price. I do wish Uni-T would color code the input jacks.

In the UT136D, there are three one-turn pots right next to eachother, labeled VR1, VR2, VR3. VR1= closest to the center screw post and is for DCV, VR2= next one and is ACV, VR3=...? - there is no capacitance range on the 'D and the 'B model has the additional fourth pot way on the left which probably is for capacitance, so I don't know what VR3 does.

DMMCheck Plus measurements are very good for both meters, especially resistance which is at most one count out. Resistance auto-ranging is VERY slow.

Tore down my UT136D as it wasn't doing NCV very well. Nothing looked wrong, soldering looked top notch. LCD came off when I flipped the board (it is held in by pressure, and there was no glue on mine), cleaned with IPA around the NCV area, and tried again...almost nothing. My Amprobe PM55A that I got the day before worked flawlessly and things are plugged in, so I know it has to work. Then I read the manual... and it's for 220V only =( If you are in the USA like I am, don't bother with the UT136D for the non-contact voltage detector; it won't work. Too bad I couldn't find a manual for this beforehand, oh well =(

Nothing I have tried in this price range comes close with autoranging, features, and build quality. I'll still use the Flukes and Agilents on the bench but have no problem using this for basic stuff in the field.
« Last Edit: June 05, 2013, 02:44:23 am by true »
 

Offline Lightages

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Thanks true for the follow up. It is nice to know that the D model isn't worth buying. So in the end I would say that just the B and C models are worth the money.

I am glad you got good leads!
 

Offline don.r

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The $16 meter arrived today. 14 days from China to Canada, not too bad at all. Looks and works as expected which is fantastic for $16! Even came with 9V battery installed! :-+

One thing to note, the multipurpose socket that comes with the UT61E fits and functions with this meter (when placed across +Volts and Amps terminal). Bonus! I think this is THE best bargain electronics meter on the market. Far better than 3 DT830B pieces of garbage for the same money.
Shippers: for the love of Pete and all that is holy, STOP USING UPS INTERNATIONAL!
 

Offline david77

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If your in Europe and have a Conrad store close by you can get it as a rebadged VC-170 from them for about 29 Euros.
It really isn't that bad for a cheap meter, even has sort of HRC fuses in it. Conrad specced BS1363 6kA breaking capacity fuses in their version.

http://www.conrad.com/ce/en/product/124403/Voltcraft-VC170-Digital-Multimeter-4000-counts-CAT-III-250-V

I haven't compared the specs of the two meters too closely, so there might be other differences.
 

Online xrunner

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Thanks for the review.

I found the C model that measures temp. for $18 on Ebay.

Shoot, how can I go wrong for that price?  :-// I'm ordering one tomorrow.
I am a Test Equipment Addict (TEA) - by virtue of this forum signature, I have now faced my addiction
 

Offline Lightages

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The only thing that can go wrong is if you get a bad set of leads like I did. But really, I am quite impressed with this little meter for the price.
 

Offline Jebnor

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I just ordered a B and C version for ~$20 CND each. And some 'BEST 402 Ultra-Sharp Multimeter Test Leads' for $5.  Thanks for the great review.
Before this, there was a typo.
 

Offline Lightages

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Those leads you ordered are also going to be in my mulitmeter leads comparison/shootout/torture test. I doubt they will be the "BEST". Anything that is labelled "PRO" or "BEST" is usually the opposite.
 

JuanPC

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I decided to see how cheap you can go and still get a decent meter. What can you get $20? I don't know, but up your budget to $21 shipped to your door and you might be surprised. I was.

Is it safe for high energy circuits or does it even meet its CAT ratings? No, but it is worth buying if you really can't afford $50, $100, or $200 plus.


How many Chinese workers died making that DMM? :-DD
 

Offline Lightages

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How many Chinese workers died making that DMM? :-DD

I bet many less than those who have died making iphones.....
 

Online xrunner

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Got the UT136C today. Quite pleased with it. The leads I got don't seem very plasticky, and they both work.  :)

Nice little meter all-in-all.
I am a Test Equipment Addict (TEA) - by virtue of this forum signature, I have now faced my addiction
 

Online xrunner

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I tested the temp. measurement using my Hakko soldering station which I know is very accurate, having tested it using a Hakko (clone) FG-100. I set the station to 200C because the DMM manual states that only temps up to 230C can be measured with the supplied type K thermocouple.

The manual states that the accuracy from 0 - 400C is +/-(2.5% + 3). So measuring 200C were looking at +/- (5 + 3 counts) or +/- 8C. The meter read 202C.

Note: The DMM does not present any decimal places when measuring temp.

At room temp my trusty digital thermometer reads 81 F which is what my room thermostat is set to, or 27.2C.

The DMM reads 30C which would appear to also be within spec.

+/- (2.5% + 3) @ 27.2C

+/- (0.68 + 3) or +/- 3.68C
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Offline nukie

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I didn't watch the video, did you do a teardown, the new uni t are shipping with bare copper tracks for the mode selector dial.

Sent from my Nexus 10 using Tapatalk 2

 

Offline Lightages

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I didn't watch the video, did you do a teardown, the new uni t are shipping with bare copper tracks for the mode selector dial.

The traces on mine were plated, either with a nickel plating or a gold alloy. I would bet nickel. I always do a teardown! :)
 

Offline true

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Mine also were plated, IIRC. Would have to tear it apart again to verify, but I use this thing in my work truck so don't have it here...

About all I can add is that the leads have deformed from being wrapped around the meter...but the meter is in the truck, which is parked in the sun with 110F outside heat. No telling what it is inside. I'm surprised that more things don't melt.
 

Offline la6ala

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Great review of that little cheap meter. Ordered one this day.
Bad thing about those testleads but...
 

Offline hgg

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Do you know what is the burden voltage of the UT136B ?
I am thinking of buying one.  The UT136C with temperature measurement.

Also, have you measured the resistance of its probes?
They are usually crap and its always a good thing to buy a set of good leads when using
cheap multimeters.

Finally does the manual state the minimum signal voltage for correct frequency measurement?
I had the UT120C but it had high signal requirements for frequency measurement, while the
UT61E is more sensitive.

I cannot find the UNI-T online manuals for previous products.  What happened, did UNI-T
removed all the info on its 2013 and older multimeter series?

Thanks.
 

Offline Wytnucls

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I'm not sure which older operating manual you're after, but most of them are available on the site in English:

http://www.uni-trend.com/product.html

 

Offline hgg

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The UT120C Manual.
 

Offline Wytnucls

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Most of the specs are here:
https://www.eevblog.com/forum/testgear/uni-t-ut120c-review-and-tear-down/msg180726/#msg180726
From the manual:
Input sine wave     10Hz~10kHz   >1V RMS    10kHz~100kHz   >30V RMS
 

Offline Wytnucls

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From the Chinese manual for the UT136 range (ABCD):
Below 100kHz   > 300 mV RMS      Above 100kHz  > 600 mV RMS
« Last Edit: January 10, 2014, 02:47:15 pm by Wytnucls »
 

Offline hgg

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From the Chinese manual for the UT136 range (ABCD):
Below 100kHz   > 300 mV RMS      Above 100kHz  > 600 mV RMS

Perfect for my project!  The UT61E is even better with
Below 10MHz   > 300 mV RMS      Above 10MHz  > 400 mV RMS
Thanks!

Now, if lightages can also tell us the burden voltage of the UT136B it would be great!

I will combine the multimeter with the following Brymen probes that Franky is selling on ebay:
http://www.ebay.com/itm/Brymen-Silicone-Gold-Plated-Test-Leads-Probes-Multimeters-CAT-IV-1000V-/171162377470?pt=LH_DefaultDomain_0&hash=item27da129cfe

0.024 Ohms internal resistance confirmed by Franky.  Not bad at all.  Silicon and gold plated as well.
I think it will make a nice portable combo for the price.  I am not sure if they will fit though.

« Last Edit: January 10, 2014, 04:01:53 pm by hgg »
 

Offline Lightages

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This little meter is really good for current measurement. The resistance on each of the ranges is as follows; 100 ohm in microA, 1.3 ohm in mA,  0.025 ohm in A. This is basically the same as a Brymen! You will also most definitely be happy with the Digitek leads from Franky.
« Last Edit: January 10, 2014, 04:04:57 pm by Lightages »
 

Offline SeanB

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Those are nice looking leads Frankie has.
 

Offline hgg

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Thanks for the information.    100 Ohms in the uA range ??
The leads are Brymen, not Digitek.

Only problem is the multimeter.  I can only find the C version in DX and am not really a fan
of DealExtreme.  Slow shipping and you don't really know if they actually have the items in stock.

Maybe you know of an alternative online shop that is selling the C version.
Did you buy yours from ebay?
 

Offline Lightages

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Yes, 100 ohms in the microamp range. The Brymen leads are outstanding leads in any price range. I think they are a bit overkill when you consider you are paying almost the same for the leads as the meter. For the combined price of the UT136X and the Brymen leads you can almost pay for the Digitek DT2843R and have a much more capable multimeter with the really nice leads already. The Digitek leads are very nice with the exception that the tips are not very sharp but they are a better match price wise for the UT136X than the Brymen leads.

Yes I purchased my UT136B from DX and no I don't like them very much neither but options for getting things to Chile are limited and everything has always arrived. They are slow but reliable IMHO.
 

Offline Terabyte2007

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I decided to see how cheap you can go and still get a decent meter. What can you get $20? I don't know, but up your budget to $21 shipped to your door and you might be surprised. I was.


I have Fluke, ExTech and a couple Uni-T, and I really like them. I have the 61E, and I really think it's a nice multimeter. I have to agree with you, there are some decent cheaper brands, you just need to do the research.

Eric Haney, MCSE, EE, DMC-D
Electronics Designer, Prototype Builder
 

Offline hgg

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The UT61E has 12 ohms in the mA range.  The UT126B with 1.3ohms is 9 times more accurate then!
(or the UT61E is 9 times less accurate...   :()

I was also thinking of the Digitek solution instead of the Uni-T + Leads, but I'm not really sure.
I don't receive good vibes from Digitek...   :)   The other reason is that I need something compact. 

I was going to buy the UT120C again but then I saw the UT126C.
I think I will try the UT126C + Brymen leads.
 

Offline Monkeh

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The UT61E has 12 ohms in the mA range.  The UT126B with 1.3ohms is 9 times more accurate then!
(or the UT61E is 9 times less accurate...   :()

Burden voltage and accuracy are two entirely different things..
 

Offline hgg

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What happens then to accuracy when you have a high voltage drop
from internal resistance, when you measure low currents... ?
 

Offline Monkeh

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What happens then to accuracy when you have a high voltage drop
from internal resistance, when you measure low currents... ?

Nothing happens to the accuracy of the reading, only its relevance.
 

Offline hgg

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I think we are saying the same thing. 
The accuracy of each multimeter is fixed of course, but when you have a large burden voltage drop,
you have to account for that, otherwise the reading will not be so "accurate".
 

Offline Lightages

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The current being measured will be accurate but the voltage being supplied to the device will be affected and therefore the current measurement might not actually relate to what the device would use under normal voltage conditions, or the device might not function at all.

I am still working on my multimeter lead shootout but  can say that the Digitek leads are very good buys with gold plating, nice flexible and soft insulation, nice strain reliefs on each end, and low resistance. The only two drawbacks so far are the fairly dull tips and non-silicone insulation but still very flexible.

Yes the UT136X is very small and it is a great buy but if you are going to spend another $17 on leads then the DT2843R is a much better buy with temperature, True RMS AC+DC, back light, Relative function, Min/Max function, and has great leads included already in addition to what the UT136B offers.
 

Offline hgg

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Do you know if the leads supplied with the Digitek are exactly the same as these?

http://www.ebay.com/itm/Brymen-Silicone-Gold-Plated-Test-Leads-Probes-Multimeters-CAT-IV-1000V-/171162377470?pt=LH_DefaultDomain_0&hash=item27da129cfe

Quote
temperature, True RMS AC+DC, back light, Relative function, Min/Max
The UT136C has temperature and I saw in your video review of the UT136B that you
did rel out capacitance.  True RMS, back light and min-max I don't really need.
I need it to be compact and with a good frequency counter.
« Last Edit: January 10, 2014, 08:36:44 pm by hgg »
 

Offline Lightages

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The leads supplied with the Digitek are as shown on this page:
http://www.ebay.com/itm/Digitek-DT-2843R-AC-DC-True-RMS-Multimeter-Backlight-and-Temperature-/171080136251?pt=LH_DefaultDomain_0&hash=item27d52bb63b
They are Digitek leads not Brymen leads.


The only things you can rel on the UT136B is capacitance and resistance. They are also only autoranging until you do a rel function and then they stick in whatever range you rel'd on.
« Last Edit: January 10, 2014, 09:54:54 pm by Lightages »
 

Offline hgg

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I see.  Ok, thanks again.
 

Offline idpromnut

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Cheap'n'cheesy!  Bought!
 

Offline hgg

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Just received the Brymen probes from Franky.

http://www.ebay.com/itm/Brymen-Silicone-Gold-Plated-Test-Leads-Probes-Multimeters-CAT-IV-1000V-/171162377470?pt=LH_DefaultDomain_0&hash=item27da129cfe


Probes

Very nice quality.  Compared to the Fluke TL175 leads the silicone cables are just a bit thicker
and of similar quality.  No rating markings on them.  The stress relief of the Fluke is better.
The protection cups are nice and firm and the leads fit very nicely on the UT61E.

Measured with the UT61E their total resistance is 0.04 Ohm (1 meter per lead)
compared to the TL175 which is 0.08 Ohm (1.2 meters per lead).    Very nice!

Finally the gold plated tips are really nice and they take correct measurements with very
little pressure.  Great at continuity testing as well.

Only problem was that they arrived in a small package and consequently a lot of bends.

Overall a very nice set of leads.
I am still waiting for the UT136C from DX...
« Last Edit: January 23, 2014, 02:09:23 pm by hgg »
 

Offline Jasper

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Now why isn't the 136 range mentioned in the (2009, sheesh) catalog on the uni-t site or on their manual download page? Is it not yet in there and they're running very behind, or is it gone from there already?
 

Offline iloveelectronics

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Now why isn't the 136 range mentioned in the (2009, sheesh) catalog on the uni-t site or on their manual download page? Is it not yet in there and they're running very behind, or is it gone from there already?

Uni-T hasn't updated their English website for who-knows-how-long. Try their Chinese site: http://www.uni-trend.com.cn/cp.asp
My email address: franky @ 99centHobbies . com
My eBay store: http://stores.ebay.com/99centhobbies
 

Offline Lightages

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I was just going to post the same thing, but I will get you to the correct page:
http://www.uni-trend.com.cn/cp-show.asp?yy=%D6%D0%CE%C4&ProductNO=610
 

Offline Jasper

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I knew I was doing *something* wrong.

Still prefer the english catalog pdf as a format though :)
 

Offline hgg

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The UT136C just arrived!




First Impressions :

+ Nice sturdy construction, excellent LCD display.  Uni-T always uses very nice LCD displays!
+ I am using it with the Brymen leads from Franky.  Great combination.
   The leads that come with it are not of bad quality actually but they have a resistance of 0.15 ohms.
   Continuity testing with this combination is like a machine gun.  Instant.
+ Great frequency counter, fast and very sensitive.  That is actually the reason I've bought it.
+ Accurate and fast current measurements.
   Burden Resistance : 101 ohm @ uA, 1.84 ohm @ mA and 0.14 omhs @ A scales
+ Very positive feel on the dial, a bit stiff though.  No annoying beeping when changing modes.
+ Excellent tilt mount.  Stable.

- Probably the slowest resistance measurement I have seen in a multimeter.
  I thought I was measuring a large capacitor...  At least its accurate.
- 1.48V for diode measurement but fast.  Nothing great here.
  (Is it that difficult to make a proper diode tester?  !$@#$%)  21st century tech...
- Useless Hold button as usual.  Perfect for a backlight switch mod.
- Leads for temperature measurement complete junk!  Temperature sampling is fast
  but no decimal places.
- Placement of probe receptacles confusing.  A little red colour marking wouldn't hurt.
- (03 March 2014) Arrived 5mV out of calibration.  Fixed with adjustment of VR1 pot.


Overall a great little multimeter, especially for the price range. 
Perfect for my project because of its very fast sensitive and accurate frequency counter.
If you are measuring resistors frequently, look elsewhere.


The UT61E just gave birth to a cute little baby.   :)


Size Comparison

« Last Edit: March 03, 2014, 06:54:17 am by hgg »
 

Offline hgg

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Just blown the mA fuse of the UT136C while measuring current from a little motor.
Touched the spindle by accident while it was rotating...

I've replaced its fuse with a cheap one I had around, but now the mA burden resistance
went up from 1.84R to 3.84R.  While the A and uA are not really affected, the low voltage
mA measurements just became a lot worse now, just by using a crappy fuse with high
resistance.

Have you ever though about that?
Do you know the resistance of the fuses you are using?...

 

Offline Refrigerator

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Ohhh, can't wait to get mine !
My old Mastech is already starting to go all over the place when taking voltage readings, although it did well for the past 2 years...
Just started a blog at http://brimmingideas.blogspot.com/ . Not much in it as of now but more is sure to come :)
 

Offline s1m

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Hi, I just received a UT136C multimeter from gearbest but I have a problem with temperature reading. It always show OL. What does that mean? The probe is connected properly to the right slot. Maybe my multimeter is defective?
 

Offline Lightages

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More likely is that the cheap probe is defective.
 

Offline s1m

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Where can I get a good probe?
 

Offline Lightages

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There are probes available on ebay. The thing is you should get a replacement free from the seller of the UT136C. It is defective and they should replace it, not you.
 

Offline s1m

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I doubt gearbest will send me a probe for this.
I searched ebay but can't find the right probe for this. Will this one work? http://www.ebay.com/itm/DS18B20-Temperature-Temp-Sensor-Thermal-Probe-Thermometer-Waterproof-For-Arduino-/400805445386?hash=item5d51ddbf0a:g:40EAAOSweW5VG4tm
 

Offline xani

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Is leads always problem with those cheap meters ? Seems like every sub $25 I've saw or owned developed a problem with them after some time. I've got pair of http://en.axiomet.eu/product/axiomet/test-lead/ax-tlp-001/106 and they are well worth it, better than ones most $100+ meters.

They basically have very sharp tip that pokes thru isolated cover (so it is hard to short anything by accident) and after taking it of it fits nicely into standard banana socket
 

Offline s1m

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I found out what the problem with my 136c temperature meter. It was the fuse. It was burn out. I removed the fuse and bypassed it by soldering a copper wire. Also the fuse for the 10A meter was burn out. I also bypassed it with copper wire.
What would be the effect if i don't use a fuse for the 10A meter? Will this make the ampere reading not accurate?
 

Offline Refrigerator

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I found out what the problem with my 136c temperature meter. It was the fuse. It was burn out. I removed the fuse and bypassed it by soldering a copper wire. Also the fuse for the 10A meter was burn out. I also bypassed it with copper wire.
What would be the effect if i don't use a fuse for the 10A meter? Will this make the ampere reading not accurate?
Fuses are there to prevent damage, so don't leave your probe plugged in the amp socket.
Just started a blog at http://brimmingideas.blogspot.com/ . Not much in it as of now but more is sure to come :)
 

Offline Sredni

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WTF!
Yesterday my Uni-T UT136B arrived and... it has no HOLD function, it has the display backlight instead.
Counterfeit?

Anyone has one of these?
It says UT136B on the upper right of the instrument. But...  |O

Mmmmhhh... the pages for the specific variants of the UT136x are all down on UNI-T's website. The chinese one.
http://www.uni-trend.com.cn/productscatelist2_21_21_21_21.html

EDIT: The product pages are back, at least on the Chinese site.
Here's the 136B page: http://www.uni-trend.com.cn/productsdetail2.aspx?ProductsID=167&ProductsCateId=104&CateId=104
The picture clearly shows the HOLD button, and so does the manual.

UPDATED picture with lit display. "FLAME ON!!!"
« Last Edit: January 27, 2017, 01:21:51 pm by Sredni »
All instruments lie. Usually on the bench.
 

Offline Lightages

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I guess it is possible for someone to want to counterfeit a Uni-T. Anything is possible in China. It is also possible that Uni-T made a change to the meter but that seems illogical. The UT139 series is no longer listed on their website. Weird.
« Last Edit: January 25, 2017, 12:42:29 am by Lightages »
 

Offline ShockWomble

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WTF!
Yesterday my Uni-T UT136B arrived and... it has no HOLD function, it has the display backlight instead.
Counterfeit?

Anyone has one of these?
It says UT136B on the upper right of the instrument. But...  |O

Mmmmhhh... the pages for the specific variants of the UT136x are all down on UNI-T's website. The chinese one.
http://www.uni-trend.com.cn/productscatelist2_21_21_21_21.html

EDIT: The product pages are back, at least on the Chinese site.
Here's the 136B page: http://www.uni-trend.com.cn/productsdetail2.aspx?ProductsID=167&ProductsCateId=104&CateId=104
The picture clearly shows the HOLD button, and so does the manual.

I received the same today. I first thought the button was mislabelled and I'd been sent a factory reject.

The build quality seems good and the board inside looks legitimate enough to my untrained eye. The following is printed on the board.
UT136A/B (BL)
REV:00
2016.08.08

edit: I should confirm that the box and included operating manual both show the traditional HOLD button and functionality.
« Last Edit: January 24, 2017, 04:05:05 pm by ShockWomble »
 

Offline Rbastler

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I'm surprised that this meter is this good for the price.  :-+
Still, I preffer to spend around 20€ more and get a Fluke 101 from China.  ;)
http://rbastlerblog.jimdo.com/
Gamma spectrometer works. Now some yellow crystals need regenerating and testing.
 

Offline Lightages

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The Fluke 101 does not measure current. It is also twice the price or more. That is not a fair comparison. I would not buy a Fluke 101 for bench electronics. I would also not buy the Uni-T for anything that I was worried about my safety. My hands are worth more than 20€.
 

Offline Rbastler

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I carry a Fluke 101 in my backpack all the time. Nice, small, durable and reliable. I thought of buying a DMM with current measurment, but there was none I liked and "in the field" I hardly measure current. The 40€ I spend was worth the money to me. If you don't want to spend that amount of money, thats fine. Everyone has preferences and possibilitys regarding money.
As a benchmeter I woudn't use neither the Fluke 101 or the cheap UNI-T DMM. But as a beginner I surely would've preferd the UNI-T over the shit manual range DMM my local store has that cost even more then the UNI-T. I think it has its purpose in some narrow field, but if you aren't really short on money or a beginner and really need current measurment, I wound'nt buy it.
http://rbastlerblog.jimdo.com/
Gamma spectrometer works. Now some yellow crystals need regenerating and testing.
 
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Offline rsjsouza

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I got a UT136C for US$19.00 and Free shipping from Amazon. It is a Sinometer, but I hope it is a copycat of the Uni-T. I will send internal pictures after it arrives tomorrow.
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline ShockWomble

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Out of interest, I looked to see if there were any listings showing a backlight button and this morning I find this
http://www.ebay.co.uk/itm/UNI-T-UT136B-Auto-Range-Digital-Multimeter-AC-DC-Frequency-Resistance-Tester-/222383575612?hash=item33c718123c:g:fbgAAOSwjDZYfxPF
Quote
Uni-T UT136B
Description:
Warning: New Update, the "HOLD " Button Changed to"Backlight"Button
The instrument of this series UT136B is a small hand-held 3 1/2 (3999 counts) digital multimeter featuring stable,highly reliable and anti-drop performance. It is provided with a LCD display (49mm x 18mm) for clear reading. The circuit design takes LSI double integral A/D converter as its core under the protection of an overload protection circuit, making it a superior modern instrument. Moreover, It can be used to measure or test DC and AC voltage, DC and AC current, resistance, capacity, diodes and in-circuit continuity (buzzer) test. It is kind of basic function/ low cost Multimeter not with high accuracy.
Features:
Auto Power Off ; Low Battery Display; Diode Test; Continue Buzzer
Input Imp. For DC Voltage Measure: >= 10Mohm
Data ; Max. Display: 3999
Tilt stand design, three observation angles is in favor of reading display
High sensitivity AC / DC voltage DC current measurement
Fit for schools, factories, families, and amateur wireless lovers
Small and compact design
It is made of superior material, durable and practical
Specification:
Power: 9V Battery
Product Color: Red and Iron Grey
The max display: 3999
Work Environment: 0?-40?
Storage Environment: -10?-50?
Function: DCV,ACV,DCA,ACA ,Diode
Product Dimensions: (13.5 x 6.5 x 3.5)cm / (5.31 x 2.56 x 1.38)"(L x W x H)
Product Net weight: 315g / 11.11oz
Function:
mA range: F1 fuse 5x20mm, F 0.5A H 250V
10A range: F2 fuse 5x20mm, F 10A H 250V
(When <= 5A continuous measurement is allowed, when > 5A continuous measurement less than 10 seconds at an interval more than 15 minutes)
DC voltage : 400mV/4V/40V/400V/500V ;±(0.8%+1)
AC voltage : 400mV/4V/40V/400V/500V ; ±(1.2%+3)
DC current : 400uA/4mA/40mA/400mA/4A/10A ; ±(1.0%+2)
AC Current : 400uA/4mA/40mA/400mA/4A/10A ; ±(1.2%+5)
Resistance : 400ohm/4000ohm/40kohm/400kohm/4Mohm/40Mohm ; ±(1.0%+2)
Capacitance : 4nF/40nF/400nF/4uF/40uF/100uF ; ±(4.0%+3)
Frequency : 10Hz/100Hz/1kHz/10kHz/100kHz/1MHz/10MHz ; ±(0.5%+3)
Duty cycle : 0.1% ~ 99.9%
Frequency: 40Hz ~ 400Hz. Display effective value of sine wave(average value) each measurement is applicable from 5% of range as reference.
Closer Look: 
Warning: New Update, the "HOLD " Button Changed to"Backlight"Button

It seems a nice backlight to me. No timeout on it as far as I am aware and, bar the hot spot at the far right, it's evenly lit.
« Last Edit: January 27, 2017, 08:46:10 am by ShockWomble »
 

Offline rsjsouza

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I just got the Sinometer. It is built like a tank and it has the "Hold" button.

The preliminary tests show a very similar performance as in Lightages' video.

A friend from work just bought one after I showed him mine. It is spreading! :)
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline Lightages

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A change to a back light is a great change! A button for hold is a waste of space and money spent on the button.
 

Offline kcbrown

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I got a UT136C for US$19.00 and Free shipping from Amazon. It is a Sinometer, but I hope it is a copycat of the Uni-T. I will send internal pictures after it arrives tomorrow.

It's now $15 with free shipping.   :o

I just couldn't pass that up.

Oh, and all you need to do in order to get the probes to work well is to get some ultra-fine sandpaper (e.g., 1000 grit.  I used 600 grit myself and it worked a treat) and go over the entire surface of the metal probe tips with it, including the point itself.  This massively improves the contact reliability of the probes, and seems to bring them up to par with gold-plated tips for contact reliability (though the probe resistance is still higher than the best probes, almost certainly due to the choice of materials).  Neither standard contact cleaner (haven't tried DeoxIT) nor IPA did anything to improve that.
« Last Edit: February 21, 2017, 08:22:53 pm by kcbrown »
 

Offline rsjsouza

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I finally got around to shoot a picture from the interior of the Sinometer UT136C. The build quality is very similar to the UNI-T, including the nice battery protection and the nice housing.

It's now $15 with free shipping.   :o

I just couldn't pass that up.
I saw that. Incredible.

Oh, and all you need to do in order to get the probes to work well is to get some ultra-fine sandpaper (e.g., 1000 grit.  I used 600 grit myself and it worked a treat) and go over the entire surface of the metal probe tips with it, including the point itself.  This massively improves the contact reliability of the probes, and seems to bring them up to par with gold-plated tips for contact reliability (though the probe resistance is still higher than the best probes, almost certainly due to the choice of materials).  Neither standard contact cleaner (haven't tried DeoxIT) nor IPA did anything to improve that.
I don't have such fine grit sandpaper with me, but yesterday I tried DeoxIT D5 and some vigorous rubbing with a paper towel gave a lot of improvement - not yet ideal given the continuity is still very scratchy, but perfectly usable.
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline Lightages

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Please, PLEASE, do not use sandpaper on probes. The probes usually are some kind of chrome or nickel plated onto cheaper metal like brass. Using sandpaper removes the plating and will make them prone to corrosion and constantly failing to make good contact. Usually what is preventing the probes from making good contact is residue from the molding process. The process can leave a very thin film of plastic/rubber/silicone or mold release on the surface of the probes. This needs to be removed without damaging the plating.

Instead, use fine steel wool and rub the probes with a bit of alcohol or some other solvent. This should remove the insulating coating without doing too much damage to the plating.
 

Offline kcbrown

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Please, PLEASE, do not use sandpaper on probes. The probes usually are some kind of chrome or nickel plated onto cheaper metal like brass. Using sandpaper removes the plating and will make them prone to corrosion and constantly failing to make good contact. Usually what is preventing the probes from making good contact is residue from the molding process. The process can leave a very thin film of plastic/rubber/silicone or mold release on the surface of the probes. This needs to be removed without damaging the plating.

Instead, use fine steel wool and rub the probes with a bit of alcohol or some other solvent. This should remove the insulating coating without doing too much damage to the plating.

This has me wondering if they can be re-coated with something that would conduct well and which would still protect them.  Might be more trouble than it's worth.

Fortunately, these are cheap probes.  I've already applied this process to a couple of pairs that I got with UNI-T meters, but if they fail, replacing them is inexpensive (about $1.25 on eBay).

In any case, if the sandpaper you're using is sufficiently fine and you do it carefully enough, you might well end up removing the coating without damaging the plating enough to matter.  Tough to say.
« Last Edit: February 24, 2017, 12:10:30 am by kcbrown »
 

Offline RissViss

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Where is a good place to purchase the UT136B and UT61E and have shipped to Canada. I have looked on Aliexpress ebay and amazon, was wondering if there are places with better prices or places to stay away from?
Thanks
Have a day

 

Offline SkyMaster

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I guess it is possible for someone to want to counterfeit a Uni-T. Anything is possible in China. It is also possible that Uni-T made a change to the meter but that seems illogical. The UT139 series is no longer listed on their website. Weird.

The UT136 series is not shown on the English Uni-T website, but it is still on the Chinese Uni-T website - http://www.uni-trend.com.cn/searchlist.aspx?submit.x=24&submit.y=20&KeyWord=136

The pictures are showing "Hold" buttons.
 

Offline Malefoda

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The UT136C just arrived!
...
- (03 March 2014) Arrived 5mV out of calibration.  Fixed with adjustment of VR1 pot.


Hi fellows,
anyone with the trimpots assignment? The temp is way off and I want to get in in the ballpark of my Fluke 179 and other stuff I got here.
Thanks!
 

Offline osteichthyes

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Just wanted to chime in, this looks almost identical to the GW Instek GDM-350B, but that is manual ranging, and it has a power button. Everything else looks identical. I actually really like  it, I leave it connected to a DC supply, and just leave it in the 20VDC range, the power button makes it super easy. And, it was $8 when it was discontinued!
 

Offline rsjsouza

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A bit of necroposting... Uni-T re-cooked the UT136 and is now selling its "improved" UT136B+ and UT136C+ versions on a larger size, claiming it is 2m drop tested and with a transistor tester.

http://www.uni-trend.com/productsdetail_2468_1535_1535.html

Oh well... Until one is opened up and tore down, I will hold my recommendations for this meter, though.  :palm:
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 
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Online 001

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A bit of necroposting... Uni-T re-cooked the UT136 and is now selling its "improved" UT136B+ and UT136C+ versions on a larger size, claiming it is 2m drop tested and with a transistor tester.

http://www.uni-trend.com/productsdetail_2468_1535_1535.html

Oh well... Until one is opened up and tore down, I will hold my recommendations for this meter, though.  :palm:

No
It is totally new units  :-//
 


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