Author Topic: Super Ultra stable Aneng 8008  (Read 2096 times)

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Offline Free_WiFi

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Super Ultra stable Aneng 8008
« on: September 29, 2019, 12:18:19 am »
Just replace the electrolytic caps on the filter for the digital ADC with 6 ceramic smd caps 96nf each + 1 tantalum 630uf
« Last Edit: September 29, 2019, 01:15:37 am by Free_WiFi »
 
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Offline Free_WiFi

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Re: Super Ultra stable Aneng 8008
« Reply #1 on: September 29, 2019, 12:30:23 am »
The only 1 problem with this multimeter is the mechanical switcher :(
Basically when i'm going to set the Ohm range i need to not miss the perfect spot for the switcher,because the multimeter will play with random numbers ...
So basically at this point i still need to check the switcher and see what's going on there.
« Last Edit: September 29, 2019, 12:35:04 am by Free_WiFi »
 
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Offline Free_WiFi

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Re: Super Ultra stable Aneng 8008
« Reply #2 on: September 29, 2019, 01:01:34 am »
SMART TWEEZERS LCR Meter Model ST5S VS Aneng 8008 with replaced caps on ADC
 

Offline trobbins

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Re: Super Ultra stable Aneng 8008
« Reply #3 on: September 29, 2019, 06:16:04 am »
I'm unsure what you are improving, as you haven't identified a problem or defined it. 

Why is this thread called 'super ultra' - when there is no benchmark or reference test of stability?  Do you mean it is just has a stable display?

Are you just applying extra filtering to the battery dc supply to the chip?  If you want to do that appropriately then you need to apply the filtering as close to the chip as possible.

 
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Offline CDaniel

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Re: Super Ultra stable Aneng 8008
« Reply #4 on: September 29, 2019, 07:02:23 am »
I don't want to be mean , but at the end of the day is just a very cheap chinese multimeter , whatever you do ... better then others cheap multimeters but that's about it .
 

Offline trobbins

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Re: Super Ultra stable Aneng 8008
« Reply #5 on: September 29, 2019, 07:50:01 am »
Well it is a very accurate meter for some types of testing and far exceeds the accuracy I often need, and I would typically round down the digits if I was to record certain measurements.  And it is very convenient when I can connect 2 or 3 meters to equipment to know what is going on as things change, and that can reduce the risk of continuously having to swap probe positions to confirm status or make changing measurements.  And it's effectively 'free' - so at the end of the day it is a meter and a very convenient meter to have a few on hand at the bench.
 

Offline Free_WiFi

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Re: Super Ultra stable Aneng 8008
« Reply #6 on: September 29, 2019, 09:23:28 am »
I have made this topic,because a lot of users which own's this dmm have the same common problem regarding the slowness and random reading on the Ohm range.
So basically there is noting of wrong if i call my topic Super ultra stable aneng especially when i've fixed it's childish sickness from factory.
 :-+
« Last Edit: September 29, 2019, 09:27:23 am by Free_WiFi »
 

Online Fungus

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Re: Super Ultra stable Aneng 8008
« Reply #7 on: September 29, 2019, 10:19:29 am »
This was done ages ago:

https://hackaday.com/2017/11/24/a-few-caps-for-a-faster-multimeter/

There's a whole thread about modding these meters on here somewhere but I can't find it.  :(

Good to keep the idea alive though, never forget!
« Last Edit: September 29, 2019, 10:27:45 am by Fungus »
 
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Offline Free_WiFi

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Re: Super Ultra stable Aneng 8008
« Reply #8 on: September 29, 2019, 10:37:41 am »
This was done ages ago:

https://hackaday.com/2017/11/24/a-few-caps-for-a-faster-multimeter/

There's a whole thread about modding these meters on here somewhere but I can't find it.  :(

Good to keep the idea alive though, never forget!

Yes! i'm perfectly aware of that,but in any case after my so called "RESEARCHes" i found that ceramics or tantalum caps are the the best for this kind of task and this is because the electrolytic caps tend to jam the measurments.
This effect is caused due charge/discharge after you turn on or off this particular model of DMM.
« Last Edit: September 29, 2019, 10:42:55 am by Free_WiFi »
 
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Offline trobbins

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Re: Super Ultra stable Aneng 8008
« Reply #9 on: September 29, 2019, 12:07:25 pm »
electrolytic caps tend to jam the measurments.
Is this what you and others have observed?  What is the actual observation?
I've never had anything abnormal happen with just an electrolytic as filter.
« Last Edit: September 29, 2019, 12:26:42 pm by trobbins »
 

Offline Free_WiFi

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Re: Super Ultra stable Aneng 8008
« Reply #10 on: September 29, 2019, 12:17:42 pm »
Is this what you and others have observed?  What is the actual observation?
I've never had anything abnormal happen.
Maybe because my electrolitycal caps are bad or whatsoever,btw my multimeter with electrolytical caps do bouncing measurements and can't never settle to some point
 

Offline GigaJoe

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Re: Super Ultra stable Aneng 8008
« Reply #11 on: September 29, 2019, 04:26:13 pm »
the next step would be replace 4M oscillator
my stable with 12 ( if i remember right) , caps measure you need to divide :) and beeper sound too thin ... ; but it really fast now

i have another one it works with 24M ( was 4M), super fast,  i use it to probe resistors ....  an auto range count down in a blink ...

upd:  TO-92 are Vref,  next to are small cap shunt, that not enough,    so 1-10uf tant.  would be much better ....
« Last Edit: September 29, 2019, 05:22:37 pm by GigaJoe »
 
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Offline 001

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Re: Super Ultra stable Aneng 8008
« Reply #12 on: October 12, 2019, 09:20:32 am »
sorry for necroposting
but no new posts about anangs
why?

is it became common gear now or nobodys use it?
 

Offline Gyro

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Re: Super Ultra stable Aneng 8008
« Reply #13 on: October 12, 2019, 11:06:14 am »
Because there's nothing else to say about it?
Chris

"Victor Meldrew, the Crimson Avenger!"
 

Offline 001

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Re: Super Ultra stable Aneng 8008
« Reply #14 on: October 12, 2019, 11:20:47 am »
Because there's nothing else to say about it?

is it bad or good?
 

Online ThickPhilM

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Re: Super Ultra stable Aneng 8008
« Reply #15 on: October 12, 2019, 11:40:18 am »
Good for electronics hobbyists who never go above 24vdc or so, bad for anything more serious.
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Offline tooki

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Re: Super Ultra stable Aneng 8008
« Reply #16 on: October 12, 2019, 10:54:47 pm »
sorry for necroposting
but no new posts about anangs
why?

is it became common gear now or nobodys use it?

It’s not necroposting to reply to a thread that is just 2 weeks old!!! That’s barely a nap!

The unrelated question, however, is a faux pas.
 

Offline blueskull

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Re: Super Ultra stable Aneng 8008
« Reply #17 on: October 12, 2019, 11:16:43 pm »
Good for electronics hobbyists who never go above 24vdc or so, bad for anything more serious.

Even CAT II 300V should be good enough for 99% residential applications.
The demand for a higher CAT, higher voltage meter is greatly overhyped.

FYI, your common household electronics are rated CAT II, 300V (2.5kV transient identified by IEC60950-1).
If you don't expect a power brick to explode without a reason, you don't expect this thing to explode.

The only difference is, if this thing explodes, it explodes in your hand. But on the other hand, it's only connected to mains briefly, not 24/7.
I would totally be confident to poke 220V with a CAT II 300V meter.

It's way more dangerous to use a metal smartphone/computer while being charged from a CAT II 300V rated charger, which is what I do all the time.

I also call the creed to HRC fuses bullshit. The only time an HRC use is needed is when you accidentally poked your current input to high voltage WHILE THERE IS A TRANSIENT.
Just imagine the possibility. How much a chance there is for you to catch that elusive 8/20us transient providing you will anyway withdraw the test leads if you short an AC mains?

Shorting the AC alone without a transient is not that dangerous, at least not for single phase (<=240V) residential voltage after AFCI/GFCI panel.
Unless you live in a Scandinavian country, chances you get 3P ~400V (which can get you serious arc burning) to your house is pretty low.

There are truly bad meters like those 830B, which will catch on fire just from selecting wrong mode, even if input is within its rated voltage.
But other than that, I don't consider any meter dangerous if used with only residential (after breaker) applications -- as long as it reads a voltage when the input is hot.
 
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Online maginnovision

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Re: Super Ultra stable Aneng 8008
« Reply #18 on: October 13, 2019, 01:55:37 am »
I don't even think these are that dangerous because they usually fail on me as soon as they're near mains voltages. How long are you going to play with mains when your meter is busted?
 

Offline trobbins

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Re: Super Ultra stable Aneng 8008
« Reply #19 on: October 13, 2019, 08:55:34 am »
I go well above 24Vdc with my Aneng AN8009 for valve amp benchwork. I don't use it for mains side measurements.  There are a myriad diy applications where it is an excellent general purpose multimeter. 

The comment that it is only useful below 24Vdc is naive.
« Last Edit: October 13, 2019, 08:57:43 am by trobbins »
 
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Offline Gandalf_Sr

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Re: Super Ultra stable Aneng 8008
« Reply #20 on: October 13, 2019, 09:54:41 am »
I own the Aneng 8008 and I've added better MLCC capacitors and noticed that does seem to improve the stability/settling. I also calibrated it against my 34461A and bought a set of gold-plated leads for it that cost almost as much as the meter.

It's accurate and the display is VERY easy to read.  I use it a lot to track voltages on small 3.3V or 5V embedded projects.
I'd like to make the world a better place but they won't give me the source code
 

Online ThickPhilM

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Re: Super Ultra stable Aneng 8008
« Reply #21 on: October 13, 2019, 03:05:53 pm »
I go well above 24Vdc with my Aneng AN8009 for valve amp benchwork. I don't use it for mains side measurements.  There are a myriad diy applications where it is an excellent general purpose multimeter. 

The comment that it is only useful below 24Vdc is naive.


You're deliberately misquoting me, but w/e

If you want to trust your bodily integrity to a sub-par piece of equipment, that's your choice. It isn't mine.

@blueskull, about HRC fuses, if you think you only need those for safely measuring things on your domestic line supply or higher, you should be aware that ELV DC arcing is as dangerous, and is likely to have lower impedance where it's likely to occur.

FYI I have a couple of Chinesium meters, and they are damn useful, a UNI-T UT139C and a Mastech MS2108A, the latter of which has an unparalleled (for the money) 40ADC current clamp range, which is accurate to +/-1 lsd compared with a 1% tolerance shunt.

The UT139 does at least have HRC fuses, but I'd still rather use one of my better quality meters to measure something that has the potential to harm me.

In a little over 40 years of sticking various probes in dubious places, I've only killed 1 meter (UT61), and that was when I dropped some pliers on it and broke the LCD  |O
(though I have blown quite a few fuses)
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Offline 001

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Re: Super Ultra stable Aneng 8008
« Reply #22 on: October 13, 2019, 03:48:01 pm »

-
Ok
What You can say about UT139C vs UT61E?
 

Offline tggzzz

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Re: Super Ultra stable Aneng 8008
« Reply #23 on: October 13, 2019, 04:02:41 pm »
sorry for necroposting
but no new posts about anangs
why?

is it became common gear now or nobodys use it?

It’s not necroposting to reply to a thread that is just 2 weeks old!!! That’s barely a nap!

The unrelated question, however, is a faux pas.

It is just 001 being 001. Have a look at the threads he's started :(

It makes me wish for a sub-threaded interface where I could ignore anything 001 posts, plus all replies to his posts - but still see anything other (most) other people post.
There are lies, damned lies, statistics - and ADC/DAC specs.
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Online Fungus

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Re: Super Ultra stable Aneng 8008
« Reply #24 on: October 13, 2019, 04:17:46 pm »
It is just 001 being 001. Have a look at the threads he's started :(

Yep.


-
Ok
What You can say about UT139C vs UT61E?

 :scared:
 


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