Super Ultra stable Aneng 8008

[Free_WiFi]

Just replace the electrolytic caps on the filter for the digital ADC with 6 ceramic smd caps 96nf each + 1 tantalum 630uf

[Free_WiFi]

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.

[Free_WiFi]

SMART TWEEZERS LCR Meter Model ST5S VS Aneng 8008 with replaced caps on ADC

[trobbins]

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.

[CDaniel]

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 .

[trobbins]

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.

[Free_WiFi]

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.
 

[Fungus]

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!

[Free_WiFi]

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.

[trobbins]

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.

[Free_WiFi]

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

[GigaJoe]

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 ....

[001]

sorry for necroposting
but no new posts about anangs
why?

is it became common gear now or nobodys use it?

[Gyro]

Because there's nothing else to say about it?

[001]

Because there's nothing else to say about it?

is it bad or good?

[AVGresponding]

Good for electronics hobbyists who never go above 24vdc or so, bad for anything more serious.

[tooki]

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.

[maginnovision]

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?

[trobbins]

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.

[Gandalf_Sr]

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.

[AVGresponding]

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 
(though I have blown quite a few fuses)

[001]

-

Ok
What You can say about UT139C vs UT61E?

[tggzzz]

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.

[Fungus]

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?

 

[AVGresponding]

Ok
What You can say about UT139C vs UT61E?

Well, its model number is more than twice as big, so I'm guessing it's more than twice as good 

[MiroS]

The most stable Aneng 8008 is dead one or one in recycle trash. You cannot make it  safe.

[trobbins]

What a woeful and worthless comment - no technical content, no actual observations.

[001]

What a woeful and worthless comment - no technical content, no actual observations.

Yea
It is typical Myros comment
He hate all asian gear

[AVGresponding]

Those 1808 SMT fuses might fail under a direct 60V short, but that arc won't be much longer, meaning your hand should be able to withdraw the probes easily far away from arc's maximum length.
For those cheap meters, I really can't care if it survives an arc flash, what I care most is if the operator survives.

When I say arc burning, I mean those super hot, super long arcs that can heat air to explosion and burn the operator. I just can't see 60V doing such damage.
Of course, I've never shorted 60V. The highest voltage (with unlimited current, such as a battery) I've ever shorted is 24V (floating at ~28V), and it's really not a big deal other than a brief flash. Couldn't even feel the heat.

FYI, my way of keeping meters from blowing up is not to measure current at all. My daily driver (a pocket "credit card" meter) doesn't even have a current jack.
Whenever possible, when I design a test setup, I have current sensors built in, so I only have to probe voltage, not current.
I do have meters that are safe and can measure current, but I usually find measuring voltage safer.

Yeah, I was thinking more along the lines of a nominal 48VDC system, like they used to use in big telecoms switches.
The float voltage in those was around 54V or so, and you'd be amazed at the potential energy. I saw some clips a while back on various short testing they did, it was pretty impressive, and incredibly destructive   
I'll see if I can dig them out and link them in.

Some of the UPSs I've worked on have batteries with over 400VDC and a nominal Wh rating of around 400000 or so. Needless to say, I was super careful when working on those   

[AVGresponding]

Here we go, hope you find it as interesting as I did!

54V DC Battery Short Circuit

[Gandalf_Sr]

Many moons ago, I worked at an old Strowger telephone exchange in the UK which had a BIG room full of single-cell lead-acid batteries, each about 3 x 3 x 4 feet wired to give 50V with big copper bus bars about 2 x 1 inches feeding through a hole in the wall.  One day someone dropped a large wrench which landed across the bus bars and created a large flash and bang; we ran across the room to see what had happened and there were 2 ends of the wrench welded to the bus bars with the center part drooped on either side and blown out like a fuse.  The exchange kept running although I expect there was a click on people's phone conversations.

I would not use my AN8008 for 400 volt work, the CAT info printed on the case is pure fiction IMHO.

[Gandalf_Sr]

Here we go, hope you find it as interesting as I did!

54V DC Battery Short Circuit

Not exactly non-destructive testing eh?

[rsjsouza]

Here we go, hope you find it as interesting as I did!

54V DC Battery Short Circuit

Pretty interesting clip. Thanks for sharing. At 4 minute mark, the gassing is a deadly spectacle.

The first time I saw impressive low voltage but high energy circuits was during the ultracapacitor frenzy - a video from Afrotechmods was quite interesting to watch.

https://youtu.be/EoWMF3VkI6U

That shows one thing: for professional environments use professional tools. For hobby uses regular tools are ok, unless one ventures into professional territory. Making the distinction is key.

[Fungus]

Just make triple-sure the cable is in the volts socket and the switch is set to measure voltage and you'll be fine... 

[001]

Just make triple-sure the cable is in the volts socket and the switch is set to measure voltage

interesting idea