Author Topic: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter  (Read 126247 times)

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Offline stj

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #750 on: June 23, 2018, 09:46:20 pm »
the aneng meters can be modded for 20mm fuses.
and you can get ceramic 20mm FF rated fuses - so that's the way to go.
 
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Offline Zimphire

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #751 on: June 28, 2018, 12:30:47 pm »
I've read a good 20 or so pages of this. While it's not the best DMM on the planet, for the price it's perfect for what I need it for. Better than anything in that price range a few years back.

And after doing this mod to it, and getting better probes, it works even better.

https://www.jackenhack.com/aneng-an8008-modify-for-better-accuracy-faster-readings/
 
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Offline bitseeker

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #752 on: June 29, 2018, 07:54:10 am »
Welcome to the forum, Zimphire.

Interesting how much noise was in the meter and how much better performance was after Jack made those cap mods.

Looks like he recently fixed up the AN8009 as well. https://www.jackenhack.com/aneng-an8009-improve-accuracy-response/
« Last Edit: June 29, 2018, 08:29:38 am by bitseeker »
You don't acquire TEA. It acquires you.
 
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Offline tooki

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #753 on: June 30, 2018, 05:04:21 am »
Welcome to the forum, Zimphire.

Interesting how much noise was in the meter and how much better performance was after Jack made those cap mods.

Looks like he recently fixed up the AN8009 as well. https://www.jackenhack.com/aneng-an8009-improve-accuracy-response/
Zimph, from MacNN forums, is that you?! :P Blast from the past!!!
 

Offline Zimphire

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #754 on: July 15, 2018, 05:54:04 pm »
Zimph, from MacNN forums, is that you?! :P Blast from the past!!!

Ack! PLZ don't ban me!
 

Offline tooki

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #755 on: July 16, 2018, 12:33:43 am »
Zimph, from MacNN forums, is that you?! :P Blast from the past!!!

Ack! PLZ don't ban me!
Hahaha I’m not an admin here. And you deserved it! ;) Anyway, nice to see a familiar face (well, username!).
 

Offline lordvader88

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #756 on: July 16, 2018, 09:31:49 am »
Wasn't there something very common missing on these like mA ability, just Amps ?
 

Offline floobydust

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #757 on: July 16, 2018, 11:17:24 am »
Wasn't there something very common missing on these like mA ability, just Amps ?

Full featured DMM's using this chipset have a fouth input jack: COM, V, mA/uA, A

AN8008 has three and is missing the low mA range, it has uA, high mA + A. So it reads:

0-99.99uA at the V jack with 100R shunt.
0-999.9uA at the V jack with 100R shunt.
0-999.9mA at the A jack with 0.01R shunt
0-9.999A  at the A jack with 0.01R shunt

Missing is the 9.999mA/99.99mA range with 0.99R shunt.

So you can only get 0.1mA resolution on mA measurements.

Also, it cannot measure past 9.999MEG ohms  :--
 

Online Fungus

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #758 on: July 16, 2018, 08:36:49 pm »
Wasn't there something very common missing on these like mA ability, just Amps ?

Yes. They don't have a range in the 10mA area. They jump straight from uA to A.
 

Online exe

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #759 on: July 16, 2018, 08:54:40 pm »
I like having only three jacks -- that's convenient for me. But I'd love to have an audible warning if plug not in the right socket.
 

Offline stj

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #760 on: July 16, 2018, 10:25:33 pm »
I like having only three jacks -- that's convenient for me. But I'd love to have an audible warning if plug not in the right socket.

you do, it makes a bang or large crack sound!  >:D
 
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Online exe

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #761 on: July 16, 2018, 11:41:39 pm »
you do, it makes a bang or large crack sound!  >:D

Considering the DMM itself costs just a bit more than a good HRC fuse, that's fine with me :). A single-use DMM...

PS could you remind me why it should bang? I thought it has fuses on all ranges...
 

Offline JanJansen

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #762 on: July 17, 2018, 12:30:13 am »
How long does it take before a 99.999 counts meter is to be released for this price ?
aliexpress parachute
 

Online exe

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #763 on: July 17, 2018, 12:59:49 am »
How long does it take before a 99.999 counts meter is to be released for this price ?

You mean a 5-digit DMM for $15? Well, if you only care about number of digits it's not a problem at all :D. A 16-bit sound DAC with some oversampling will do it... But precision will suffer.
 

Offline wolferl1210

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #764 on: August 01, 2018, 12:37:41 am »
I want to make the mods to my AN8008 according to the info at:
https://hackaday.com/2017/11/24/a-few-caps-for-a-faster-multimeter/

It's the first time that I re-solder SMD, but a do have a lot of experince in soldering.
I use a solder ATTEN ST-80 station with temp setting, so what temp should I use for the 0805 caps?
Is the tip (attached pic) OK for that job?

Thanks for your advise in advance!

 

Offline ebastler

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #765 on: August 01, 2018, 02:12:08 am »
It's the first time that I re-solder SMD, but a do have a lot of experince in soldering.
I use a solder ATTEN ST-80 station with temp setting, so what temp should I use for the 0805 caps?
Is the tip (attached pic) OK for that job?

That tip looks like something my dentist would use...  ;)

If you have a pencil or fine chisel tip for your normal through-hole soldering, there is no need to buy a special one for soldering 0805 SMDs. The same considerations apply as for through-hole soldering: The tip needs to be fine enough to touch the desired solder joint only, but shold not be thinner than necessary (for good heat transfer). Just hold your pencil or chisel tip into the angle beween PCB and the side wall of the 0805, and you will be fine.

Also, your temperature setting should be the same as for small through-hole components.
 
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Offline stj

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #766 on: August 01, 2018, 04:09:48 am »
you do, it makes a bang or large crack sound!  >:D

Considering the DMM itself costs just a bit more than a good HRC fuse, that's fine with me :). A single-use DMM...

PS could you remind me why it should bang? I thought it has fuses on all ranges...

that's a common miss-understanding.
meters only have fuses on the current inputs.
 

Online In Vacuo Veritas

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #767 on: August 01, 2018, 05:26:07 am »

that's a common miss-understanding.


Oh I think I met her once.

("miss-understanding"? Really? You guys invented the language, not sure what you're doing with it these days, though.)
 

Offline Zimphire

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #768 on: August 01, 2018, 09:33:33 am »
Buying better test leads also makes this DMM alot better..
 
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Offline stj

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #769 on: August 01, 2018, 11:52:32 pm »

that's a common miss-understanding.


Oh I think I met her once.

("miss-understanding"? Really? You guys invented the language, not sure what you're doing with it these days, though.)

shouldnt you be speaking french?  >:D
 

Offline GreyWoolfe

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #770 on: August 02, 2018, 02:46:34 am »
Buying better test leads also makes this DMM alot better..

+1 for this.  I replaced the leads on my Aneng 8009 in my toolbag with Brymen gold plated leads.  Much more accurate for the low resistance measurements I will be using it for.  I threw the OEM leads out.
Why do people who know the least know it the loudest?
 

Offline jackenhack

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #771 on: September 21, 2018, 05:58:28 am »
Welcome to the forum, Zimphire.

Interesting how much noise was in the meter and how much better performance was after Jack made those cap mods.

Looks like he recently fixed up the AN8009 as well. https://www.jackenhack.com/aneng-an8009-improve-accuracy-response/

I've got a lot of responses from people doing the upgrade on the AN8009 and not getting any significantly better results. I did on my unit, but maybe they've improved later batches.
 

Offline Mr. Scram

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #772 on: September 21, 2018, 09:40:24 am »
Buying better test leads also makes this DMM alot better..
One thing that lets the Anengs down compared to "real" multimeters is the wobbly lead sockets.
 

Offline stj

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #773 on: September 21, 2018, 10:10:29 am »
strange, i have 2 and they arent wobbly or loose in any way.
 

Offline Mr. Scram

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Re: AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
« Reply #774 on: September 21, 2018, 10:41:52 am »
strange, i have 2 and they arent wobbly or loose in any way.
The sockets are only attached on the bottom and soldered to the PCB through a long springy connector. It's inevitable that leads that don't neatly fill the gap produce a lot of force on that bottom bit due to them essentially being levers. The supplied leads and maybe the often used Brymen leads seem to fill the gap between the socket and the case and stabilise the whole affair that way, though you can still wiggle the leads from side to side a bit. With the original leads the range of motion is much closer to higher end meters, though.

It should be said that higher end leads also don't seem to be firmly held inside the socket.
 


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