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Electronics => Repair => Topic started by: SpyTattoo on January 11, 2018, 09:22:22 pm

Title: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: SpyTattoo on January 11, 2018, 09:22:22 pm
AN8002 failed on testing continuity no beep, sometimes show resistance value(53 ohm). If i testing on diode still work perfactly.

Do someones have experience for this error of multi-meter.

Thanks in advance.
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: floobydust on January 11, 2018, 09:25:28 pm
Spin the rotary switch a few times, it might be oxide on the switch.
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: SpyTattoo on January 11, 2018, 09:52:48 pm
I already do it many times but it's not work. Try to change both probe too but no luck.

Thanks for reply.

Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: retiredcaps on January 11, 2018, 10:49:56 pm
I don't have this meter, but maybe take it apart and look for any obvious signs of problems?  Bad soldering, some debris inside?

I suspect the cost of returning this meter to whereever, unless locally, you bought it will be more than the cost of the meter?
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: stj on January 11, 2018, 10:50:32 pm
it wont beep if it's over 50ohms.

put a wire between the sockets incase the leads are bad.
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: RayRay on January 11, 2018, 10:53:19 pm
Quote from: SpyTattoo on January 11, 2018, 09:52:48 pm
Try to change both probe too but no luck.
You mean you've literally changed em, or only switched their positions? Just wanna verify I got it right (as your English isn't the greatest)
Anyhow, provided you did try different probes, I'd say it's either a faulty buzzer, a bad solder joint, or a faulty component.
You'd have to open it up and have a good inspection (and possibly some testing with another DMM) to get more insight.
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: stj on January 12, 2018, 01:48:52 am
well the buzzer should beep when you turn it on or switch ranges/modes
so that's easy to test.  :)
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: Electro Detective on January 12, 2018, 03:03:30 am
Maybe the internal fuse is wacked out,

I fixed a similar cheapie meter the other day that has shared 200ma current and V  \$\Omega\$  socket

The fuse looked ok but failed on the test

Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: SpyTattoo on January 12, 2018, 09:44:19 pm
Could you please tell me where is internal fuse?

Many Thanks..
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: barry14 on January 12, 2018, 09:58:42 pm
The fuses are the 2 components at the bottom of the board labeled F1 and F2.
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: Armadillo on January 13, 2018, 07:07:37 am
Have you Re-solder the connector sockets and joints?
Flimsy board can't take mechanical stresses.
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: Electro Detective on January 13, 2018, 09:48:05 am
My money is on the 600ma fuse on the left gone zapski...

If it is blown, where is OP SpyTattoo going to get one of those halfassed circus sideshow midget fuses with the correct value of 600ma?  :-//

What were they smoking at the ANENG design (save money) meeting for this meter?   :palm:
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: amspire on January 13, 2018, 10:02:31 am
You can buy the correct fuses from the Richmeter (Aneng clone) store on Aliexpress provided you have bought a multimeter from the store. Otherwise, they wont sell the fuses.


https://www.aliexpress.com/store/product/10A-600uA-fuse-for-RM101-102-multimeter/909123_32811804077.html? (https://www.aliexpress.com/store/product/10A-600uA-fuse-for-RM101-102-multimeter/909123_32811804077.html?)

So, for example, you can get a RM100 (Aneng 8001 clone) for US$14 and then you can buy the genuine fuses.

https://www.aliexpress.com/store/product/RICHMETERS-RM100-Multimeter-4000-counts-Back-light-AC-DC-Ammeter-Voltmeter-Ohm-9-999MHz-Frequency-Diode/909123_32794255455.html? (https://www.aliexpress.com/store/product/RICHMETERS-RM100-Multimeter-4000-counts-Back-light-AC-DC-Ammeter-Voltmeter-Ohm-9-999MHz-Frequency-Diode/909123_32794255455.html?)

This is the Aneng8009 clone:
https://www.aliexpress.com/store/product/RM111-NCV-True-RMS-Digital-Multimeter-Auto-Range-9999-counts-100M-Ohm-Temperature-Back-light-AC/909123_32835638876.html (https://www.aliexpress.com/store/product/RM111-NCV-True-RMS-Digital-Multimeter-Auto-Range-9999-counts-100M-Ohm-Temperature-Back-light-AC/909123_32835638876.html)

You can also get 1A and 10A fuses and cut the leads of:

https://www.ebay.com.au/itm/10Pcs-Ceramic-Tube-Fuse-Metal-Axial-Lead-Slow-Blow-Type-Fuse-3-6x10mm-250V-1A/282671916075 (https://www.ebay.com.au/itm/10Pcs-Ceramic-Tube-Fuse-Metal-Axial-Lead-Slow-Blow-Type-Fuse-3-6x10mm-250V-1A/282671916075)
https://www.ebay.com.au/itm/10Pcs-Ceramic-Tube-Fuse-Metal-Axial-Lead-Slow-Blow-Type-Fuse-3-6x10mm-250V-10A/292272152527 (https://www.ebay.com.au/itm/10Pcs-Ceramic-Tube-Fuse-Metal-Axial-Lead-Slow-Blow-Type-Fuse-3-6x10mm-250V-10A/292272152527)

but they are slow blow and you probably want fast blow. Also 1A is better then nothing, but it is not 600mA.

These ones are fast blow, but glass not ceramic:
https://www.ebay.com.au/itm/10-x-250V-1A-Through-Hole-3-6-x-10mm-Fast-Acting-Axial-Fuse/301745786997? (https://www.ebay.com.au/itm/10-x-250V-1A-Through-Hole-3-6-x-10mm-Fast-Acting-Axial-Fuse/301745786997?)
https://www.ebay.com.au/itm/10-x-Glass-Cartridge-Quick-Blow-Axial-Lead-Fuse-3-6x10mm-250V-10A/391263039975? (https://www.ebay.com.au/itm/10-x-Glass-Cartridge-Quick-Blow-Axial-Lead-Fuse-3-6x10mm-250V-10A/391263039975?)
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: SpyTattoo on January 13, 2018, 11:13:10 am
Thank you everyone i will search genuine 600mA fuse first if they not sell i will buy new clone one.

First i must re-solder socket.....

Thanks all...
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: Armadillo on January 13, 2018, 11:55:07 am
Quote from: SpyTattoo on January 13, 2018, 11:13:10 am
Thank you everyone i will search genuine 600mA fuse first if they not sell i will buy new clone one.

First i must re-solder socket.....

Thanks all...

Hi, remember to plug in both the probes into the sockets when you solder so that the rings will stay concentric when you solder the joints. Hope you understand what I mean.
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: stj on January 13, 2018, 01:26:15 pm
https://www.ebay.com/itm/290754775264 (https://www.ebay.com/itm/290754775264)
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: Electro Detective on January 14, 2018, 09:14:25 am
Is the 600ma fuse confirmed blown?  :-//
Title: Re: Multimeter ANENG AN8002 failed on testing continuity please help.
Post by: SpyTattoo on January 14, 2018, 11:00:34 am
Quote from: Electro Detective on January 14, 2018, 09:14:25 am
Is the 600ma fuse confirmed blown?  :-//

It is not blown. I remove fuse and wire jumper directly not solve problem.

Is it another problem?

Do you have a schematics for this meter? Thanks