Re: Analog meter
"as Jestine Yong states on his smps ebook." can you please tell us what it said?
"as Jestine Yong states on his smps ebook." can you please tell us what it said?
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Analog meter
In that book you see him clearly specifying to do perform the measurements with an analog meter all the time. Also I've heard it before that they are more sensible and you can better understand something by the reaction of the indicator.
Anyways this is from his testing electronics components ebook.
"From my experience in the electronic troubleshooting field, I discovered that testing diodes using an analog multimeter is more accurate or precise than using a digital multimeter. I could explain to you in details why I prefer analog meters...I really came across quite a number of diodes that tested ok with a DMM but failed with an analog MM....."
For capacitance and voltage readings he does states that a digital meter is more suited.
"Many technicians and engineers dont know that they can actually test the optocouple with their analogue multimeter. Most of them think that there is no way of testing an IC with an analogue meter. Since we already know the optocouple pin out from the datasheet, testing this IC is just the same as measuring a normal bipolar transistor and LED"
"I do not encourage testing a transistor with a digital meter as I've encountered many times that a transistor tests good with a DMM but failed using the analogue meter".
Regards,Comment
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Re: Analog meter
Found a used Avo 8 mark 3 on ebay and took the plunge.
http://www.ebay.com/itm/Universal-Av...item1e75a901c5
Wishing myself best of luck!Comment
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Re: Analog meter
It go away for US $45.99
What is your budget? Those meters does not come dirt cheap.Comment
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Re: Analog meter
I like an analog for hunting intermittent issues.
I'm still using a Radio Shack 22-215 from the 90's.Comment
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Re: Analog meter
Well I do not wish to scare anyone
But this is my BBC Metrawatt MA4S (industrial version 80s)
Which jumps high even at 10KHz regarding volt measurement.
But they can be found only at the German eBay.Attached FilesComment
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Re: Analog meter
The feedback for the seller doesn't look all that great and there is no description at all on the AVO.
I suggest that when you get it, you test it thoroughly immediately. Some sellers only give you a 3 day return policy so you need to do some research now on how to test and use it properly.
I have purchased used multimeters from ebay sellers who list it as used or working perfectly only to find a number of problems.
I just spent days working/fixing a Fluke that was listed as used, but in working condition. I got it in DOA condition. Seller admitted he got it at estate sale and didn't even try to power it on.
The forum that I linked in post #18 may contain some good AVO information. While I don't have any analog multimeters, I have spent a little bit of time on that forum and I like it. The regulars/people there use periods, paragraphs, punctuation, spelling, proper grammar, no inline images and all seem very helpful.
If I ever get an analog Simpson or AVO, I would spend a lot of time over there. Hmm.....Last edited by retiredcaps; 01-06-2013, 03:14 AM.--- begin sig file ---
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Re: Analog meter
Thank you.
I saw your link and spent a few minutes on that forum before I started searching for the Avo.
Yeah I'm taking my chances here but at least I'll have ebay's buyer protection.
I looked at the guy's other auctions and he has lots of other old used stuff so it seems this is what he does and everything looks alright.
It's always taking chances when it comes to buying used things.
Also I can understand how having a better rating on ebay can be more difficult when you're selling used stuff.
As i said before, wishing myself good luck
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Re: Analog meter
Thank you Kiriakos GR.Comment
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Re: Analog meter
Hi guys,
I got the meter last week and I'm pleased finally after getting familiar with it and doing battery tweaks etc.
The one thing I'm wondering is about the ohms ranges. It has 0 ohm, ohm x100and ohms /100.
Think I understand the the 0 ohms range right but what are the other two ranges for?
Regards,Last edited by Beowulf; 01-19-2013, 12:50 AM.Comment
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Re: Analog meter
It is nice that you got your used car, and here is the steering wheel.
http://www.ko4bb.com/Manuals/09)_Mis.../Avo_8_Mk3.pdfComment
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Re: Analog meter
Thanks for taking the time Kiriakos. Yeah I already had a copy of the user's manual. I'll take another look to see if it gets to me after a second read.Comment
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Re: Analog meter
The X100 and /100 positions are used to multiply or divide the scale reading.
On the Ohms setting, the mid scale reads 2k Ohms. On the X100 setting, the mid scale reading would be 200k Ohms, and on the /100 setting, the mid scale reading would be 20 Ohms. This is how the meter is able to cover the range 0.5 Ohms to 20M Ohms.
I used to use AVO's every day at my workplace, mainly Mk IV's. Very hard to break, considering the number if times I would cause the cut-out to pop up!Last edited by Radio Fox; 01-25-2013, 05:18 AM.________________________________________________
Invisible airwaves crackle with lifeBright antennae bristle with the energy________________________________________________Comment
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Re: Analog meter
Thanks @radio fox.
Yeah I'm glad I bought one.Comment
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Most analog meters are actually current driven - a current is needed to deflect the pointer full scale. They can be lots of different values. There are ones that can take several amperes to swing the pointer as they have internal shunts.
On the other hand there are many that are rated in microamps for the intent that they draw as little power as possible from the devices under test. Some are 1mA, 500µA, 200µA, 100µA, and the ubiquitous 50µA frequently used in analog VOMs. There are even 20, 25, 30 µA and even down to 10µA. Been collecting a bunch of different ratings and... -
Hi
I want to change the scale of an analog meter, to monitor the charge of an li-ion single cell, so the needle at the end would point 4.2 volts and the 0 on the meter would point 2.5 volts or so, i tried to add diodes or a zener in series with the meter but the changes of the ambient temperature also changes the voltage value on the meter
I wonder how i can accomplish this so the meter would be precise at any temperature ?
Thnaks -
I read EBOOK of Testing Electronic Component and found that
"In order to test the small blue resin coated ceramic disk capacitor which has 104 50v specification,it is possible to test this small ceramic capacitor by making use of analogue meter.
Set to times 10Kohm that has 12v output from the probe to check disorder of ceramic capacitor.
It is not uncommon that testing result of digital capacitance meter is okay,But It show shorted reading when you check it with analogue meter."
Is it really possible to test small ceramic disc capacitor with analogue... -
I have had with regular AA batteries that leak this meter is expensive new I already replaced the battery battery clips once and the same thing happened again and I am tried of so it is getting modified to accommodate lithium ion batteries that are the same size excluding the positive terminal and removing the battery clips I will have enough room for the BMS protection board
I going to put 3 lithium ion battery in parallel with the BMS protection board and a way to charge the battery externally and heat shrink the battery pack and use a JST connector so I easily remove the battery... -
Just wondering - I'm sure some here have destroyed analog meters in the past. I'm curious as to how much overcurrent is needed to destroy these things.
I accidentally left my 20KΩ/V analog meter in the 10mA range trying to monitor a solar cell. The solar cell was in subdued lighting at the time (twilight/dusk) and was getting 1mA or so. However I had forgotten about it and later the full sun shone on it...
In full sun, or typically when it's sunny, the cell delivers 100mA (it should be more than this as far as I know, possibly age related decay, dunno, hence...
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