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Күн бұрын

Are analog multimeters still of any practical value compared to digital?
Only Dave can ponder that question for a half hour video...
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Пікірлер: 598
@RPRosen-ki2fk
@RPRosen-ki2fk 6 жыл бұрын
I remember blowing the needle right off my dad's Simpson 260 series 3. I was always destroying his tools. I don't know why he never killed me. I still have the meter, with the needle in pieces, bouncing around inside. I miss him.
@marvinmartian8746
@marvinmartian8746 6 жыл бұрын
The last part. So sweet. Seriously.
@NetworkXIII
@NetworkXIII 6 жыл бұрын
I broke a lot of my father's tools also. Just one of many of the reasons that I never had kids of my own. And yes, he loved his Simpson 260s, used one at his job (R&M electrician) almost until the day he retired.
@guyfamily5323
@guyfamily5323 6 жыл бұрын
becuase in some cases to left a victim alive is a greater punishment
@mrhaze000
@mrhaze000 5 жыл бұрын
i was like that w my granddad good times. But i usually fixed things. I miss him too man.
@aurelienyonrac
@aurelienyonrac 4 жыл бұрын
He is in our heart.
@craign8ca
@craign8ca 6 жыл бұрын
The analog db scale comes in handy when you want to calibrate audio equipment. That and RF alignments are the reason I keep the Simpson 260 around.
@JamesHalfHorse
@JamesHalfHorse Жыл бұрын
The exact reason I have one. It is much easier to peak something when you watch a needle peak and not numbers counting. A digital one that shows you some sort of graph will work but a simple analog multimeter is much easier. Same with RF power. Use whatever meter you want but at the end of the day an analog Bird 43 meter is the standard and what you will be judged with.
@proffski
@proffski 6 жыл бұрын
Very useful in 'peaking' some rf stages when you just want to see the peak rather than digits going up and down.
@flybackrs
@flybackrs 3 жыл бұрын
Don't basically all DMMs have a max function?
@trcostan
@trcostan 3 жыл бұрын
@@flybackrs but they don’t measure RF voltages worth a darn!
@hellopomelo2
@hellopomelo2 3 жыл бұрын
Thats what the bar graph’s for fam
@daviderickennedy2194
@daviderickennedy2194 Жыл бұрын
@@flybackrs Yes they do and some better bench DMM even better functions for doing RF stages, but I don't thing most people know.
@jasonwarnes
@jasonwarnes 6 жыл бұрын
One of the best reasons I've heard to use an analog multimeter is when measurements are being made in an extremely cold environment (like outdoors during Canadian winters ;) ). When it's very cold that's when LCD displays start slowing down making it difficult to take measurements and analog displays continue without any noticeable problems. At least that's been my experience.
@MrDoneboy
@MrDoneboy 3 жыл бұрын
I live in Houston Texas, so that's never been a problem for me!
@lupojacobo9892
@lupojacobo9892 2 жыл бұрын
I disagree with you
@omniyambot9876
@omniyambot9876 Жыл бұрын
I love analog stuff and collect them. But oh god people come up with all sorts of excuse to say analogs meters are still relevant.
@suzukiman650
@suzukiman650 6 жыл бұрын
I work in telecom and carry both a Fluke 177, which gets used the most, and a trusty old Simpson 260. The Fluke DMM is utterly useless when trying to look for cable faults, specifically grounds, on copper cable that has AC power influence on it. The Simpson will show the fault no problem but the Fluke will not due to the interference of the induced AC. Good analog meters still due have a place in this day and age.
@suzukiman650
@suzukiman650 6 жыл бұрын
I also have to use it to catch quick high voltage pulses when working on an HDSL circuit because the DMM doesn't seem to update quick enough to see them most of the time. Seeing the needle jump to 180VDC is much easier. Accuracy is not part of the equation, visualization is.
@franciscorafael7975
@franciscorafael7975 6 жыл бұрын
YEEEEEESSSSSSSSSSSSSS.
@1ohtaf1
@1ohtaf1 5 жыл бұрын
@@suzukiman650 The peak min max function on a DMM would capture that transient.
@rahimkvayath
@rahimkvayath 5 жыл бұрын
exactly
@alitatli3719
@alitatli3719 4 жыл бұрын
do you think to make an informative video?
@mikeselectricstuff
@mikeselectricstuff 6 жыл бұрын
I still remember being disappointed when I found out that the "output" function wasn't a voltage source
@EEVblog
@EEVblog 6 жыл бұрын
Me too. Some people think it's good for coupling to a scope, but scopes have AC coupling anyway so it's kinda moot.
@excavatoree
@excavatoree 6 жыл бұрын
I thought I was the only one.
@OC35
@OC35 6 жыл бұрын
It's called OUTPUT because you can connect it to the anode of an audio valve and measure the output audio signal.
@gianlucalocri
@gianlucalocri 6 жыл бұрын
I wonder what is that reset button for!? Schematic didn't show it...
@SodAlmighty
@SodAlmighty 3 жыл бұрын
@@gianlucalocri You clearly didn't pay attention
@holgers5216
@holgers5216 6 жыл бұрын
analog meters are irreplaceable for audio measurement and adjustment, as the needle 'moves less' than a typical digital meter. I use an analog AC millivolt meter when I calibrate tape decks, near impossible to do with a digital meter. Having said that though, for most other measurements, digital is the way to go. But, analog meters do have their preferred uses in certain applications.
@email16v
@email16v 4 жыл бұрын
Analog for telco field use. The needle movement is a really good indicator of resistance capacitance impedance etc. Most of the time you don't need to look for an actual measure. The needle activity tells you a story about the copper you're dealing with. It is a craft thing. My Simpson will always be my first choice
@teardowndan5364
@teardowndan5364 6 жыл бұрын
Main advantage of analog IMO: no batteries required for volts and amps. Handy if you just want to wire the meter(s) in and forget about it.
@SkazaTV
@SkazaTV 6 жыл бұрын
or if your batteries are always flat lol
@felaflame
@felaflame 6 жыл бұрын
We were forced in the school to use analog multimeters, although the digital at that era existed... the reason (according to teacher) - to understand, how it works. I hated it.
@migsvensurfing6310
@migsvensurfing6310 6 жыл бұрын
But, he is right.
@hanayokoizomi9369
@hanayokoizomi9369 2 ай бұрын
The instructor is right.. still using analog for troubleshooting electronics
@insylem
@insylem 6 жыл бұрын
I find analog meters useful for checking pots for dead spots. I'll have to try a digital on one again and see if the bargraph can show a deadspot. Thanks for the video Dave.
@shinningraj
@shinningraj 2 жыл бұрын
Dave, I just love your videos the most. The rhyme or reason being your ability to HIGHLIGHT and speak boldly on the loopholes even on the greatest brands like Fluke or Simpson in that matter. Thanks for highlighting all the points of pros & cons. I was about to loss handsome amount on a particular analog meter. I will drop the idea of purchasing now. Loved it!
@lupojacobo9892
@lupojacobo9892 2 жыл бұрын
Same here
@supersilve
@supersilve 4 жыл бұрын
I have 6 meters in my workshop but I still use the analog one when testing transistors in audio work. The reason it makes life easier for me just taking a glance at the pointer and see the angle instead of reading the digits in a digital multi meter. Testing resistance with a DMM sometimes will give erratic readings to a pre energized circuit. Even the slightest voltage will disturb the readings and I have to disconnect the particular resistor to get the true reading. Electrolytic capacitors will hold a small voltage even when switched off for a long time.
@williamfrom6021
@williamfrom6021 6 жыл бұрын
Hey Dave? I just completed performing Electrical measurements at tafe as part of my diesel fitting apprenticeship. This video, if it was shortened would be super useful for the teachers to explain the differences between the tools. If you make a shorter version i would link it to my teachers.
@freewoodencrosses
@freewoodencrosses 2 жыл бұрын
My dad had a Simpson 260 and I would use it all the time. I got excited when digital meters came out, but my dad liked the Simpsons because if you have an intermittent circuit, the needle on the Simpson will respond and give you an instant result.
@allansmith6140
@allansmith6140 6 жыл бұрын
Its a very useful tool to have. I find there is nothing faster when doing troubleshooting. I set the meter where I can have it in my peripheral vision when I'm poking around taking rough measurements. Obviously a DMM will be more accurate and have better resolution, I have lots of Flukes. It's not a matter of which is a better meter, its using the right tool for the job.
@234dilligaf
@234dilligaf 2 жыл бұрын
Exactly
@mattelder1971
@mattelder1971 4 жыл бұрын
I miss the Simpson 260. That was our standard issue model when I was an electronics technician in the Navy back in the 90s.
@jfgobin
@jfgobin 6 жыл бұрын
I think one of the huge benefit of starting with an analogue multimeter - I got my first in 1982 - was it gave you a good grip on measurement error early on: as Dave pointed out, these things are less accurate than their digital counterparts, the resolution was quite low and you'd better be sure you were dead in front of the thing to read it correctly.
@cameraguy4767
@cameraguy4767 6 жыл бұрын
No one uses analog meters anymore? Be sure to tell Simpson and Triplett and Sanwa and Gossen and all the rest of the manufacturers that still make them.
@ronvaliant9337
@ronvaliant9337 5 жыл бұрын
I disagree. Analog are much better at seeing trends. Plus they don’t need batteries for amps and voltage.
@jonny393
@jonny393 4 жыл бұрын
@@ronvaliant9337 i bet my pc notifying me when some value changes is superior over checking a multimeter every 5 secs...
@ronvaliant9337
@ronvaliant9337 4 жыл бұрын
@@jonny393 LOL Yeah and it's real convenient to carry a pc with you everywhere you want to make a measurement like on a boat or an rv.
@jonny393
@jonny393 4 жыл бұрын
@@ronvaliant9337 then i would maybe just take an oscilloscope with me instead of an oscilloscope sized Analog Multimeter
@ronvaliant9337
@ronvaliant9337 4 жыл бұрын
@@jonny393 Then you also have to plug it in so don't forget a generator. lol
@chrisfeaster7989
@chrisfeaster7989 6 жыл бұрын
they are still used on the american railroad for checking for grounds in the non grounded dc system. I used them when I worked for Norfolk southern railway and we had a digital meter but all track and grounds checks were done with simpson 113. here is the meter we used www.simpsonelectric.com/products/test-equipment/special-test-equipment/ts113-multimeter-for-railroad
@daviderickennedy2194
@daviderickennedy2194 Жыл бұрын
It's not because it's better, it's just not cost effective, practical to change the procedures and equipment out and have to retrain and document. You can still buy some really old meters new and their whole market is because procedures and procurement are too hard to change. The above could be a life or death situation, changing everything is risky unless they get something out of it.
@Petertronic
@Petertronic 6 жыл бұрын
Analogue meters still have their place, all the workshops I worked in had one somewhere. I still have my first meter, a Maplin analogue multimeter from 1988 - with transistor tester!! (Sadly Maplin Electronics in the UK has just shut down)
@chaos.corner
@chaos.corner 5 жыл бұрын
Maplin was a shadow of its former self. I still have a section of the catalog I tore out which showed the pinouts for all the ICs they sold. Why do all technical stores end up going that way?
@jh77sly
@jh77sly 6 жыл бұрын
Testing pots/varistors/switches for dead (open/short) spots can't really be done with a digital. My most common use is testing throttle position sensors on vehicles. Analog meters make that test stupid easy. Digital meters miss at least 15% due to refresh rate. All I need to see is the needle jump reliably at the same place 3 tests in a row and you're never going to find that with a digital. That's pretty much the only thing I use my old analogs for. Or if the batteries are dead in the digitals and I need a voltage measurement now.
@lupojacobo9892
@lupojacobo9892 2 жыл бұрын
Is just a meter of interpretation
@jaycee1980
@jaycee1980 6 жыл бұрын
I have the same Micronta multimeter that Dave had as his first meter. My first meter too ! They were sold well into the 1980s by Tandy. Still works, although it's had new probes a few times!
@tuttocrafting
@tuttocrafting 6 жыл бұрын
I used until yesterday a old chap analog multimeter of my dad. Now I moved to a an8008. All looks simpler with a digital meter. (I switched mainly for the diode mode and the ohm meter easier to read)
@SomeMorganSomewhere
@SomeMorganSomewhere 6 жыл бұрын
Friend of mine found one use for an analog meter, he had an issue where his car battery kept running flat (some years ago now). He tested with a DMM to see how much current was being drawn when the car was off, saw a lot of bugger all. Connected an analog meter, saw it kicking about once a second, of all things it was the clock.
@petermikus2363
@petermikus2363 2 жыл бұрын
@Bilde Rothchild he didnt have a pulse meter but had an analog meter on hand
@lupojacobo9892
@lupojacobo9892 2 жыл бұрын
I can find that problem with a DMM as well. I always do it.
@TheRealSasquatch
@TheRealSasquatch 6 жыл бұрын
I still use a couple of old AVO MK 8's for old valve radios.
@pileggitech
@pileggitech 6 жыл бұрын
I still have my dad's Simpson 260 Series 7P analog meter, in the 7PRT roll top case! Fantastic!
@joejdl
@joejdl 6 жыл бұрын
OMG! That Tandy-bought Micronta was my first multimeter model when i was a kid too. Cool to see it again. Mine only lasted couple of years, and died after I discovered that you shouldn’t accidentally leave it on ohms when you test a live 240v socket. Whoops!
@JohnSmith-xn3fr
@JohnSmith-xn3fr 6 жыл бұрын
Sure I use DMMs now, but I miss analogs for one reason : when checking an expected voltage, I could register the needle position within a corner of my eye, not having to directly look at the meter, thus knowing whether I've found, say, 12V or not. With DMMs, even with bar graph - you have to look into the display. I find DMMs to be measurement instruments, while analogs are representation instruments.
@PanoWorks
@PanoWorks 6 жыл бұрын
Exactly the same reason why many cockpit instruments, pressure indicators, etc. use an analog style display. I say analog style, because the displays are purely digital. A lot of the "analog multimeters are better because..." reasons - other than the ones about very niche applications (GHz AC?) for which I'm sure there are niche DMMs available - are similarly not actually about how the multimeter fundamentally functions, but about how the information gets displayed. Swap out the fixed-segment LCDs for a matrix one (given prices, just go full graphical TFT LCD) and now you can display accurate values as well as graphical presentations however you design it - from a classic analog meter look through to a basic and dirty 'oscilloscope' view.
@0x8badf00d
@0x8badf00d 6 жыл бұрын
If you try to measure 10V and the meter rapidly jumps between 9.xx and 10.00 V, makes it look like you have almost 20 V if you don't think hard enough. What could be better than if your altitude appears to be twice as high as it really is? (:
@davidprice2861
@davidprice2861 6 жыл бұрын
True you need to interpret digits, but reading analog you just look. My Fluke has a bar graph at bottom of the display and is very handy sometimes. Look at aircraft instruments important (spatial) ones are always analog. Who wants a digital clock? not me.
@carldawson5069
@carldawson5069 5 жыл бұрын
I remember an upright video game, 3 other techs in shop thought roms were bad. 2nd player score was between 1st player and centered high score. Digital meters showed a bang on 12v supply. My analog swung from 12 down to 8v. Confused, i used a scope and saw the short dip to 8v. One leg of brute force power supply filter cap had broken. Currently i see a fluke meter blackout a 4 micro amp signal, and a couple of other digital meters require a little swag to filter out the effects of non 60 hertz signals. But ohms, i still prefer digital.
@daviderickennedy2194
@daviderickennedy2194 Жыл бұрын
I get this, so true! The better DMM for automotive use have those functions built into them though, so you can hear or see lights for + or - 12 volts and much more.
@Fir3Chi3f
@Fir3Chi3f 6 жыл бұрын
Dave put up a half hour video comparing digital vs analog meters? Oh yeah! Good on ya Dave!
@Starphot
@Starphot 6 жыл бұрын
I used the Simpson 260 in the Navy in the early 1970's and the case style and the meter markings font were different. We were trained about to compensate for the meter impedance, if need be. I have the RS 22-201 version since the 1970's and I still use it! I also used a VTVM, the forerunner of the FET meter.
@bobweiss8682
@bobweiss8682 6 жыл бұрын
I still use an analog meter (and a VTVM at that) when doing RF alignments. Much easier to tune for a peak or dip using an analog meter, even compared to the bargraph on my Fluke DMMs. The "output" jack on a VOM was intended to be fed out to an oscilloscope, typically used for looking at ripple on power supply rails.
@joesmith-je3tq
@joesmith-je3tq 6 жыл бұрын
I assumed they were all DC coupled and without the cap, there is no way to strip the DC from a biased signal.
@scrook1027
@scrook1027 6 жыл бұрын
I agree, even with a Fluke and the graphing indicator it still isn't as easy to do RF alignments, as it is with a VTVM. RF alignments is the only use now days I have for my VTVM.
@skeggjoldgunnr3167
@skeggjoldgunnr3167 6 жыл бұрын
And it probably has a true jeweled d'arsonval movement. I once had some heathkit and rca vtvm's...a "voltohmyst" i think i remember as well.
@ronjones4069
@ronjones4069 6 жыл бұрын
It is hard to beat a cluster of analog meters to quickly give you a quick idea that the process you are monitoring is working or something is going amuck. They will always have their place. They aren't better nor worse, they are simply different.
@Kris_M
@Kris_M 5 жыл бұрын
Exactly, perfect for e.g. showing that a bunch of temperatures in your process are close to perfect (needle vertical), a bit below/above, a lot below/above, ... All by having even only a swift glance at the panel. Even led vu-meters aren't as good for that. Of course, these aren't multimeters anymore.
@abelincoln7473
@abelincoln7473 6 жыл бұрын
Ultimately i think you need to have both types of meters, a DMM thats at 5 1/2 digits or 6 1/2 digits resolution for the quantitative work and an analog meter for troubleshooting circuits and field service. Same with Digital vs Analog o-scopes, there are certain things that each type will do better. Nothing better than an old Tek 2467 for a fast capture or looking at RF. But just the same I love having a digital o-scope with its serial decode and signal analysis functionality
@MegaQwerty2000
@MegaQwerty2000 6 жыл бұрын
What about reading possible defective potentiometers and rheostat's. In the Navy we had to keep old Simpson 260s analog meters on hand just for those test. They would help detect burn spots/worn carbon traces as the contacts would slide over the range of the potentiometer/Rheostats. On a digital meter it just looks like the meter is normally searching for a value.
@LukasDzunko
@LukasDzunko 6 жыл бұрын
That exactly the point ... most of the time precision does not matter but have ability to "see" what is going on is priceless ... Also people more easily remember angle of needle of "safe value" than read value and think if it is OK or not ...
@randomartly
@randomartly 5 жыл бұрын
Regarding the analogue meter consuming power from the leads to drive the needle, would it be possible to use an op-amp set up as a buffer, so it drives the output to match the input (which has a high impedance), then connect the probe to the input? Is this not feasible or are these analogue meters older than op amp technology?
@phloodpants
@phloodpants 4 жыл бұрын
Before digital multimeters existed, how did they make high-precision measurements? Is there something like a 7-digit meter in analog form?
@dennischertkovsky8871
@dennischertkovsky8871 4 жыл бұрын
Chris Hoppe Yes. It is called a differential voltmeter. There are a couple videos on KZfaq demonstrating its use if you search that term. A very sensitive voltmeter (called a null detector) was used to compare the input voltage to a divided-down voltage reference, usually with a 4-6 digit Kelvin-Varley divider. Once you set the divider so that the meter reads zero, you directly read the voltage off of the dials. Tedious, but could offer theoretically infinite input impedance in some ranges because there is no voltage across the meter once it is nulled out. They have only relatively recently been replaced by 8.5 digit multimeters in NIST-type metrology applications. You can still make a measurement this way with a modern voltage reference, KVD, and null detector, but the combined cost might exceed that of a new car.
@Jilocasindragon
@Jilocasindragon 6 жыл бұрын
Hey Dave, I never quite got the whole impedance topic and wanted to ask whether that would be an appropriate thing for a fundamentals friday. You did cover impedance here and there, but I didn't manage to find a designated EEVBLOG video about it. :)
@pausmth
@pausmth 6 жыл бұрын
They can also be useful for the education market, i.e. being able to demonstrate the decay factor in a capacitor in front of a classroom etc. So niche not really a big plus, but I still remember that from some university lectures.
@mdijkens
@mdijkens 6 жыл бұрын
For my hobby I have a 100k, 60k and 10k DMM, but in my boat I still have this 60 year old AMM from my dad which is perfect there: - Never empty battery (biggest advantage for a meter hardly used) - Excellent to see if there's a voltage or if the battery is full or empty - Very short touch to see if there are big amps without blowing a fuse
@SamuelCarrier92
@SamuelCarrier92 6 жыл бұрын
We use it for polarity test on CT's with a center 0 analog multimeter. auto- ranging multimeter are hopeless for that of course and we don't care for the exact value. applying a battery voltage to a CT produces a positive and then negative voltage so it's hard to see on a digital multimeter because there is not enough lag. Is there a good digital multimeter for that with a centered 0 bargraph?
@EEVblog
@EEVblog 6 жыл бұрын
I've seen them, but can't recall offhand.
@OlympusHeavyCavalry
@OlympusHeavyCavalry 5 жыл бұрын
Would it be safe to say that the 2% error margin for the analog meter is the 50 micro amps powering the needle?
@drewtaylor4933
@drewtaylor4933 6 жыл бұрын
Enjoyed the discussion. Thanks Dave.
@michaelhawthorne8696
@michaelhawthorne8696 Жыл бұрын
This takes me back to my days at college (Early 80's) when we used AVO8's, nice one Dave. You showed the very same meter I bought from Tandy back in the day at 1:10. It's important to make sure the analog meter is in the off position during transit as the switch shorts out the meter to stop it from moving too much...this can be seen 24:44.
@randyriegel8553
@randyriegel8553 4 жыл бұрын
Last time I used a analog meter was to get diagnostic output codes from ODBII diagnostic port on a car. Keep track of the LONG and SHORT needle movement. Worked back in the 90's when I needed it. :)
@JohnAudioTech
@JohnAudioTech 6 жыл бұрын
I used to use analog meters to find resonant peaks and dips of loudspeaker response by monitoring current drawn from the supply of a small amplifier. Much easier to see than the changing digits. The bar graph was useless for this too (not enough resolution).
@bugmenotspammers7780
@bugmenotspammers7780 6 жыл бұрын
They now have pretty decent handheld oscilloscopes.
@Edu_RJR
@Edu_RJR 6 жыл бұрын
both are the best in their own way, you can't beat the instant beeping and hight input impedance of a digital multimeter, but you can't deny how robust the analog is if you mess things up
@joesmith-je3tq
@joesmith-je3tq 6 жыл бұрын
Nice to see the 121GW getting used in your videos. Enjoyed the video. I figured you would really drive the point home by showing some of the higher end features a meter like the 121GW can do that the analog meters can not.
@timlipinski2571
@timlipinski2571 6 жыл бұрын
When I worked for my Uncle I did handle the Simpson 260 meter ! Thank you for the video ! tjl P.S. Also liked the Frequency Selective Volt Meter... Had a loose wire for the input and a Speaker on the output... !
@hippynurd
@hippynurd 6 жыл бұрын
Where did you find my old meter? I havnt seen it in years! didnt it mention something about diamonds (presumably for he needle to pivot on).
@hippynurd
@hippynurd 6 жыл бұрын
You keep saying analog multimeter, but arent these really VOM (Volt/Ohm Meter?) I thought we only started calling them mulitmeters when they went digital, because they do many functions besides just volt/ohm.
@Geoffh777
@Geoffh777 4 жыл бұрын
I still have my Taylor 88B, a cousin of the Avo 8 when both were owned by Thorn. It still has it's uses and I still love it.
@milanfixer
@milanfixer 4 жыл бұрын
It's really good to know how it was done back in the day. Makes you appreciate the lack of hassle you don't have to go through now.
@fffnorbi
@fffnorbi 6 жыл бұрын
Hello. I like your blog. One question, how can I buy one of your multimeters ? thank you.
@WR3ND
@WR3ND 5 жыл бұрын
One thing I noticed with the analog meters is that they help illustrate conceptualized and applied electrical theory, so they might still be rather useful for educational purposes.
@NetworkXIII
@NetworkXIII 6 жыл бұрын
We still love our old 8-bit computers and videogames, old cars, LP records, tube radios .. yes, the modern digital multimeter is better in just about every way, but sometimes you just want to enjoy something old that still works.
@dogwalker666
@dogwalker666 6 жыл бұрын
if your setting up any analogue control signals digital's are far too slow you can also see the average instantly and how wide the error band is - however for all others i use digital with range lock as auto range is a pain if the signal is fluctuating near the scale point
@gladiusilluminatus3720
@gladiusilluminatus3720 6 жыл бұрын
What about TRMS ? A Digital Multimeter needs to have special functionality to measure Signals where this matters but is there such a thing as an analog TRMS meter ? or do they always measure the TRMS value because the needle is driven by the strength of the magnetic field wich already resembles an TRMS value ?
@EEVblog
@EEVblog 6 жыл бұрын
Analog meters are only "RMS" when it's a sine wave you are measuring. Other waveforms will not be True RMS.
@EEVblog
@EEVblog 6 жыл бұрын
There is a big difference between "True RMS" and "Averaging responding with an RMS multiplier fudge factor". Analog meters are the latter.
@herbsong3091
@herbsong3091 6 жыл бұрын
EEVblog Yes. To put it in plain language, analog meter can only measure AVERAGE value. Then suppose it is sine wave, convert to Root Mean Square value. If the ac is not sine wave, the reading is all over the places, has practically no meaning.
@herbsong3091
@herbsong3091 6 жыл бұрын
Gladius Illuminatus Analog meter measures average value. Not TRMS value. For DC, average value is right. For ac, only sine wave get the right reading.
@WolfgangMahringer
@WolfgangMahringer 6 жыл бұрын
In fact, there is a special type of analog intrument that is able to measure true RMS voltages and currents: moving iron instruments.
@mfbfreak
@mfbfreak 6 жыл бұрын
It's a matter of preference. I love my analog meters, which are excellent in 'Yep, the anode voltage is right around 170v' in circuits where it doesn't matter if it's 5% lower or higher. Or in high frequency environments that interfere with the digital electronics. I use a digital meter too, in high impedance circuits.
@dartrunner4599
@dartrunner4599 6 жыл бұрын
What are the wires coming out of the 121GW Amp plug hole?
@supersilve
@supersilve Жыл бұрын
I use an analog meter mostly for checking transistors for any leakage between the pins in the reverse mode using x1k and sometimes x10k scale. Something you cannot measure with a digital meter on the ohms range and diode test as the voltage is too low.
@mozgmozg4393
@mozgmozg4393 6 жыл бұрын
A few days ago i tried to measure supply current of Z-scale train model, and cheap DMM (I realise that advanced models can do that better, but I have only 830-clone, without bargraph) gave something reliable only for stalled motor. While running, an old analog meter gave me not precise, but more adequate information about current. So, one of analog meter advantages - working with noisy signals (If you need an easy averaging, NOT the noise and short spikes detection). But you still have to check everything with scope while troubleshooting power supply issues. And there were combined models, with digital display and analog needle, for those who have not decided yet. :) (Sorry for mistakes, english is not my native language)
@scotshabalam2432
@scotshabalam2432 5 жыл бұрын
I have the Micronta on the left, almost. It's Not labeled "FET Analog" and where the DC10A jack is is an "Output" jack is. I keep it around because it has the fastest most sensitive continuity latching of any of my multimeters. It will detect continuity through 3lbs blocks of steel with oxidized surfaces and it's instant.
@carlfranz6805
@carlfranz6805 6 жыл бұрын
"Traditional modern one"... I howled with laughter.
@cat-lw6kq
@cat-lw6kq 6 жыл бұрын
As a telephone tech working outside in the field I used an analog meter every day, I found it very useful.
@urugulu1656
@urugulu1656 6 жыл бұрын
you can get a bit of accuracy relative to the circular angle in ohms mode by using the blue scale if i see that correctly. also this removes the need to remember that the 0 is on the other end of the scale
@banjax66
@banjax66 6 жыл бұрын
The thing that bugs me most about digital meters is the damn things turn them selves off after a few idle minutes. Ok, it may save battery life but it annoys the crap out of me!
@dickcheney6
@dickcheney6 4 жыл бұрын
Yeah, an analog meter doesnt even need any batteries to measure voltage/current.
@jakublulek3261
@jakublulek3261 3 жыл бұрын
@@dickcheney6 Reason, why I still have one around.
@randycarter2001
@randycarter2001 6 жыл бұрын
Analog meters do a great job of averaging the reading. On some digitals the display is just random numbers making it difficult to see the average.
@call5sam
@call5sam 3 жыл бұрын
What about peaking IF stages on old tube radio?
@shivamvaid601
@shivamvaid601 6 жыл бұрын
Well yes analog meters aren't that common now but we just can't forget the workhorse of the thing that basically propelled us into the digital age.
@lawrencemiller3829
@lawrencemiller3829 6 жыл бұрын
I tend to agree that the old technology and ways should not be completely discarded and forgotten just because they have been displaced. At a minimum it would be useful if they were still documented, new better might come from these older things. On a side note, I did petition the FCC to keep the Morse code requirement in the highest amateur radio license, but the Morse code requirement has been removed. I guess it is OK, there is still Morse on the air, but, as Dave might say, I wonder if it is only gray hairs using it.
@EEVblog
@EEVblog 6 жыл бұрын
I never said forget them. I said there are still niche uses for them, and that's why you can still buy them.
@shivamvaid601
@shivamvaid601 6 жыл бұрын
EEVblog oh I didn't mean you said to forget them. Generally people don't really know now.
@kenhaveachat7630
@kenhaveachat7630 Жыл бұрын
I have that very same Micronta "Dual Fet" which I use in the field, had it for 20 years, but I also have Triplett 630 NA Type 4 suspension, (pride of place on the desk) it has a doubler, so can get good resolution.. it rarely gets used outdoors tho - so I don't damage it! Just about to order a new 30V battery for it. I've also got a Fluke 77 11 (also has bar graph) to get down to small numbers. All that aside, I really like the Triplett.
@gamingSlasher
@gamingSlasher 6 жыл бұрын
The only thing that was better for me was when I repaired TVs and other electronics. The low input impedance often helped me find errors because a fault in the circuit usually made it react in a non-normal way when I measured at that point. It was also easier to just fast glance over and see that "something" is measured. A digital could sometimes be hopeless with the numbers jumping around. Sometimes you dont know if you got contact or not because of the high impedance. The fact that it works without batteries is also a plus as mentioned. Especially if you want to have a multimeter in a place you seldom need it.
@scottstoner1576
@scottstoner1576 6 жыл бұрын
I am a HVAC contractor and for measuring starting amperage for a compressor an analog amprobe is superior, digital does not react quick enough. Although some of the newer digital amprobe (clamp meters) do record inrush amperage.
@yendak
@yendak 6 жыл бұрын
Maybe it gets mentioned later on, haven't watched the entire video yet, but what is "L.P. Ohm" / the blue scale?
@karpenterken1
@karpenterken1 6 жыл бұрын
Low power ohms. It provides resistance measurement on diodes, ic's and transistors without damaging them or creating a loading effect that would alter the resistance reading by providing a lower voltage and current level output from the meter's circuitry. Resistance measurements rely on the meter's internal battery to supply voltage and current through a component to calculate its resistance. That battery voltage and current can damage some components or affect the reading during testing and that's the purpose of having a low power ohms range(s).
@yendak
@yendak 6 жыл бұрын
Thank you for the explanation.
@highfidelityinc
@highfidelityinc 6 жыл бұрын
You cannot beat an analog multimeter for checking small DC motors. Using the ohm Rx1 scale, you can immediately see if the motor has dead spots (shorts and opens) at various angles by how much the meter jumps around. Shoot, you don't even need to turn the motor shaft by hand to check it too as most analog VOMs will spin the motor. Even will tell you if the bearings are binding. To a less extent, peaking or adjusting for a null is a little better on an analog meter. But yes, for every thing else, you cannot beat modern DVM.
@deepblueskyshine
@deepblueskyshine 6 жыл бұрын
Each and evry magnetic measuring head is most accurate at 2/3 traveling distanse of the needle. So even with the most accurate measuring head, your instrument is as good as there are many overlaping ranges, so that you can put measured value around these 2/3-rds. Still, for max-ing and tunning something you have to turn with screwdriver or turn-knob it is the best.
@LektroiD
@LektroiD 6 жыл бұрын
My first meter was a Micronta 22-212, I think it was an 11th or 12th birthday gift, I loved that thing, no idea what happened to it though, I've been digital for years...
@gatesmw50
@gatesmw50 3 жыл бұрын
At 12:44 your point about DC input resistance, re circuit loading is well taken & understood. No debate. HOWEVER I have a Triplett 603 analog multimeter that specs out at 11 Meg Ohms DC input resistance and 10 Meg Ohms AC. Yes I also own several DMM too.
@Finom1
@Finom1 6 жыл бұрын
Where can I buy a 121GW EEV Blog Multimeter?
@migsvensurfing6310
@migsvensurfing6310 6 жыл бұрын
In China😁
@tamtgirl
@tamtgirl 6 жыл бұрын
don't VTVM's have very high input impedance?
@bikejoede
@bikejoede 6 жыл бұрын
This reminds me of having to learn how to use one of these old fashioned slide rules in Mathematics at school back in the day when I was a boy! And me and my classmates all had an electronic calculator in our rucksacks. Jeeeess! Rolleyes!
@hannahranga
@hannahranga 6 жыл бұрын
We still get issued a avo 8, they spend a fortune keeping them in cal for the one or two people that still want to use them. I mean the input impedance is handy but a resistor for your digital meter is just as handy.
@srsykes
@srsykes 2 жыл бұрын
Remember too that the 2% or 1.5% was of the full scale for that range. So care had to be taken to assure that readings were in the upper part of the range to achieve better accuracy. I had forgotten what a pain in the behind analog multimeters were. I was a bigger fan of the VTVM because of input impedance problem
@nullvoidpointer
@nullvoidpointer Ай бұрын
I keep a few around to get an easy visual indication of voltage/current. Its a lot nicer the digital when peaking/adjusting anything, and just gives a really nice at-a-glance readout.
@Cassia-Aurea
@Cassia-Aurea 6 жыл бұрын
I have one handy in car toolbox -- works without battery. I also hve one analog on bench, totally out of callibration, used as peak indicator for any tuning. What I like in analog meters is ease to see the speed and direction of change of measured value, bar indicator is just not good enough.
@andljoy
@andljoy 6 жыл бұрын
IF you want to quickly see , yes there is some voltage there very quickly , analoug is better ( look at the clare PAT gear , analoug meter is super quick and nice and easy to see)
@eddiespencer1
@eddiespencer1 6 жыл бұрын
Being competent in using an AMM is a valuable skill that any field-tech or engineer should have. They might not be as convenient as a DMM but sometimes AMMs are all you've got to work with.
@tubical71
@tubical71 6 жыл бұрын
analog meters keep your brain alive...you need to know what you´re doing....:)
@georgebliss964
@georgebliss964 6 жыл бұрын
I do like the decibel scale on my analogue meter which I use to check frequency response. I would certainly get the needle if I didn't have a needle!
@Kris_M
@Kris_M 5 жыл бұрын
20:14 The bar graph doesn't show anything because of working below its resolution. 20:47 a bit disappointing...
@viperidaenz1
@viperidaenz1 6 жыл бұрын
Do the FET input analog meters require batteries to measure volts?
@migsvensurfing6310
@migsvensurfing6310 6 жыл бұрын
Chris Fairhall Yes, all measurements are routed thru the fet's.
@abh-itsanamazingworld6283
@abh-itsanamazingworld6283 6 жыл бұрын
The RCA Senior VoltOhmyst (WV-98C) has an 11 Megohm DC input resistance. I think the Fluke 87 is 10 Megohm. Kind of impressive for an old school analog meter.
@oeioei
@oeioei 6 жыл бұрын
With my comment on AC measurements I was referring to the low accuracy at lower ranges because of the voltage drop over the rectifier diodes. Even if the digital meter doesn't have true RMS, it is still superior.
@TradieTrev
@TradieTrev 6 жыл бұрын
But Dave I still use my analog insulation resistance meter everyday, much easier to find electrical faults over a slow digital type. Especially if the fault is random, you can see the needle fluctuate as the digital types tend to dick around.
@powderdescent
@powderdescent 6 жыл бұрын
Let’s just call analog meters a “Trap for old players...”
@JerryWalker001
@JerryWalker001 6 жыл бұрын
You have much to learn grasshopper.
@redemptusrenatus5336
@redemptusrenatus5336 6 жыл бұрын
How do you think they got to make your 6 1/2 digit Keysight... using the crap analog meters.
@bugmenotspammers7780
@bugmenotspammers7780 6 жыл бұрын
TBF, damn near any meter is crap compared to that (expensive, but got what you paid for) meter.
@stryk187
@stryk187 6 жыл бұрын
My dad still swears by old school analog meters. He says it's a user interface issue, and claims a digital readout will never be able to replace a needle/gauge type display. I have to admit, in some applications he makes a good point. Seeing the needle bounce in relation to fluctuations is a much better indicator than some digital segmented numbers flippin all around.
@Hagledesperado
@Hagledesperado 6 жыл бұрын
Not trying to pester you about it, but it's been a while since your last update on the 121GW. How is it coming along?
@EEVblog
@EEVblog 6 жыл бұрын
Follow the eevblog forum thread.
@Hagledesperado
@Hagledesperado 6 жыл бұрын
This one? www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg1395267/
@KozmykJ
@KozmykJ 6 жыл бұрын
Last time I remember Analogue having the edge over Digital was for multi-track tape recorder alignment. The BIG AVO meter scale was just the thing for tweaking those head positions and peaking/nulling the bias oscillator coil cores. Hi-res, fast refresh bar graphs of this era, but not the 90s DMMs, could get somewhere near that performance I guess but none as big as the old AVO movement. For all that though, even the revival of the tape machine is an old thing now and they are pretty niche, but they're still out there. My old AVO 8 needs a good service. My Mk7 probably needs a nice museum to reside in.... Got 5 DMMs at the moment. 6 when the EEV BM235 arrives 😉
@abhineshsethumadhava
@abhineshsethumadhava 6 жыл бұрын
Please also do a review on thermal scopes or thermal instrumentation devices
@andyhello23
@andyhello23 6 жыл бұрын
Fascinating, how these have advanced. Reminds me of weighing scales. The old analog, and the new digital.
@skeggjoldgunnr3167
@skeggjoldgunnr3167 Жыл бұрын
Is taut band better than jewelled D'Arsonval movement?
@Spector_NS5_RD
@Spector_NS5_RD 6 жыл бұрын
time for the question you probably answered a thousand and one times before.........where can i buy the 121GW?
@EEVblog
@EEVblog 6 жыл бұрын
You can't.
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