Up-grade multimeter which ones? - Electronic Circuits Projects Diagrams Free

Don Wilson · 11th April 2008, 01:47 AM

I have noticed Sears has on with frequency, would this be good enough for starter projects. It is around $60.00, or what should I get, I have a smaller version of the same meter,without frequency probe. What would you suggest.

jpanhalt · 11th April 2008, 01:59 AM

I would look for a cheap scope. A used Velleman HPS5 would certainly be less; a new HPS10 is only $100. John

dknguyen · 11th April 2008, 02:09 AM

Get a scope. A PO scope is $200 and is also a bunch of other stuff too like a logic analyzer, signal generator, and spectrum analyzer. It would be much more useful than a simple DMM.

http://po.labs.googlepages.com/

Don Wilson · 11th April 2008, 11:00 PM

Who makes them, where can I buy one?

Very nice photo.

dknguyen · 11th April 2008, 11:10 PM

I have no idea where you are, but www.hvwtech.com is one place that sells them.

Don Wilson · 11th April 2008, 11:27 PM

I took a look at the site, this is tools and software to attach to pc. Is this a good tool. I am never going to spend 3500 for a scope.

Dean Huster · 11th April 2008, 11:43 PM

Don, the February 2008 issue of "EE Evaluation Engineering" (one of those "free to qualified subscriber" magazines) beginning on page 28, has the article "Powerfel and Portable DMMs for 2008". Their web site is http://www.evaluationengineering.com and although this article is not currently posted there, I suspect that it will be. They evaluate 19 different models from 9 manufacturers priced from $55 to $895. The low end generally gives you an accuracy of around ±0.5% while the high-end models are around ±0.025%. I'm not sure that this is an all-encompassing article, for they show only one Fluke model. That's a little questionable.

Dean

dknguyen · 11th April 2008, 11:59 PM

Quote:

Originally Posted by Don Wilson

I took a look at the site, this is tools and software to attach to pc. Is this a good tool. I am never going to spend 3500 for a scope.

THen spend $800! $3500 is a pretty fancy scope. My problem is I need to observe motor switching waveforms which are square waves, but not "logical" so a logic analyzer won't work and I need a 40MHz+ bandwidth scope.

**Nigel Goodwin** · 12th April 2008, 11:46 AM

Quote:

Originally Posted by dknguyen

THen spend $800! $3500 is a pretty fancy scope. My problem is I need to observe motor switching waveforms which are square waves, but not "logical" so a logic analyzer won't work and I need a 40MHz+ bandwidth scope.

Why on earth would you need 40MHz bandwidth just for motor switching waveforms?.

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11th April 2008, 01:47 AM	(permalink)
Don Wilson	Up-grade multimeter which ones? I have noticed Sears has on with frequency, would this be good enough for starter projects. It is around $60.00, or what should I get, I have a smaller version of the same meter,without frequency probe. What would you suggest.

11th April 2008, 01:59 AM	(permalink)
jpanhalt	I would look for a cheap scope. A used Velleman HPS5 would certainly be less; a new HPS10 is only $100. John

11th April 2008, 02:09 AM	(permalink)
dknguyen	Get a scope. A PO scope is $200 and is also a bunch of other stuff too like a logic analyzer, signal generator, and spectrum analyzer. It would be much more useful than a simple DMM. http://po.labs.googlepages.com/

11th April 2008, 11:00 PM	(permalink)
Don Wilson	Who makes them, where can I buy one? Very nice photo.

11th April 2008, 11:10 PM	(permalink)
dknguyen	I have no idea where you are, but www.hvwtech.com is one place that sells them.

11th April 2008, 11:27 PM	(permalink)
Don Wilson	I took a look at the site, this is tools and software to attach to pc. Is this a good tool. I am never going to spend 3500 for a scope.

11th April 2008, 11:43 PM	(permalink)
Dean Huster	Don, the February 2008 issue of "EE Evaluation Engineering" (one of those "free to qualified subscriber" magazines) beginning on page 28, has the article "Powerfel and Portable DMMs for 2008". Their web site is http://www.evaluationengineering.com and although this article is not currently posted there, I suspect that it will be. They evaluate 19 different models from 9 manufacturers priced from $55 to $895. The low end generally gives you an accuracy of around ±0.5% while the high-end models are around ±0.025%. I'm not sure that this is an all-encompassing article, for they show only one Fluke model. That's a little questionable. Dean __________________ Dean Huster, Electronics Curmudgeon Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines). R.I.P.