Up-grade multimeter which ones?

[Don Wilson]

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]

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

 

[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/

 

[Don Wilson]

Who makes them, where can I buy one?

Very nice photo.

 

[dknguyen]

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

 

[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.

 

[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 https://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]

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]

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?.