General > General Technical Chat

Not all meters are created equal

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armandas:
Just got this tiny multimeter of ebay and.. I love it! It makes me smile whenever I pick it up, really funny thing.

Here is a fun fact: the probe leads are rated (105 C, 600V, 24AWG) whereas Fluke probes do not have any info printed on them :)

saturation:
Congratulations.  Why not test it for us against your Fluke?  Compare accuracy, precision, and its other specs.  You can tell then for sure if its capability is true to its published spec or if being small is really all its prime feature is.

I've had this Radio Shack DMM for a while, its 'rugged' and pocket-able for field use in a very abusive environment: water filled cave sites.



I just recalibrated it against my Fluke 87, as I noticed it was fairly off by a consistent amount for any range.  Better now, but testing all ranges to near extremes its no where close to the Fluke.  Its great for trending and especially in DCV, but not for accuracy against a standard.

armandas:
If we take Fluke as a reference, the pocket meter is within the specs (2.5%, but usually better) on most ranges.
Square wave generator is supposed to output 3Vpp 50Hz, but gives something like 3.7Vpp 60Hz :)

But yeah, the main feature is the size.

alm:
Not sure what the deal is with the printing on the wires. As long as you trust the manufacturer's rating of the complete probe, you should trust that the individual components match those specs. If you don't trust the manufacturer's rating, don't buy their stuff. There's plenty of ways to screw-up you can't easily test, so you better trust them to do a good job. Nothing wrong with verifying the manufacturer's claims, but insisting that it's somehow an important feature seems silly.

armandas:

--- Quote from: shafri on June 05, 2010, 02:29:44 pm ---
--- Quote from: armandas on June 05, 2010, 12:08:06 pm ---Just got this tiny multimeter of ebay and.. I love it! It makes me smile whenever I pick it up, really funny thing.

--- End quote ---
why did u buy it?

--- End quote ---
I wanted to have a pocket meter. Also, it was less than £5.


--- Quote from: alm on June 05, 2010, 03:01:01 pm ---Nothing wrong with verifying the manufacturer's claims, but insisting that it's somehow an important feature seems silly.

--- End quote ---
Exactly.

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