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| A very interesting site to compare certain multimeters |
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| Lightages:
This person has put together a rather informative way of comparing multimeters. Perhaps he will add more in the the future. The one thing, it appears to be a comparison of samples of one. As interesting as this is, it cannot represent the true statistical accuracy of any certain model. http://www.johannes-bauer.com/electronics/mmcomparison/app/index.html |
| alm:
Looks cool, but the value is somewhat limited in my opinion. As you state, n=1 makes the significance of the differences almost zero. It would also be better to have several measurements over the life of the instrument. I find it interesting that there is no uncertainty in the errors, is the source that good that uncertainty is insignificant compared to the error? I kind find any mention of the source and its uncertainty. But it's not like I've made anything better, and I'm sure it will be used for arguing which multimeter is better, despite the issues. |
| EEVblog:
This is what everyone seems to complain about my review - "why don't I compare it with a reference to see how "accurate" it is?" Yup, sample size of 1... And when I do for whatever reason they scream "see, the cheapo meter is more or just as "accurate" as the expensive meter!" Dave. |
| Rufus:
--- Quote from: alm on August 06, 2011, 08:53:30 pm ---Looks cool, but the value is somewhat limited in my opinion. As you state, n=1 makes the significance of the differences almost zero. --- End quote --- There is no n=1. He hasn't measured any meters. The site lets you graphically compare manufacturers specifications across the full measurement range. It shows you the combined effect of counts, full scale and 'digits' accuracy. Very useful, but, you still have to decide how much you trust specifications from the different manufacturers. |
| Lightages:
--- Quote from: Rufus on August 07, 2011, 03:47:51 am ---There is no n=1. He hasn't measured any meters. The site lets you graphically compare manufacturers specifications across the full measurement range. It shows you the combined effect of counts, full scale and 'digits' accuracy. Very useful, but, you still have to decide how much you trust specifications from the different manufacturers. --- End quote --- Aha, you are right. I skimmed the description and assumed.... well you know what happens when you assume. Still an interesting way to look at the specs at least. |
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