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Overunity Machines Forum



Partnered Output Coils - Free Energy

Started by EMJunkie, January 16, 2015, 12:08:38 AM

Previous topic - Next topic

0 Members and 221 Guests are viewing this topic.

tinman

1 volt across .001 ohm's is 1000 amp's or 1000 watt's.
1 volt over 0 ohms is an infinite amount of power.

That third decimal really seems to make a huge difference there ;)

ayeaye

Nonsense, you can trust the last digit of the multimeter, they are not that inaccurate. The specs are only such so that the manufacturer will not have any responsiility in the case of a faulty multimeter or such. Responsibility is expensive for the manufacturer, thus only with more expensive devices can they afford that. And the specs are such that by them the multimeter is also almost useless with these specs. That the people who know more, and can read the specs, would buy much more expensive multimeters, so the manufacturers get more profit.

This had to be said here, because the people who do free energy experiments, usually have a cheap equipment. Cheap equipment that is still useful.

Btw, the multimeters that have the number 830 in their name, all seem to have the exact same chip, and these are the cheapest $5 ones, up to some $20 ones, the difference is only in the case and probes. The cheapest that they give away in harbor freight for free, one should avoid though, as it has an additional trimmer for calibration, which further decreases accuracy. Otherwise the accuracy is likely mostly determined by the precision of the resistor that is in series with the chip. In these cheap multimeters, the AC voltages though go directly to the chip, as much as i know.

But, if you have a multimeter with these probes where the wire is not fixed to the back of the probe, make sure to fix the back of the probe with an insulating tape. Because otherwise, the wire pumps out of the probe when going against the edge. Exact the same way as a hand driven water pump works. Recently they have replaced better probes in many multimeters with these cheap chinese ones. A great chinese innovation.

picowatt

Quote from: ayeaye on October 22, 2015, 07:32:16 AM
Nonsense, you can trust the last digit of the multimeter, they are not that inaccurate. The specs are only such so that the manufacturer will not have any responsiility in the case of a faulty multimeter or such. Responsibility is expensive for the manufacturer, thus only with more expensive devices can they afford that. And the specs are such that by them the multimeter is also almost useless with these specs. That the people who know more, and can read the specs, would buy much more expensive multimeters, so the manufacturers get more profit.

That has not been my experience.   I do agree that often the stated specs are worst case and over the full temp range to keep the manufacturer "off the hook".  However, specs are also sometimes stated or tested in such a way as to make them look better than they actually are just to sell meters.  I check all my meters here when I have a 6.5 digit calibrated.  Having done so several times, I rarely put much faith in the last digit on most meters, or even last two digits on some meters.

The only way to know for certain whether the stated specs are "nonsense" or not is to calibrate or verify the instrument using a more precision instrument or a calibration standard.

Quote

This had to be said here, because the people who do free energy experiments, usually have a cheap equipment. Cheap equipment that is still useful.


Of course that equipment is useful.  But when the required precision is greater than what the manufacturer states they are willing to stand behind, or when a measurement seems amiss, one must check calibration or verify the measurement. 

If your measurements produce a calculated efficiency of 150% with a margin of error that is +/- 10%, that looks pretty convincing.  But if the claimed efficiency is 105%, the margin of error will need to be way less than +/- 10% to be convincing or to bring the measurements "out of the noise".     

Quarter watt MF resistors with low TC and 0.1% and 0.01% tolerance are low cost and great for checking ohmmeter calibration.  There are also some low cost voltage references available with decent precision and temp stability that are also quite handy for calibration or verification.     

PW

ayeaye

Well, let's see. 20V range, +-0.5% of reading, +-3 digits. Whatever is greater, i guess. Even when it shows only one decimal place? So i think the second number is absurd, and should be ignored. It indicates like the chip is a complete scrap, but the chip cannot be that bad. This number i think is there only to release the manufacturer from all responsibility. Anyway it's absurd, and thus cannot be taken seriously. I think it can be considered that the percentage is the real error. This is the error coming mostly from the precision of the resistors, contacts, probes, and other analog parts. These give a percentage error. The chip and its analog to digital converter is most likely more precise than that.

MileHigh

Quote from: ayeaye on October 22, 2015, 12:22:39 PM
Well, let's see. 20V range, +-0.5% of reading, +-3 digits. Whatever is greater, i guess. Even when it shows only one decimal place? So i think the second number is absurd, and should be ignored. It indicates like the chip is a complete scrap, but the chip cannot be that bad. This number i think is there only to release the manufacturer from all responsibility. Anyway it's absurd, and thus cannot be taken seriously. I think it can be considered that the percentage is the real error. This is the error coming mostly from the precision of the resistors, contacts, probes, and other analog parts. These give a percentage error. The chip and its analog to digital converter is most likely more precise than that.

You don't have to be so cynical about something as basic as a multimeter.  The designers of the device know that they are making a measuring device and it has limitations and they will state what those limitations are.  If you want a more precise device then you pay more for a better piece of equipment, simple as that.  For a $5 digital multimeter, you might not even see the specs.  However, nobody is going to design an iPhone using $5 multimeters.

Liability probably doesn't come into play.  If you are a designer and manufacturer of a device that requires the use of measuring equipment, that is probably your responsibility.  Perhaps there have even been court cases about this issue, I don't know.

The important thing to realize here is that it's entirely possible that the last digit of precision on your digital multimeter is most likely junk.  The one-hundredth of a second measurement of a hand-held digital stopwatch is junk and shame on the manufacturers of stopwatches, physical and virtual, for doing this.  Also, working with your error margins and understanding the number of significant figures in your data is critical and can't be ignored if you are trying to make precise over unity measurements.  Like I said before, high school students will do this in their chemistry and physics lab reports, why can't the people in the free energy community do it when they are talking about very slight over unity measurements?