A3C & X-MAGNETS AND PMF.

[citfta]

https://en.m.wikipedia.org/wiki/Multimeter


Modern multimeters are often digital due to their accuracy, durability and extra features. In a digital multimeter the signal under test is converted to a voltage and an amplifier with electronically controlled gain preconditions the signal. A digital multimeter displays the quantity measured as a number, which eliminates[/font][/size] [/font][/size]parallax[/size][/color] [/font][/size]errors.[/font][/size]Modern digital multimeters may have an embedded computer, which provides a wealth of convenience features. [/size][/color]

[/size][/color]
Meaningful (i.e., high-accuracy) measurements require a good understanding of the instrument specifications, good control of the measurement conditions, and traceability of the calibration of the instrument. However, even if its resolution exceeds the accuracy, a meter can be useful for comparing measurements. For example, a meter reading 5½ stable digits may indicate that one nominally 100,000 ohm resistor is about 7 ohms greater than another, although the error of each measurement is 0.2% of reading plus 0.05% of full-scale value.[/size][/color]

And the high-lighted part is what several of us have been trying to get you to understand.  You are NOT using the test equipment the way it was designed to be used.  So your test results mean nothing.  It is as simple as that.

And posting false claims about reporting posters to authorities and having moderator status also does your credibility serious damage.  All of those actions are childish and we have been here long enough to know they are false.

[gyulasun]

Hi ageofmagnetizm,

From the same wiki link you provided,  read this and understand:

"General properties of multimeters:

Any meter will load the circuit under test to some extent. For example, a multimeter using a
moving coil movement with full-scale deflection current of 50 microamps, the highest sensitivity
commonly available, must draw at least 50 microamps from the circuit under test for the meter
to reach the top end of its scale. This may load a high-impedance circuit so much as to affect the circuit,
thereby giving a low reading. The full-scale deflection current may also be expressed in terms of
"ohms per volt". The ohms per volt figure is often called the "sensitivity" of the instrument.
Thus a meter with a 50 microampere movement will have a "sensitivity" of 20,000 ohms per volt.
"Per volt" refers to the fact that the impedance the meter presents to the circuit under test will be
20,000 ohms multiplied by the full-scale voltage to which the meter is set.
For example, if the meter is set to a range of 300 volts full scale, the meter's impedance will be 6 megohms.
20,000 ohms per volt is the best (highest) sensitivity available for typical analog multimeters that lack
internal amplifiers.  For meters that do have internal amplifiers (VTVMs, FETVMs, etc.),
the input impedance is fixed by the amplifier circuit."


Your DMM do have internal amplifiers the text you quoted is correct.  I gave 2 links in my Reply #57 where your DMM is demonstrated and its internal circuits schematics is shown:http://overunity.com/17293/a3c-x-magnets-and-pmf/msg521254/#msg521254 Its internal resistor divider chain insures the high input resistance from at least
480 kOhm to the 980 kOhm range, anyone can see it without turning to Artificial Intelligence.

Gyula

https://en.m.wikipedia.org/wiki/Multimeter
Modern multimeters are often digital due to their accuracy, durability and extra features. In a digital multimeter the signal under test is converted to a voltage and an amplifier with electronically controlled gain preconditions the signal. A digital multimeter displays the quantity measured as a number, which eliminate errors. Modern digital multimeters may have an embedded computer, which provides a wealth of convenience features.

Meaningful (i.e., high-accuracy) measurements require a good understanding of the instrument specifications, good control of the measurement conditions, and traceability of the calibration of the instrument. However, even if its resolution exceeds the accuracy, a meter can be useful for comparing measurements. For example, a meter reading 5½ stable digits may indicate that one nominally 100,000 ohm resistor is about 7 ohms greater than another, although the error of each measurement is 0.2% of reading plus 0.05% of full-scale value.

[ageofmagnetizm]

My gash.


Who's care about internal circuits shematics, simply launching
COMPASS App on smarthone and it shows where North is,
or launching HORIZONT App and it shows which corner of table
is too high, same is with DMM - millions of people simply follows
manuals and read true values displayed, no need to hypotyze how it
works because it is designed with:

an embedded computer, which provides a wealth of convenience features[/size]

[citfta]

My gash.


Who's care about internal circuits shematics, simply launching
COMPASS App on smarthone and it shows where North is,
or launching HORIZONT App and it shows which corner of table
is too high, same is with DMM - millions of people simply follows
manuals and read true values displayed, no need to hypotyze how it
works because it is designed with:
an embedded computer, which provides a wealth of convenience features[/size]

And that is the problem with your testing!  You apparently have NOT read the manual and do NOT understand how to use the test equipment.  And YOU were the one that brought up all the information about the internal workings of the MM when I first told you that cheap ones are not really that accurate.  Your reply was they had a small electronics circuit in them which actually has nothing to do with the accuracy.  They still have to be calibrated correctly.  And my own testing has shown they are SOMETIMES not calibrated that closely to a high quality meter.

[ageofmagnetizm]

Guys,


Why dont you file complain to consummers commission explaining that
manufacturers of DMMs are misleeding whole world, or discuss stuff on wikipedia or
bring your multimeters problems to numerous topics dedicated to such discussion,
or simply take care about own topics which you've abandoned by posting just here.


How many times one need to be asked to do the same.