Electronics > Beginners

Why do I need more than 1 multimeter?

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Brumby:

--- Quote from: Berni on July 23, 2019, 12:13:18 pm ---... And this is how volt nuttery starts.

--- End quote ---

Starts - and continues .... (and, no, it never ends.)

Rick Law:

--- Quote from: Berni on July 23, 2019, 12:13:18 pm ---Well there is still a benefit to having only 1 multimeter. When you measure something being 10V you accept it as being 10V

If you have 2 multimeters and one shows 10V and other shows 9.998V... so which meter is accurate. Now you need a 3rd one to check, but then that meter shows 9.999V. And this is how volt nuttery starts.

--- End quote ---

With that logic, why not have none?  You just estimate and you can't be proven wrong.

Three.  That is my magic number.   Normally, I measure with my lone "good one" (UT61E).  The other two are cheap DT820's.  They are generally for when I work with power related.  In those cases, I like to know Vin-Vout, or V & I at the same time.  I also have a few ADS1115 boards (16 bit DAC) along with a few INA219 boards (12 bit DAC) that can be hooked up quickly to take on the V&I measurements.

As to volt-nuts...  I think I recovered from it.  I came to accept - well, until I get a 64 kilo-bit DAC with +-1% accuracy, I would not be truly happy with the results.  But some old German guy call Heisenberg or something like that - this fellow poured cold water on the idea of really really really accurate measurements...

mariush:
It's good to have at least two multimeters, for example to measure input and output voltages , or to measure current while also measuring voltage.

You could also have two multimeters for various functionality you might need.

For example, my main multimeter is a Uni-T UT61E. However, I also bought a Uni-T clampmeter, to measure AC and DC currents without breaking the wires that power devices. As a side functionality, it's also a 2000 count multimeter capable of measuring voltage, resistance, continuity... and it's good enough for some basic measurements.
Then, I also bought a LCR meter, because I wanted to have something capable of measuring inductors... and this one can also measure voltages and resistors and so on...

mindcrime:
The correct number of multi-meters to own is always n+1, where n is the number you currently own...

For more quality advice, visit the TEA thread...  :-+

Additionally, in the first sentence above, you can replace "multi-meters" with any of ( oscilloscopes | power supplies | LCR meters | spectrum analyzers | logic analyzers | signal generators | rubidium standards | network protocol analyzers | data acquisition mainframes | pulse generators | insulation testers | modulation domain analyzers | etc) and it remains equally true.  >:D

Brumby:

--- Quote from: mindcrime on July 24, 2019, 02:04:47 am ---The correct number of multi-meters to own is always n+1, where n is the number you currently own...

--- End quote ---

I would like to challenge that.  My current status is at n+2.

In addition to my current holding, I would like to add a bench meter with 4 wire measurement and something like the Uni-T 210E for a DC current clamp meter.  Why? ... Because I don't have them.   ;D

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