Products > Test Equipment

How good DC voltage standard do you need?

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implor:
I have the opportunity to buy a DC voltage standard for ~350USD.

It has +/- 0.02% on all ranges (10mV-10V and 1mA to 100mA).

My question is if 0.02% really is good enough for calibrating anything other then $10 multimeter.

Main goal was to have it for calibration but of coarse there is other uses.
 
What do you say? worth the investment or not? 

tggzzz:

--- Quote from: implor on February 01, 2024, 08:47:44 am ---I have the opportunity to buy a DC voltage standard for ~350USD.

It has +/- 0.02% on all ranges (10mV-10V and 1mA to 100mA).

My question is if 0.02% really is good enough for calibrating anything other then $10 multimeter.

Main goal was to have it for calibration but of coarse there is other uses.
 
What do you say? worth the investment or not?

--- End quote ---

Only you can decide cost-benefit tradeoffs.

Your spec is inadequate: it should also include drift over time and temperature.

Most importantly, is traceability required, and what is the penalty for an incorrect calibration?

implor:
That is true.

Main thing is peace of mind for myself that my instruments are within reasonable values.

I may have to think more about what i need and want.

J-R:
Just taking the accuracy spec at face value, you're basically spot on, maybe good enough for a 2,000 count DMM.  Anything higher and your last digit on the DMM will not be valid.

The $90USD LB01/LB02 published specs are 0.025%+1 digit (although only 24mA).

So $350 seems a little steep by comparison, but real world performance is unknown.

One issue is that test equipment can frequently be far better or worse than the specs.  For popular products, you can get an idea of what to expect from other forum users.

From mostly a practical perspective, I'd suggest buying a decent bench DMM that you can get calibrated regularly instead.  Generating stable voltages and currents is actually very trivial in my opinion, but you need an accurate DMM to go with along with that.

Wrenches of Death:

--- Quote from: implor on February 01, 2024, 09:27:20 am ---
Main thing is peace of mind for myself that my instruments are within reasonable values.


--- End quote ---

BINGO!

WoD

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