XPost: sci.electronics.equipment   
   From: CFKinsey@military.org.jp   
      
   On Fri, 19 Jun 2020 23:55:42 +0100, Ralph Mowery    
   wrote:   
      
   > In article , CFKinsey@military.org.jp says...   
   >>   
   >> But what I'm surprised at is a £5 multimeter (not clamp) not giving a   
   digits error.  Maybe precision on a simple voltmeter is cheap as chips   
   nowadays?   
   >>   
   >>   
   >   
   > You have to be careful how you throw precision and accurecy around.   
   >   
   > A meter that shows 4 digits is more precice than one that shows only 3   
   > digits, however the 4 digit one may only be 1% accurate and the 3 digit   
   > one may be .5% accurate.   
   >   
   > It is easy to get precision, but difficule to be accurate.  Think of it   
   > as shooting a gun.  Precision may be how close the bullets land to each   
   > other where ever they land on the target, but to be accurate the bullets   
   > have to land on the center of the target.  Such as all the bullets could   
   > land very close to each other, but not even hit the target.   
   >   
   > As I mentioned, a good meter will not have a digits error outside the +-   
   > one digit due to rounding.   
      
   That didn't help.  I interchange the two.  I just want to know how close to   
   the correct reading the readout is.  Adding another digit doesn't improve   
   anything if it's incorrect.  And shooting all the bullets in one place doesn't   
   help if they all miss.   
      
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