XPost: sci.electronics.equipment   
   From: CFKinsey@military.org.jp   
      
   On Sat, 20 Jun 2020 16:24:41 +0100, Ralph Mowery    
   wrote:   
      
   > In article , CFKinsey@military.org.jp says...   
   >>   
   >> I'd need to contract OCD to understand that.  There's only one thing in   
   question here, how close is the reading to the correct value.  You can't split   
   that into two.  3.1416 is better than 3.14, and that's it.  All you can state   
   with a reading is it's    
   correct to within a certain percentage.   
   >   
   > Try this.   
   >   
   > A doctor does a very complicated operation on your left arm like a joint   
   > replacement.  It all goes very well.  Very precise.   
   >   
   > However he should have done the operation on the right arm that was   
   > causing trouble.  Not accurate.   
      
   Nope, because the first one is 100% useless.  I wouldn't call that precise at   
   all, as he was out by half a metre.   
      
   > That is why a voltmeter can show 3 digits and be accurate to only the   
   > last digit being in question by one number either way, but a 5 digit   
   > volt meter can show many numbers, but if it is not calibrated corrctly   
   > the 2nd digit to the 5 th digit  could be way off and the meter not   
   > accurate at all.   
      
   Showing those extra two numbers is pointless if they're wrong.  All that   
   matters is how many volts difference between the actual voltage and what is   
   shown.   
      
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