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???
12/03/04 23:41
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#82511 - Constant vs Percentage error
Responding to: ???'s previous message
Is the error a constant difference or is it a percentage of the result?Erik


A "constant difference" (or "constant offset") means that the difference between the actual reading and the true value is constant for all values;

A "percentage" means that the difference between the actual reading and the true value is a constant percentage (fraction) of the value - thus the difference betwee the true value and the actual reading will be greater for higher values.

For example:
True   Reading with     Reading with
Value  +1 offset error  +10% error
 1        2               1.1
 2        3               2.2
 3        4               3.3
 5        6               5.5
 8        9               8.8
10       11              11.0
12       13              13.2
15       16              16.5


List of 38 messages in thread
TopicAuthorDate
LPC93X Family A/D Conveter            01/01/70 00:00      
   Where have you looked so far?            01/01/70 00:00      
      Where have you looked so far?            01/01/70 00:00      
         codearchitect            01/01/70 00:00      
             codearchitect            01/01/70 00:00      
               not code            01/01/70 00:00      
                  not code, I thought I needed it            01/01/70 00:00      
                     What are you trying to do            01/01/70 00:00      
                        What are you trying to do            01/01/70 00:00      
                        What are you trying to do            01/01/70 00:00      
               Basics of A/D Converters            01/01/70 00:00      
         "my" Code Architect            01/01/70 00:00      
            "my" Code Architect            01/01/70 00:00      
               Help!            01/01/70 00:00      
                  with what?            01/01/70 00:00      
                     with what?            01/01/70 00:00      
                        how            01/01/70 00:00      
                           Good!            01/01/70 00:00      
                              x volts            01/01/70 00:00      
                                 Vin            01/01/70 00:00      
                                    both of them            01/01/70 00:00      
                                       x volts varies            01/01/70 00:00      
                                          in extreme detail            01/01/70 00:00      
                                             I got it            01/01/70 00:00      
                                                measure it            01/01/70 00:00      
                                                   DVM?            01/01/70 00:00      
                                                      Digital Volt Meter            01/01/70 00:00      
                                                         DVM            01/01/70 00:00      
                                                VREF            01/01/70 00:00      
                                                   VREF            01/01/70 00:00      
                                                      loanguage            01/01/70 00:00      
                                                   Constant vs Percentage error            01/01/70 00:00      
   Off Percentage            01/01/70 00:00      
      percentage            01/01/70 00:00      
   Percentage            01/01/70 00:00      
   Converting Voltage to ASCII            01/01/70 00:00      
      you should know better by now!            01/01/70 00:00      
   I should know by now            01/01/70 00:00      

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