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???
05/03/08 15:14
Modified:
  05/03/08 15:18

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#154345 - Specification
Responding to: ???'s previous message
[pre]Linearity Error <+/-5%
Repeatability <+/-2.5% of full scale (conditioned sensor, 80% force applied)
Hysteresis <4.5% of full scale (conditioned sensor, 80% force applied)
Drift <5% per logarithmic time scale (constant load of 90% sensor rating)
Response Time <5 microseconds
Operating Temperatures 15°F to 140°F (-9°C to 60°C)
Temperature Sensitivity Output variance up to 0.2% per degree F (approximately 0.36% per degree C)[/pre]


Whilst I won't argue with the ranges, or the fairly fast response time, everything else is GRIM. 14 % drift over a reasonable temperature range, "linearity" appalling, hysteresis dreadful...
Drift...

If it says "hysteresis <4.5%" reckon its not 4.4% or they would say it was <4.4%.

Its a force indicator, not what I would trust as a force transducer - adding the errors up, in a worst case situation, the way I always would, and you must be close to a 25% error band.

Steve

List of 24 messages in thread
TopicAuthorDate
Flexiforce sensor and chip            01/01/70 00:00      
   op-amp output is what you will get            01/01/70 00:00      
      Correct            01/01/70 00:00      
         'typical' job for a '51            01/01/70 00:00      
         PLC            01/01/70 00:00      
            sounds like a plan            01/01/70 00:00      
   Have you noticed, ...            01/01/70 00:00      
      It is but ...            01/01/70 00:00      
         Stretching the inverting amplifier is crap!            01/01/70 00:00      
      I Agree; This Sensor is...            01/01/70 00:00      
         Dimensional Constraints            01/01/70 00:00      
            Never say never....            01/01/70 00:00      
               load cell <> strain gauge            01/01/70 00:00      
               Its hard some times            01/01/70 00:00      
                  Terminology            01/01/70 00:00      
                     Flexiforce            01/01/70 00:00      
                        Specification            01/01/70 00:00      
                           I think it is great            01/01/70 00:00      
                              Ejector seat ?            01/01/70 00:00      
                                 With what sitting in the seat?            01/01/70 00:00      
                                    Anything            01/01/70 00:00      
                                       Even moderators?            01/01/70 00:00      
                           what else would anyone expect from an FSR            01/01/70 00:00      
                              Well.            01/01/70 00:00      

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