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???
10/12/10 19:03
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 		 #179072 - linearing only solves one issue
Responding to: ???'s previous message
It just makes the steps the same size. I does not give you 1410. You need to put the thermistor in a spreadsheet. Remember you are not going to get rail to rail on a thermistor. And if you bias it with just a resistor you may get .1C at one end but 1C at the other.
maybe a selection of different divider resistors.
And remember the fluke does not have any beter accuracy then the thermistor it is using.

List of 24 messages in thread
TopicAuthorDate
Measure temperature @0.1deg resolution using thermistor            01/01/70 00:00      
   Sorry - doesn't work            01/01/70 00:00      
      Thermistors aren't such bad...            01/01/70 00:00      
         Remember the original requirement of 0.1°C            01/01/70 00:00      
   Resolution is not there...            01/01/70 00:00      
      What about the Termistor            01/01/70 00:00      
      RE: Resolution is not there...            01/01/70 00:00      
         one-wire sensors are still quite expensive than thermistors            01/01/70 00:00      
            Thermistor Vs one-wire sensor cost            01/01/70 00:00      
               Your processor has a voltage reference good enough?            01/01/70 00:00      
                  Voltage reference            01/01/70 00:00      
                     That voltage reference has large error...            01/01/70 00:00      
                  Vref is Not Needed            01/01/70 00:00      
                     Depends            01/01/70 00:00      
                        Ah but,            01/01/70 00:00      
                           Still not trivial            01/01/70 00:00      
         The normal fluke doesn't give 0.1C correct readings            01/01/70 00:00      
         I think your customer ...            01/01/70 00:00      
            quite common problem with resolution/precision            01/01/70 00:00      
         linearing only solves one issue            01/01/70 00:00      
            Precision            01/01/70 00:00      
               hm            01/01/70 00:00      
               Not an opamp            01/01/70 00:00      
               Comparison with Fluke a big problem            01/01/70 00:00      

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