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Topic: MLX90614 vs MLX90247

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Jason Hessler

Posted 3 September at 3:22PM  Edit      Reject because  



Joined: 3 September 2008
Location: US
Posts: 2

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Hello, I need to measure the temperature of an object accurately to within 0.3C from 0C to 40C. The 90614 can not quite do that. My question is then is it possible to obtain that accuracy by performing a two point calibration of the MLX90247 as part of a system. The difference between ambient and object temperature will be between 0C-25C. Thanks Jason


Luc Buydens

Posted 3 September at 3:58PM  Edit      Reject because  

Melexis  Moderator

Joined: 7 December 2005
Location: BE
Posts: 83

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Hi,

I expect that will be extremely difficult and I would not advise it.

Regards,

Luc


Jason Hessler

Posted 3 September at 4:54PM  Edit      Reject because  



Joined: 3 September 2008
Location: US
Posts: 2

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Hello,

I currently obtain approx. 1C accuracy with a single point calibration at room temp. What factors cause this to be extremely difficult? If I can accurately maintain a blackbody at a specific temperature? or can the technology in general not obtain that?

Thanks
Jason


Luc Buydens

Posted 4 September at 7:10AM  Edit      Reject because  

Melexis  Moderator

Joined: 7 December 2005
Location: BE
Posts: 83

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1C over the whole range is already qutie good. Obtaining that under all circumstances is not trivial.
One normally has to calibrate also the internal thermistor with measurements at a few points.

Regards,

Luc


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