Thermo-Hygrometer - Measurement of 10DegC @10%RH

#1
Hi ,
I am using a thermo-hygrometer(with external sensor)in Climatic testing in climatic chamber , where my product is tested at 10DegC with 10%RH , but my thermo-hygrometer is calibrated in 10%RH , 50%RH , 95%RH @25DegC and at temperature values of 5DegC , 25DegC 50DegC without humidity control . Can i use this thermo-hygrometer for measurement of 10DegC @10%RH. or i need to calibrate the instrument at 10DegC 10RH?
 
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dwperron

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#2
Your thermo-hygrometer uses separate sensors for temperature and humidity. Because of this, if the humidity sensor was calibrated at 10% the result should be valid over the full temperature range.
 
#4
But I still stuck in a thought, the humidity is different in different temperatures so how a calibration of sensor at 3 points at one temperature is enough.
 

dwperron

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#5
But I still stuck in a thought, the humidity is different in different temperatures so how a calibration of sensor at 3 points at one temperature is enough.
Typically, the thermistors used in these devices are stable performers and prove to be much more reliable than the humidity sensors.
A 15°C deviation from the calibration point should not be considerable.
 
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