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scale/offset for SR11-05


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#1 vinhquyen

vinhquyen

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Posted 02 June 2015 - 08:20 AM

Hello Sir,

 

I am using SR11-05 sensor in the first

The information of sensor:

Calibration result: - sensittivity: S= 20.67 x 10^-6 V /(W/m2) ; Calibration uncertainty +- 0.28 x 10^-6 V /(W/m2)

In this case, Can i use the formula " scale factor = 119.21 / Calibration sheet number" ? 

(S = 119.21 / 20.67 = 5.76; offset=0)

 

Please help me

 

Thank you very much

 

vinhquyen


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#2 vinhquyen

vinhquyen

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Posted 02 June 2015 - 02:02 PM

Hello Sir,

I am so sorry for mistaking.

In this case, scale= 29.86 /20.67= 1.445; offset=0

Best regards,
Vinhquyen

#3 Pearse Corcoran

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Posted 02 June 2015 - 02:13 PM

Hello Vinhquyen,

 

Thank you for your post.

 

To properly scale thermopile sensors you need to consult the "Scaling_Thermopile_Sensors_AppNote.pdf". I'm not attaching it here because the information may change overtime and post may not be updated with the most recent version. Please refer to our website or email support@rnrgsystems.com for a current copy.

 

With a Hukseflux SR11, you'll need to use a "SCM Constant" of 29.875 and divide by the sensors calibration (sensitivity) value.

 

Scale Factor = SCM Constant / Sensitivity.

 

Scale Factor = 29.875 / 20.67 = 1.445.

 

The offset will be 0.

 

Please contact support@rnrgsystems.com with any further questions.

 

Thank you!

 

Pearse

 

 

#4 Pearse Corcoran

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Posted 02 June 2015 - 06:11 PM

You are exactly right Vinhquyen!

 

Pearse





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