Campbell Scientific CNR4 Net Radiometer User Manual
Page 62
Appendix C. CR3000 Program for Measuring Pt-100 Temperature Sensor
C-4
easurement
'PRT (Pt-100) temperature m
Resistance (cnr4_prt_R,1,mV200,8,Ix1,1,1500,True,True,0,_60Hz,1,0)
Rs_R0 = cnr4_prt_R/100
PRT (cnr4_T_C,1,Rs_R0,1,0)
'Convert CNR4 temperature to Kelvin
cnr4_T_K = cnr4_T_C+273.15
'Correct the long-wave radiation values from pyrgeometers
long_up_corr = long_up+5.67e-8*cnr4_T_K^4
long_dn_corr = long_dn+5.67e-8*cnr4_T_K^4
'Compute short-wave net radiation
Rs_net = short_up - short_dn
'Compute long-wave net radiation
Rl_net = long_up - long_dn
'Compute albedo
albedo = short_dn/short_up
'Compute net radiation
Rn = Rs_net + Rl_net
CallTable cnr4_data
CallTable cnr4_ts
NextScan
EndProg
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