KH20 Krypton Hygrometer
'*** Variables ***
Public panel_temp
Public batt_volt
Public kh(2)
Public rho_w
Alias kh(1) = kh_mV
Alias kh (2) = ln_kh
Units panel_temp = deg_C
Units batt_volt = volts
Units kh_mV = mV
Units ln_kh = ln_mV
Units rho_w = g/m^3
'*** Data Output Tables ***
'Processed data
DataTable (stats,True,-1)
DataInterval
(0,OUTPUT_INTERVAL,Min,10)
Minimum
(1,batt_volt,FP2,False,False)
Average
(1,panel_temp,FP2,False)
Average
(2,kh(1),IEEE4,False)
EndTable
'Raw time-series data.
DataTable (ts_data,True,-1)
DataInterval
(0,SCAN_INTERVAL,mSec,100)
Sample
(1,kh_mV,IEEE4)
EndTable
'*** Program ***
BeginProg
Scan
(SCAN_INTERVAL,mSec,3,0)
'datalogger
panel
temperature.
PanelTemp
(panel_temp,250)
'Measure
battery
voltage.
Battery
(batt_volt)
'Measure
KH20.
VoltDiff
(kh_mV,1,mV5000,1,TRUE,200,250,1,0)
ln_kh = LOG(kh_mV)
rho_w = ln_kh/xkw
CallTable
stats
CallTable
ts_data
NextScan
EndProg
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Summary of Contents for KH20
Page 18: ...Appendix A Calibrating KH20 A 4...
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