Campbell-scientific CMP6-L, CMP11-L, and CMP21-L Pyranometers Instrukcja Użytkownika Pobierz pdf (Strona 27)

CMP6-L, CMP11-L, and CMP21-L Pyranometers

'CR1000 Series Datalogger

Public PTemp

Public Batt_Volt

Public CMP11_Irr

Units CMP11_Irr = W/m2

DataTable (TenMin,1,-1)

DataInterval (0,1,Min,4)

Minimum (1,Batt_Volt,FP2,0,False)

Sample (1,PTemp,FP2)

Average (1,CMP11_Irr,FP2,False)

StdDev (1,CMP11_Irr,FP2,False)

EndTable

BeginProg

Scan (1,Sec,0,0)

'Measure the Battery Voltage and Panel Temperature

PanelTemp (PTemp,250)

Battery (Batt_Volt)

'Measure the CMP11

VoltDiff (CMP11_Irr,1,mV25C,2,True ,10000,_60Hz,1000/8.55,0)

CallTable TenMin

NextScan

EndProg

7.3.3.3 CR1000 Example Program for Measuring a CMP21

Although this example is for the CR1000, other CRBasic dataloggers are

programmed similarly. The following program measures the CMP21 every

second. It converts the pyranometer’s millivolt output to W•m

–2

. A

pyranometer calibration of 8.65 µV / W•m

–2

is used for the example program.

The resistance of the internal thermistor is converted to degree Celsius and then

to Kelvin. Every 10 minutes, the program outputs the average and standard

deviation of the flux (W•m

–2

) measurements and temperature measurements.

Wiring for this example is given in TABLE 7-8.

TABLE 7-8. CR1000 Wiring for CMP21 Example Program

Wire Color Description CR1000 Jumper*

White Solar Signal (+) 3H

Blue Solar Signal (–) 3L

Yellow Voltage Excitation VX1

Black Temp Signal 15 SE

Brown Signal Reference

Clear Shield

* Jumper 3L to

with user-supplied 26 AWG or larger wire.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 41 42

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Campbell-scientific CMP6-L, CMP11-L, and CMP21-L Pyranometers Instrukcja Użytkownika Strona 27

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