Campbell CVF4 Manual de instrucciones descargar pdf (Pagina 28)

CMP6-L, CMP10-L, CMP11-L, and CMP21-L Pyranometers

BeginProg

Scan (1,Sec,0,0)

‘Measure the Battery Voltage and Panel Temperature

PanelTemp (PTemp,250)

Battery (Batt_Volt)

‘Measure the CMP21 pyranometer

VoltDiff (CMP21_Irr,1,mV25C,3,True,10000,_60Hz,1000/8.65,0)

'CMP21 Thermistor Measurement

BrHalf (Vs_Vx,1,mV5000,15,Vx1,1,2500,True ,0,250,1.0,0)

Rs = 1000*(Vs_Vx/(1-Vs_Vx))

CMP21_T_C = 1/(1.0295e-3+2.391e-4*LN(Rs)+1.568e-7*(LN(Rs))^3)-273.15

'Convert CMP21 temp to Kelvin.

CMP21_T_K = CMP21_T_C+273.15

CallTable TenMin

NextScan

EndProg

7.3.3.4 CR10X Example Program for Measuring a CMP6

The following program uses a CR10X to measure a CMP6 every 10 seconds

and convert the mV output to W•m

–2

and MJ•m

–2

. A sensor calibration of

14.33 μV / W•m

–2

is used for this example program. The program outputs an

hourly average flux (W•m

–2

), and a daily total flux density (MJ•m

–2

Wiring for the example is given in TABLE 7-9able 7-9.

TABLE 7-9. CR10X Wiring for CMP6 Example Program

Wire Color

Description

CR10X

Jumper*

White

Solar Signal (+)

Black

Solar Signal (

–)

Clear

Shield

* Jumper 1L to AG terminal on CR10X with user-supplied 26 AWG or larger

wire.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 41 42

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Campbell CVF4 Manual de instrucciones Pagina 28

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