Campbell-scientific 110PV Surface Temperature Probe Bedienungsanleitung PDF herunterladen (Seite 21)

110PV Surface Temperature Probe

'Define a data table for 10 minute averages

DataTable (AvgTemp,1,1000)

DataInterval (0,10,Min,10)

Average (1,T110PV_Temp_C,FP2,False)

EndTable

BeginProg

Scan (1,Sec,3,0)

' Measure 110PV-L probe

BrHalf4W (T110PV_mV,1,mV2500,mV2500,1,Vx1,1,2500,True,True,0,_60Hz,1.0,0)

' Convert mV to ohms

T110PV_Res=4990 *T110PV_mV

' Use the Steinhart-Hart equation to convert resistance to temperature

T110PV_Temp_C = (1/(A+B*LOG(T110PV_Res)+C*(LOG(T110PV_Res))^3))-273.15

'Convert Celsius to Fahrenheit

T110PV_Temp_F = T110PV_Temp_C * 1.8 + 32

CallTable AvgTemp

NextScan

EndProg

5.2 Edlog

In Edlog, Instruction 5 is typically used to measure the 110PV-L. The ratio

metric output is then converted to resistance and finally to temperature (see

Section 5.2.1).

5.2.1 Example Edlog Program

TABLE 5-2. Wiring for Example Program

Color Description CR10X

Black Voltage Excitation E1

Red Signal SE1

Purple Signal Reference AG

Clear Shield G

Blue Not Used Not Used

Green Not Used Not Used

White Not Used Not Used

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 31 32

Keine Kommentare

Campbell-scientific 110PV Surface Temperature Probe Bedienungsanleitung Seite 21