Campbell-scientific CSIM11 pH and ORP Sensors Manual de usuario descargar pdf (Pagina 27)

Appendix B. Example Programs

B.1 CRBasic Program

The following CR1000 program measures a CSIM11 and 107 temperature

probe and has the datalogger process the raw data after each measurement

sequence.

'CR1000 Series Datalogger

'declare variables

Public pH, pHMult, TempC

'Define Data Tables

DataTable (pH,1,-1)

DataInterval (0,1,Min,10)

Sample (1,pH,FP2)

Sample (1,TempC,FP2)

EndTable

'Main Program

BeginProg

Scan (60,Sec,0,0)

'measure water temperature

Therm107 (TempC,1,3,Vx1,0,250,1.0,0)

'calculate the Multiplier for Temperature Correction

pHMult = -1/ (((TempC + 273) / 298) * 59)

'measure pH (note this is without the multplier and offset)

VoltDiff (pH,1,mV2500,1,True ,0,_60Hz,1.0,0)

pH=pH*pHMult 'now apply Correction Multiplier to measured pH

pH=pH + 7 '... and the offset -- initially with a value of 7, adjusting as

'necessary during probe calibration

CallTable pH 'output data once per minute

NextScan

EndProg

B-1

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Campbell-scientific CSIM11 pH and ORP Sensors Manual de usuario Pagina 27