Campbell CS455 Manual descarregar pdf (Página 23)

CS450/CS455 Pressure Transducer

Keyboard/Display users and SCWIN users can jump ahead to the Maintenance

section.

6.2 Using CRBasic or Edlog

6.2.1 CRBasic Programming

Dataloggers that use CRBasic include our CR200-series, CR800, CR850,

CR1000, CR3000, and CR5000. These dataloggers use the SDI12Recorder()

to read the CS450/CS455. A multiplier of 1.0 and an offset of 0.0 yield water

level in psig and temperature in degrees C.

The SDI12Recorder() instruction has the following form:

SDI12Recorder(Destination, Output String, Multiplier, Offset)

Sample Program for CR200-Series Datalogger

‘CR200 Series

‘Declare the variable for the water level measurement

Public CS450(2)

‘Rename the variable names

Alias CS450(1)=Level

Alias CS450(2)=Temp_C

‘Define a data table for 60 minute maximum and minimums

DataTable(Hourly,True,-1)

DataInterval(0,60,Min)

Maximum(1,Level,0,0)

Minimum(1,Level,0,0)

Maximum(1,Temp_C,0,0)

Minimum(1,Temp_C,0,0)

EndTable

‘Read sensor every 60 seconds

BeginProg

Scan(60,sec)

‘Code for SDI-12 measurements:

SDI12Recorder(CS450,0M!,1,0)

‘Call the data table:

CallTable(Hourly)

NextScan

EndProg

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