Campbell CS115 Manuel d'utilisateur télécharger pdf (Page 15)

CS115 Barometric Pressure Sensor

5.1.4 Period Averaging Measurement Example for CR5000 in a Fast

Executing Program at 10Hz

EXAMPLE 4. Sample Program for CR5000

‘CR5000

'Sample Program to Measure CS115 Barometric Pressure Sensor

Public CS115_Freq, Pressure

Units Pressure = mb

BeginProg

Scan (100,mSec,3,0)

'Turn CS115 ON one minute before every hour

If (IfTime (59,60,min)) Then WriteIO (1,1)

'Period Avgeraging instruction must be executed every scan, and

'cannot be inside the "If" statement. The measured value, therefore, is

'first written into a temporary variable called "CS115_Freq".

PeriodAvg (CS115_Freq,1,mV5000,33,0,1,10,20,1.0,0)

'Once CS115 is turned on one minute before every hour, and

'the correct measurement is made, it is copied into the current variable

'called "Pressure". The sensor is, then, turned off.

If IfTime(0,60,min) Then

Pressure = CS115_Freq

'Turns CS115 OFF

WriteIO (1,0)

EndIf

NextScan

EndProg

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Campbell CS115 Manuel d'utilisateur Page 15