Campbell Scientific OBS500 Smart Turbidity Meter with ClearSensor Technology - Manual (Page 59)

Appendix B. Example Programs
B.4.2 Cycle Shutter/Wiper for Each Measurement CR1000
Program
The following CRBasic program will:
• Open the shutter if closed, then make a measurement
• Make a measurement if open, then close
Shutter/wiper cycles will be cut by 50%. This will reduce wear and power
consumption 50% but still leave the optics shuttered 50% of the time.
'CR1000 Series Datalogger
'OBS500 cycle shutter each measurement
'Declare Public Variables
Public OBS500(4)
Public obsDatOpen(4),obsDatClose(4)
Public Open
'Declare Other Variables
Alias OBS500(1) = turb_bs
Alias OBS500(2) = turb_ss
Alias OBS500(3) = tempC_obs500
Alias OBS500(4) = wet_dry
Alias obsDatOpen(1) = Open_counts 'Full movement of slider is about 20,000 counts. If it jams this # will be smaller
Alias obsDatOpen(2) = Open_Max_mA_cnts ' Number of times the shutter stops while opening because of max current
Alias obsDatOpen(3) = Open_slip 'Open timeout count. If the threads are stripped the slide will not move and this count will increase
Alias obsDatOpen(4) = Open_mA ' mA current of the motor
Alias obsDatClose(1) = Close_counts 'Full movement of slider is about 20,000 counts. If it jams this # will be smaller
Alias obsDatClose(2) = Close_Max_mA_cnts ' Number of times the shutter stops while opening because of max current
Alias obsDatClose(3) = Close_slip 'Open timeout count. If the threads are stripped the slide will not move and this count will increase
Alias obsDatClose(4) = Close_mA ' mA current of the motor
Units turb_bs = fbu
Units turb_ss = fnu
Units tempC_obs500 = degC
Units wet_dry = YesNo
'Define Data Tables
DataTable (Test,1,1000)
DataInterval (0,5,Min,10)
Sample (1,turb_bs,FP2)
Sample (1,turb_ss,FP2)
EndTable
'Main Program
BeginProg
Scan (60,Sec,0,0)
'If open make measurement and close. If closed, open then make measurement.
If Open = 1 Then 'If open the make measurement, then close
SDI12Recorder(OBS500(),1,0,"M4!",1,0)' Measure without moving the wiper
SDI12Recorder (obsDatClose(),1,0,"M7!",1,0)'Close wiper
Open = 0
Else ' if closed
SDI12Recorder (obsDatOpen(),1,0,"M3!",1,0)' Open wiper
Delay (0,11,Sec)
SDI12Recorder(OBS500(),1,0,"M4!",1,0)' Measure without moving the wiper
Open = 1
EndIf
'Call Output Tables
CallTable Test
NextScan
EndProg
B-5