Controlling An Am16/32B Multiplexer - Campbell CDM-A100 Series Instruction Manual

B.3 Controlling an AM16/32B Multiplexer
CRBasic Example B-3. Controlling an AM16/32B Multiplexer
'Program to make 32 differential measurements through an AM16/32B multiplexer
'controlled by a CDM-A108
'Wiring
'==============
'**Set AM16/32B to 2x32 mode**
'Sensor
'Function Terminal
'-------- --------
'High H
'Low L
'Ground Ground Symbol
'AM16/32B CDM-A108
'Terminal Terminal
'-------- --------
'RES SW5-2
'CLK SW5-1
'G G
'12V 12V
'COM ODD H 1H
'COM ODD L 1L
'COM Ground Ground Symbol
'Declare Variables and Units
Dim LCount
Public MilliVolts(32)
DataTable(Table1,True,-1)
DataInterval(0,10,Min,10)
Average(32,MilliVolts(),FP2,False)
EndTable
'Main Program
BeginProg
'Main Scan
Scan(1,Min,3,0)
'Turn AM16/32B Multiplexer on, and advance to first channel
CDM_MuxSelect(CDM_A108,1,1,2,20,1,1)
LCount=0 'reset loop counter
SubScan(0,uSec,32)
LCount+=1 'increment loop counter
'Differential measurement on the AM16/32B Multiplexer
CDM_VoltDiff(CDM_A108,1,MilliVolts(LCount),1,mV5000,1,True,5000,60,1.0,0)
'Switch to next AM16/32B Multiplexer channel
CDM_PulsePort(CDM_A108,1,1,20000)
NextSubScan
'Turn AM16/32B Multiplexer Off
CDM_SW5(CDM_A108,1,2,0,0)
Delay(0,150,mSec)
'Call Data Tables and Store Data
CallTable Table1
NextScan
EndProg
The following program makes 32 differential measurements through an
AM16/32B multiplexer controlled by a CDM-A108 connected to a CR6
datalogger. With slight modifications, this program can be used with the CDM-
A116 or CR800 series, CR1000, and CR3000 dataloggers.
Appendix B. Example Programs
B-3