Campbell Scientific CR200/CR200X-series Dataloggers - Manual (Page 96)

Section 9. Programming
Scan () determines how frequently instructions in the program are executed.
Scan has two parameters:
• Interval is the interval between scans.
• Units is the time unit for the interval. Interval is 1sec <= Interval <= 1 day.
CRBASIC EXAMPLE 11. BeginProg / Scan / NextScan / EndProg Syntax
BeginProg
Scan (1,Sec)
Therm109 (TempC(),2,1,Ex1,1.0,0)
CallTable Temp
NextScan
EndProg
9.9 Instructions
In addition to BASIC syntax, additional instructions are included in CRBASIC
to facilitate measurements and store data. CRBASIC Programming Instructions
(p. 93) contains a comprehensive list of these instructions.
9.9.1 Measurement and Data Storage Processing
CRBASIC instructions have been created for making measurements and storing
data. Measurement instructions set up CR200(X) hardware to make
measurements and store results in variables. Data storage instructions process
measurements into averages, maxima, minima, standard deviation, FFT, etc.
Each instruction is a keyword followed by a series of informational parameters
needed to complete the procedure. For example, the instruction used to set an
excitation channel to a specified value is:
ExciteV (ExChan,ExmV)
"ExciteV" is the keyword. Two parameters follow: ExChan, the excitation
channel number to which the voltage should be applied; and ExmV, is the
excitation, in millivolts, to apply to the sensor. The syntax for applying 5000
millivolts to a sensor through excitation channel number 1 is shown in
CRBASIC EXAMPLE. Measurement Instruction Syntax (p. 84).
CRBASIC EXAMPLE 12. Measurement Instruction Syntax
ExciteV (1,mV5000))
84