Campbell Scientific CS526 ISFET pH Probe - Manual (Page 16)

CS526 ISFET pH Probe
7.2.3 Instruction Descriptions
7.2.3.1 SerialOpen() Instruction
The SerialOpen() instruction has the following syntax:
SerialOpen(ComPort,BaudRate,Format,TXDelay,BufferSize)
ComPort — the datalogger COM port in which the probe is connected.
BaudRate — choose 2400
Format — choose 16, which is TTL Logic; No parity, one stop bit, 8 data
bits; No error checking
TXDelay — enter 0
BufferSize — enter at least twice the number of maximum expected
characters + 1, which is 41.
7.2.3.2 SerialOut() Instruction
The SerialOut() instruction has the following syntax:
SerialOut(ComPort,OutString,WaitString,NumberTries,TimeOut)
ComPort — the datalogger COM port in which the probe is connected.
OutString — use "1M1!"+CHR(13) for the OutString when the default
probe address of 1 is used.
WaitString — enter the null (“”) WaitString to tell the datalogger to wait
for the echo of each character in the OutString
NumberTries — enter 0
TimeOut — specifies the time, in 0.01 seconds, that the datalogger should
wait for the WaitString or echo of each character in the OutString (0
is used in the example program).
7.2.3.3 SerialIn() Instruction
The SerialIn() instruction has the following syntax:
SerialIn(Dest,ComPort,TimeOut,TerminationChar,MaxNumChars)
Dest — specifies the variable in which the incoming data will be stored.
Please note that in the beginning of the CRBasic program, this
variable needs to be declared as ASCII string format (see example
program in Appendix B, Example Program)
ComPort — the datalogger COM port in which the probe is connected.
TimeOut — 20 should be adequate, which gives a 200 ms maximum delay
time. The TimeOut parameter is used to specify the amount of time,
in 0.01 seconds, that the datalogger should wait before proceeding to
the next instruction.
TerminationChar — enter 0
MaxNumChars — 20 should be adequate (specify the maximum number
of characters to expect per input)
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