Campbell Scientific CS525 ISFET pH Probe - Manual (Page 10)

CS525 ISFET pH Probe
TABLE 3-2. CR200(X) Series Wiring
Wire Color Wire Label/Function VDIV2:1* CR200(X) Series
Red Power 5 Vdc EX
Black Signal Reference G
White Signal H SE
Clear Shield G
*When using the VDIV2:1 with the CR200(X)-series datalogger, the L peg of
the VDIV2:1 is not used and can be removed.
4. Programming
4.1 Using SCWIN for CR800, CR850, CR1000, and CR3000
In SCWIN, the CS525 is programmed by selecting single-ended voltage under
Generic Measurements. SCWIN is the easiest and typically the preferred
method for programming the datalogger. SCWIN generates a wiring diagram
that shows how to connect the CS525 to your Campbell Scientific datalogger.
The sections that immediately follow are for CRBasic users.
SCWIN users can jump ahead to the Calibration section. NOTE
4.2 Using CRBasic
4.2.1 Simple Program
4.2.1.1 CR200(X) Programming
The CS525 does not require constant power. To conserve power, the
datalogger can be programmed to power the CS525 prior to the measurement,
shut off. This function can be accomplished using the ExDelSE instruction of
a CR200(X) datalogger. A multiplier of 1.0 and an offset of 0.0 yields
millivolts. A corrected multiplier and an offset are required to provide an
output in pH units (see Appendix A).
The ExDelSE instruction has the following format:
ExDelSE(Dest,Reps,SEChan,ExChan,ExmV,Delay,Mult,Offset )
This example program uses the ExDelSE instruction to apply a voltage to
excitation channel one, delay for 30 milliseconds, and then make a
measurement on single-ended analog channel one.
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