Campbell RWIS STATIONS Instruction Manual - page 19
RWIS Stations
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converted to text with the P190 instruction, and text is created also with the
P190. This is the set settings instruction, and when using this technique the 68
instruction is used to spell out the text. In both cases the form is
variablename=value. There is a limit though to the amount of text that can be
created. Twenty-nine characters maximum are allowed on either side of the
equal sign for CR10X-2M datalogger.
ESS-1204 defines all the measurements to be made. All measurements aren't
required, but values have to be provided for all measurements. If a sensor isn’t
part of a station, the specification requires that a no sensor value be present.
The way that this is done is by writing an initialization subroutine to provide
values for all sensors and creating values that correspond to the type of
measurement. The subroutine is executed one time at startup or when the
program is recompiled. In this way default values are already established. As
sensors are added in the measurement section of the of the program, the
measured values replace the default values in the output.