Campbell RainVUE SDI-12 Series, Product Manual

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provided in the following sections. Downloadable example program is available at
www.campbellsci.
eu
/downloads/rainvue-example-program .
7.4.1 SDI-12 programming
The SDI12Recorder() instruction is used to measure a RainVUE-series. This instruction sends
a request to the sensor to make a measurement and then retrieves the measurement from the
sensor. See SDI-12 measurements (p. 12 for more information.
For most data loggers, the SDI12Recorder() instruction has the following syntax:
SDI12Recorder
(Destination, SDIPort, SDIAddress, “SDICommand”, Multiplier,
Offset, FillNAN, WaitonTimeout)
For the
SDIAddress
, alphabetical characters need to be enclosed in quotes (for example, “A”).
Also enclose the
SDICommand
in quotes as shown. The
Destination
parameter must be an
array. The required number of values in the array depends on the command (see Table 8-1 (p.
13)).
FillNAN
and
WaitonTimeout
are optional parameters (refer to CRBasic Help for more
information).
8. Operation
This section discusses the following:
8.1 SDI-12 measurements 12
8.2 SDI-12 extended commands 14
8.3 SDI-12 version 1.4 identify measurement commands and responses 16
8.4 Rainfall intensity correction 18
8.5 Device Configuration Utility 18
8.1 SDI-12 measurements
The RainVUE-series responds to the SDI-12 measurement commands shown in Table 8-1 (p. 13).
When the data logger issues an M! command, the sensor should respond immediately indicating
how long it will take to perform the measurement. The data logger then waits that amount of
time or if the sensor finishes sooner, it will send a service request to the data logger indicating
RainVUE-Series SDI-12 Precipitation Sensors 12