SOMMER SPA-2, Manual

Page: 59 / 111

11 Serial communication
11.1 What are the options?
Serial data communication with the SPA-2 can be performed by
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RS-485
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Modbus
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SDI-12
11.2 Which data do I get?
The SPA-2 includes a RS-485 and a SDI-12 interface for communication and data output. The meas-
urement values returned by one of these ports are arranged in a fixed sequence and are identified
by the index in
Measurement table . By default the following variables are recorded by the SPA-2:
Index Variable Unit Description
01 snow depth mm Snow depth measured by SPA-2
02 ice content S1 % Ice content of SPA-sensor 1
03 water content S1 % Water content of SPA-sensor 1
04 density S1 kg/m^3 Density of SPA-sensor 1
05 SWE S1 mm Snow water equivalent of SPA-sensor 1
06 ice content S2 % Ice content of SPA-sensor 2
07 water content S2 % Water content of SPA-sensor 2
08 density S2 kg/m^3 Density of SPA-sensor 2
09 SWE S2 mm Snow water equivalent of SPA-sensor 2
10 ice content S3 % Ice content of SPA-sensor 3
11 water content S3 % Water content of SPA-sensor 3
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Manual 59