Campbell Scientific Sentek EnviroSCAN EasyAG SDI-12 Manual v 3.4 - Manual (Page 17)

EnviroSMART & EasyAG SDI-12 Probe Manual
Copyright © 1991 – 2003 Sentek Pty Ltd All rights reserved Page 12
Note: Refer to notes on Start Measurement (aM! or aMn!) command above.
Soil Moisture Configuration Values (aC4!, aC5! and aC6!)
The Start Concurrent Measurement commands (aC! or aCn!) “aC4!”, “aC5!” and “aC6!” allow all soil
moisture A, B and C constants to be sampled with a single command. Values are gathered in the same
way as for the Start Measurement command (aM! or aMn!), but the Send Data command (aDn!) may
return up to eight(8) values.
A Constants are retrieved with the Start Concurrent Measurement command (aC! or aCn!) “aC6!”
Command Response
aC6! A00016
The response indicates that 16 A constant values will be available immediately. The controlling device
will then issue Send Data commands (aDn!) to read the values.
Command Response
aD0! a+000.1957+000.1957+000.1957+000.1957+000.1957
+000.1957+000.1957+000.1957
aD1! a+000.1957+000.1957+000.1957+000.1957+000.1957
+000.1957+000.1957+000.1957
B Constants are retrieved with the Start Concurrent Measurement command (aC! or aCn!) “aC5!”
Command Response
aC5! A00016
The response indicates that 16 B constant values will be available immediately. The controlling device
will then issue Send Data commands (aDn!) to read the values.
Command Response
aD0! a+000.4040+000.4040+000.4040+000.4040+000.4040
+000.4040+000.4040+000.4040
aD1! a+000.4040+000.4040+000.4040+000.4040+000.4040
+000.4040+000.4040+000.4040
C Constants are retrieved with the Start Concurrent Measurement command (aC! or aCn!) “aC4!”
Command Response
aC4! A00016