In-Situ Aqua TROLL 400 Modbus and SDI-12 Reference Guide - Manual (Page 22)

Name Command Response
Set pH Slope
Send Data
aXHSpd.d!
aD0! a0011<CR><LF>
One result is available in 1 second for reading by
the Send Data command. A service request
(a<CR><LF>) will be sent when the result is ready.
pd.d = pH slope (pH/mV at 25 °C, must be less
than zero)
p = polarity sign (+ or -)
d = digits (1 to 7)
. = decimal point (optional)
a+s<CR><LF>
s = command status, 1 = command successful, 0 =
command failed (sensor not plugged in).
Read pH Slope
Send Data
aXHS!
aD0! a0011<CR><LF>
One result is available in 1 second for reading by
the Send Data command.
a+pd.d<CR><LF>
pd.d = pH slope (pH/mV at 25°C, returns -9999 if
sensor is not plugged in)
Set pH Offset
Send Data
aXHOpd.d!
aD0! a0011<CR><LF>
One result is available in 1 second for reading by
the Send Data command. A service request
(a<CR><LF>) will be sent when the result is ready.
pd.d = pH offset (must be greater than zero)
p = polarity sign (+ or -)
d = digits (1 to 7)
. = decimal point (optional)
a+s<CR><LF>
s = command status, 1 = command successful, 0 =
command failed (sensor not plugged in)
Read pH Offset
Send Data
aXHO!
aD0! a0011<CR><LF>
One result is available in 1 second for reading by
the Send Data command.
a+pd.d<CR><LF>
pd.d = pH offset (pH, returns -9999 if sensor is not
plugged in)
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