Xylem 4046 ANALOG TO SDI-12 CONVERTER - Manual (Page 3)

Start Verification: Returns a string that imitates a checksum.
command aV! sensor response a0011
Change Address: Change the address of the sensor unit. Valid addresses are
those in the range ‘O’ to ‘9’, A to Z’.
command
aAb! sensor response b
b is the new sensor address.
Start measurement: The unit reads five sensor devices: two external analog
sensors, a tipping bucket counter, a battery voltage sensor, and an on-board
temperature sensor. These are divided into two measurement groups.
Group 1 contains data from the two analog sensors and the tipping bucket.
Group 2 contains data from the internal temperature sensor and battery
voltage.
To collect data from the group 1 sensors: command: aM!
sensor response: attt3
3 Measurements will be ready in ttt seconds. Upon completion of the measurements
a service request will be issued. a
To collect data from the Group 2 sensors: command: aM1!
sensor response A0012
2 Measurements will be ready in 1 second. Upon completion of the measurements a
service will be issued.
Send Data: The format of the data is determined by the preceding command. If
Group 1 measurement results are being returned then data can contain three
numbers. If Group 2 measurement results are being returned then the data will
contain two numbers. All numbers in a data group are preceded with the sign of the
number, either ‘+’ or ‘-‘.
command
aDO! sensor response axxxx…xx
xxx.xx up to 32 characters
The input ANAin1 corresponds to SDI parameter o (first) and its Slope and Offset
values correspond to “A”. Input ANAin 2 correspond to SDI parameter 1 (second)
and it Slope and offset values correspond to “B”. The EVNT IN corresponds to SDI
parameter 2 (third) and its Slope and Offset correspond to “C’