700-SDI-PT-KEL-Man Rev 4 06 Jan 2020
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Table 3-1 EXTENDED SDI-12 COMMANDS
This table lists the extended SDI-12 commands used by the SDI-PT-KEL (Keller Acculevel). Detailed information and
instructions follow the table for the most commonly used commands which are identified in bold. Detailed information on
non-bolded X-commands can be found in the Keller document, “
SDI-12 communication Protocol
.
Description
Command
Response
Read / write offset value
for pressure
aXZZ! / aXZZ<value>!
a<value><CR><LF>
Read / write gain factor for
pressure
aXZF! / aXZF<value>!
a<value><CR><LF>
Read / write pressure unit
aXP! / aXP0x!
A0x<CR><LF>
Read / write gravitational
acceleration [m/s2] (default:
+9.80665m/s2)
aXG! / aXG<value>!
a<value><CR><LF>
Read / write temperature
unit
aXT! / aXT0x!
a0x<CR><LF>
Read / write offset value
for temperature T
aXZZT! / aXZZT<value>!
a<value><CR><LF>
Read / write offset value for
temperature TOB
aXZZTOB! / aXZZTOB<value>! a<value><CR><LF>
Read / write UserID
aXI! / aXI<cccccccccccccccc>!
a<cccccccccccccccc><CR><LF>
State continuous
measurement
aXR!
aXRS<tt>B<ss>RUN<CR><LF>
aXRM<tt>B<ss>STOP<CR><LF>
Configuration continuous
measurement
aXRS<tt>B<ss>!
aXRM<tt>B<ss>!
aXRS<tt>B<ss>STOP<CR><LF>
aXRM<tt>B<ss>STOP<CR><LF>
Start continuous
measurement
aXRON!
aXRS<tt>B<ss>RUN<CR><LF>
aXRM<tt>B<ss>STOP<CR><LF>
Stop continuous
measurement
aXROFF!
aXRS<tt>B<ss>STOP<CR><LF>
aXRM<tt>B<ss>STOP<CR><LF>
3.6.1
Pressure
The pressure value is scaled in the following way: value = value * gain + offset
7
https://www.kelleramerica.com/manuals-and-software/manuals/communication_protocol_SDI-12.pdf
