Accubar SDI-12 Barometric Pressure Sensor Operations & Maintenance Manual Rev-B 30 Nov 2017
pg. 26
Command Description
Command Syntax
(command underlined)
Sensor response (underlined)
"a" represents the single-character address
D0
Request Data
aD0!
NOTE:
This command is only issued
after a measurement command. It
should not be issued until the
measurement time has expired or a
service request has been received.
av
v contains the previously-requested
measurement values. For example,
0+1013.25+0
If the above value was received and the previous
measurement command was an M, that would
indicate that the pressure is 1013.25 mB.
Note:
If the ACCUBAR
®
only returns the address,
and no data values, that indicates that there is
no data available. A measurement command has
not been issued OR the command was aborted
by sending a new command before the
measurement time expired OR a service request
has been received.
I
Send Identification
aI!
a13 SUTRON BARO-12.1sssssssBvvv
13
supports SDI version 1.3 commands
SUTRON
manufacturer
BARO-1
Accubar model number
2.1
hardware revision level
sssssss
the sensor serial number
Bvvv
the software revision
M
Request Default
Pressure
Measurement
aM!
aD0!
attt2
ttt is the time in seconds until the measurement
is ready, 2 is the number of values that can be
collected
a
service request
axu
where x is the signed pressure value and u is the
signed indicator of the units. The units are set by
the XUP command.
