Accubar SDI-12 Barometric Pressure Sensor Operations & Maintenance Manual Rev-B 30 Nov 2017
pg. 27
Command Description
Command Syntax
(command underlined)
ACCUBAR
®
response (underlined)
"a" represents the single-character address
M1
Request Pressure
Measurement in mB
(factory calibrated
value)
aM1!
aD0!
attt1
ttt is the time in seconds until the measurement
is ready, 1 is the number of values that can be
collected.
a
service request
ap
where p is the signed pressure value in mB
M2
Request Temperature
Measurement
aM2!
aD0!
attt2
ttt is the time in seconds until the measurement
is ready and 2 is the number of values that can
be collected
a
service request
atu
where t is the temperature and u is the units 0=
Celsius and 1=Fahrenheit. Use the XUT
command to set the units.
M3
Request User Scale,
User Offset, and Field
Calibration Offset
aM3!
aD0!
a0003
000 is the time in seconds until the
measurement is ready and 3 is the number of
values that can be collected
asoc
where, s is the user scale and o is the user offset,
and c is the field calibration offset. The field
calibration is returned in the current units.
M4
Request Standards lab
Calibration Scale and
Offset
aM4!
aD0!
a0002
000 is the time in seconds until the
measurement is ready and 2 is the number of
values that can be collected
aso
where, s is the scale calibration and o is the
offset calibration(mB).
