Accubar SDI-12 Barometric Pressure Sensor Operations & Maintenance Manual Rev-B 30 Nov 2017
pg. 33
Command
Description
Command Syntax
(command underlined)
ACCUBAR
®
response (underlined)
"a" represents the single-character address
XUP
Set pressure units
(Version 1.5 and
higher for setting
number of decimal
places)
aXUP+n+d!
n = 0
mB (hPa)
n = 1
"Hg
n = 2
kPa
n = 3
mmHg
n = 4
Atm
n = 5
psia
n = 9
user units
d = number of places right of the decimal
(optional parameter)
Example: 0XUP+9+2!
Select user units with 2 right digits-- (make
sure you use XUU command to set the scale
and offset for the desired user units)
a0012
indicating the command will be complete in 1
second and 2 values can be collected
Note:
a D0 command issued after the XUP will
return the value of the units that are selected
and the number of digits right of the decimal
point.
Note:
Current settings can be queried by
issuing the aXUP! Command followed by the
aD0! Command.
XUT
Set temperature
units
aXUTn!
n = 0 for Celsius,
n = 1 for Fahrenheit
Example: 0XUT1!
(set temperature units to F)
Note:
Current settings can be queried by
issuing the aXUT! Command followed by the
aD0! Command.
a0011
indicating the command will take 1 second to
complete and 1 value can be collected.
Note:
a D0 command issued after the XUT will
return the value of the units that are selected.
XUU
Set User Units
aXUUso!
where s is the pressure scale factor and o is
the offset,
User output = (mB)*scale + offset
Example: 0XUU+27.63+0
(27.63 user units per mB)
Note:
Current settings can be queried by
issuing the aXUU! Command followed by the
aD0! Command.
a0012
Note:
a D0 command issued after XUU will
return the scale and offset.
Note
: a scale of 0 is invalid.
Note:
Be sure that the units of pressure (XUP)
are set to user units (9).
