Bringing the Benefits of Real-Time Data Collection to the World
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aXUP+n+d!
where n is one of the selections from the following table and d
is the number of digits to the right of the decimal point.
N
Type Units
Comments
0
mB (hPa)
1
inches of
mercury
2
kPa
3
mmHg
4
Atm
5
psia
9
user units
the value has units that depend on the
values entered using the XUU command.
For example, the command
aXUP+0+2!
will specify the output to be in the default units (mB) with a resolution of 2 decimal places. The second
parameter (2 in the example) is optional. If omitted, the resolution is not changed.
Setting User Units
If you want the sensor to read out in units other than the factory-programmed units, you will need to use the
XUP command to set the units to 9, user units. When user units are selected, the software will use the
equation:
output = mB * scale + offset
where scale and offset are values you can enter into the system.
The XUU command is used to enter the user scale and offset. The format of the command is:
aXUUso!
where s is the signed scale and o is the signed offset.
For example, the following command will set the scale to 70.32 and the offset to 0.0:
aXUU+70.32+0
Similarly, the slope and offset can be set to any values that will produce the desired units.
NOTE: Remember that both a XUU and a XUP command are required for the ACCUBAR
®
to
report in user-defined units.
Setting Station Elevation
The ACCUBAR
®
will usually be installed at an elevation other than sea level. To have the ACCUBAR
®
report the atmospheric pressure at sea level, the sensor's elevation offset from sea level must be entered.
The ACCUBAR
®
has two commands that can be used to enter this elevation offset. The XE command
allows direct setting of an elevation offset which will be added to the measurement to compute atmospheric
pressure at sea level:
