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Most data recorders will issue this command and automatically handle the reply to collect data. You can
also issue the command yourself. In reply, the ACCUBAR
®
will respond with
attt2
acknowledging it is address a and indicating that after ttt
seconds are allowed for the measurement, 2 values can be
collected.
When the measurement is complete, the ACCUBAR
®
responds with a service request
A
where a is the address character
Note that you still don't have any data from the ACCUBAR
®
. To request the data after a measurement,
aD0!
where a is the address character and D0 is the command to
retrieve measured data. (Note: 0 is zero, not the letter O)
In this case the ACCUBAR
®
will reply with two values in the format:
avu
where a is the address, v is the data value and u indicates the
units. Both v and u have the format of a polarity (+ or -) sign
followed by up to seven digits, including a decimal point. One
example of a response would be
0+1013.25+0
The u indicates the units of the measurement. When u is 0, the value has units of mB(hPa). When u is 1,
the units are inches of mercury ("Hg). When u is 9, the units depend on a user entered slope and offset. u
can also take on additional values if a station elevation offset has been entered The following table
summarizes all the values of u.
0
units are mB (hPa)
1
units are "Hg
2
units are kPa
3
units are mmHg
4
units are Atm
5
units are psia
9
units depend on user-entered scale and offset.
If the station elevation offset is non-zero, then one of the
following values of u will be returned:
10
units are mB + station elevation offset
11
units are "Hg + station elevation offset
12
units are kPa + station elevation offset
13
units are mmHg + station elevation offset
14
units are Atm + station elevation offset
15
units are psia + station elevation offset
19
user units with non-zero station elevation offset
(mB + elevation offset)
user scale + user offset
set by XE or XS
Set by XUU
