MSB780(X) - User’s Guide
are timeouts. After the barometer sends "Waiting for XMODEM receive." you have to start the
transmission within next 15 seconds, otherwise the timeout cancels the transfer.
6.35 Adjustment commands
In the following chapters commands for adjusting the barometer are described.
6.36 “cset” Set adjust coefficients
This command enables to adjust the MSB780 barometer by entering two linear coefficients -
offset and gain. If the barometer contains more transducers, two coefficients for each transducer
can be set.
Example:
cset<cr>
Select sensor [ 1 2 3 ] : 1<cr><cr><lf>
CSET for sensor 1 : [ k q ] “0.1234”<cr><lf>
Set new ’k’ coefficient: 1.000156<cr>
k = 1.000156<cr><lf>
Set new ’q’ coefficient: 0.25<cr>
q = 0.25<cr><lf>
wait..OK<cr><lf>
The output pressure is computed using formula 8.
p
out
= k.p
meas
+ q (8)
where:
p
meas
is pressure measured by pressure sensor in hPa
k is the corrected pressure gain
q is the corrected pressure offset
p
out
is pressure on the output of the MSB780 in hPa
For MSB780X with more than 1 transducer, there is set of k and q coefficients for each trans-
ducer. When using cset command, user is prompted first, which transducer’s coefficients are
being updated, example for two transducer version:
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