Campbell Scientific CS451/CS456 Pressure Transducer - Manual (Page 44)

Appendix D. SDI-12 Sensor Support
and valid entries for pp (pressure/level) are:
0 = psig
1 = kPa
2 = bar
3 = feet
4 = meter
5 = inch
6 = millimeter
Only SDI-12 instruction aM!, aM7!, and aM8! output the results obtained
when using the multiplier and offset. The multiplier and offset are only applied
to the pressure/level value, not to the temperature.
The extended SDI-12 command used to configure sample number is
aXCONFIG2=nnn!, where nnn is the number of samples that will be
measured to obtain the final output value, which is an average of the samples
taken. This value only applies to the aM8! command. The integration time is
a result of the number of samples selected. This value can be derived by
adding 2 s to the number of samples. For example, if nnn = 50, then 50
samples would be averaged. The integration time for this process is 50 plus 2,
or 52 s.
D-6