Delta-T Devices PR2 User Manual page 21

soil moisture
m
DL2e slope and offset conversion
For DL2e data loggers, you can create sensor codes using slope
and offset, if you cannot use the linearisation table codes above.
These will be accurate only for the restricted range up to 30%vol.
The sensor code 'Conversion Factor' is the reciprocal of the
'Slope' figures above. Base units are mV and Engineering units
are %vol.
From probe mV to:
%volume, Mineral soil
%volume, Organic soil
Profile Probe User Manual 3.0a
3 -3
.m %vol
0 0
0.05 5
0.10 10
0.15 15
0.20 20
0.25 25
0.30 30
0.35 35
0.40 40
0.45 45
0.50 50
0.55 55
0.60 60
0.65 65
0.70 70
0.75 75
0.80 80
0.85 85
0.90 90
0.95 95
1.00 100
mineral organic
soil soil
Volt Volt
0.257 0.177
0.379 0.280
0.497 0.394
0.595 0.501
0.677 0.590
0.749 0.667
0.810 0.734
0.860 0.793
0.899 0.843
0.930 0.882
0.956 0.914
0.977 0.940
0.995 0.962
1.011 0.981
1.026 0.997
1.038 1.012
1.050 1.025
1.060 1.037
1.070 1.048
1.079 1.057
1.088 1.067
Conversion
Factor
mV/%vol
18.96
17.38
Offset
%vol
-14.6
-12.1
Operation 21