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User Manual EE260 Heated Humidity and Temperature Probe for Meteorological Applications
5.3 Modbus Register Map
The measured data is saved as a 32 bit floating point values (data type FLOAT) and as 16 bit signed
integer values (data type INTEGER).
FLOAT 32 bit:
Parameter
Unit
Register number
1)
[Dec]
Register address
2)
[HEX]
Read register: function code 0x03 / 0x04
Temperature T
°C
1003
0x3EA
°F
1005
0x3EC
°K
1009
0x3F0
Relative humidity RH, Uw
% RH
1021
0x3FC
Water vapour partial pressure e
mbar
1101
0x44C
psi
1103
0x44E
Dew point temperature Td
°C
1105
0x450
°F
1107
0x452
°K
1147
0x47A
Wet bulb temperature Tw
°C
1109
0x454
°F
1111
0x456
°K
1145
0x478
Absolute humidity dv
g/m³
1113
0x458
gr/ft³
1115
0x45A
Mixing ratio r
g/kg
1121
0x460
gr/lb
1123
0x462
Specific enthalpy h
kJ/kg
1125
0x464
ft lbf/lb
1127
0x466
BTU/lb
1129
0x468
Frost point temperature Tf
°C
1131
0x46A
°F
1133
0x46C
°K
1149
0x47C
Volume concentration Wv
ppm
1151
0x47E
%
1155
0x482
‰
1157
0x484
Saturation vapor pressure
above water ew
mbar
1221
0x4C4
psi
1223
0x4C6
Saturation vapor pressure
above ice ei
mbar
1225
0x4C8
psi
1227
0x4CA
Ice bulb temperature Ti
°C
1237
0x4D4
°F
1239
0x4D6
°K
1241
0x4D8
Specific humidity qv
g/kg
1247
0x4DE
gr/lb
1249
0x4E0
1) Register number starts from 1
2) Register address starts from 0
