Vaisala HPP272, User Manual, Page: 49 / 66

A.4.1 Measurement Data Registers
Table 13 Modbus Measurement Data Registers (Read-Only)
Address
(Decimal) Address
(Hexadecimal) Register Description Data
Format Unit
1 0000
hex
Vaporized hydrogen peroxide
concentration by volume 32-bit float ppm
3 0002
hex
H
2
O+H
2
O
2
relative saturation 32-bit float %RS
5 0004
hex
Temperature used for calculation. By
default, shows the temperature from
the temperature probe (register
0016
hex
).
If temperature compensation is turned
ON (register 0505
hex
), this register
shows the volatile value for given
temperature reading (register 0302
hex
).
See Table 14 (page 49) .
32-bit float °C
7 0006
hex
Relative humidity 32-bit float %RH
9 0008
hex
Absolute hydrogen peroxide 32-bit float mg/m
3
15 000E
hex
Water concentration by volume 32-bit float ppm
17 0010
hex
Water vapor pressure 32-bit float hPa
19 0012
hex
Absolute humidity (water) 32-bit float g/m
3
21 0014
hex
Water vapor saturation pressure 32-bit float hPa
23 0016
hex
Temperature from the temperature
probe 32-bit float °C
257 0100
hex
Vaporized hydrogen peroxide
concentration by volume 16-bit
signed
integer ppm
258 0101
hex
H
2
O+H
2
O
2
relative saturation 16-bit
signed
integer %RS * 100
259 0102
hex
Temperature used for calculation. By
default, shows the temperature from
the temperature probe (register
010B
hex
).
If temperature compensation is turned
ON (register 0505
hex
), this register
shows the volatile value for given
temperature reading (register 0302
hex
).
See Table 14 (page 49) .
16-bit
signed
integer °C * 100
Appendix A – Modbus Reference
47