Register table – Vaisala HMM105 User Manual
Page 22
Technical Reference _________________________________________________________________
20 ________________________________________________________________ M211638EN-A
Register Table
Table 32
HMM105 Register Table
Meaning
Name
ID
Size
(bytes)
Type Read/
Write
Persistent Other
Factory information
Device Address
ADDR
0
1
Byte
R
Yes
Normally 0x2F.
Only 3 LSBs are
changeable. Address
range is therefore
1 ... 7.
Device serial number
SNUM
1
12
Str
R
Yes
Example: A1234567
Sensor number
SSNUM
2
12
Str
R
Yes
Example: B1234567
Component board
number
CBNUM
3
12
Str
R
Yes
Example: C1234567
Software version number VERS
4
12
Str
R
Yes
Example: 1.2.3.4567
Factory calibration date
DDMMYYYY
CDATE
6
4
Uint
R
Yes
Example: 19052014
Factory calibration info
CTEXT
7
19
Str
R
Yes
Example: "CAL INFO"
General parameters and variables
Device status word
STATUS
8
4
Str
R
No
See section Status
Unit representation
selection
UNITS
10
2
Byte
R/W
Yes
0 = Metric units
1 = Nonmetric units
RH result
RH
79
4
Float R
No
%RH
Temperature result
T
65
4
Float R
No
degrees of
celsius/fahrenheit
(see UNITS)
Dew/Frost point Tdf
TDF
88
4
Float R
No
degrees of
celsius/fahrenheit
(see UNITS)
Ambient pressure in hPa
P_AMB
64
4
Float R/W
Yes
Ambient pressure in
hPa. Used for RH
result.
RH Gain
RH_G
96
4
Float R/W
Yes
RH gain
RH Offset
RH_O
97
4
Float R/W
Yes
RH offset
Temperature Gain
T_G
94
4
Float R/W
Yes
Temperature gain
adjustment
Temperature Offset
T_O
95
4
Float R/W
Yes
Temperature offset
adjustment
Temperature reference
point 1
T_RP1
90
4
Float R/W
Yes
Temperature
adjustment reference
point 1. Write ref 1
here when using the
calibration command.
Temperature reference
point 2
T_RP2
91
4
Float R/W
Yes
Temperature
adjustment reference
point 2. Write ref 2
here when using the
calibration command.
RH reference point 1
RH_RP1
92
4
Float R/W
Yes
RH adjustment
reference point 1.
Write ref 1 here when
using the calibration
command.
RH reference point 2
RH_RP2
93
4
Float R/W
Yes
RH adjustment
reference point 2.
Write ref 2 here when
using the calibration
command.