8
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6
Pyrgeometer physical properties
6.1
Spectral range
6.2 Sensitivity
6.3
Response time
6.4 Non-linearity
6.5
Temperature dependence
6.6
Tilt error
6.7
Window heating o
ff
set
6.8
Zero o
ff
set B due to ambient temperature changes
6.9
Operating temperature
6.10
Field of view
6.11
Directional response
6.12
Maximum irradiance
6.13 Non-stability
6.14
Spectral selectivity
6.15 Environmental
6.16 Uncertainty
7
Maintenance and recalibration
7.1
Daily maintenance
7.2
Monthly maintenance
7.3
Yearly maintenance
7.4 Calibration
7.4.1
Calibration principle
7.4.2
Traceability to World Radiometric Reference
7.4.3 Recalibration
8
SGR models
8.1 SGR4
8.2 Specifications
9
Frequently asked questions
10
Trouble shooting
11
Keyword index
Appendices
A.
Modbus®
A.1
Modbus® commands
A.2
Input registers
A.3
Most important registers
A.4
Holding registers
A.5
Read input register
A.6
Discrete inputs
A.7
Coils
A.8
Read write holding registers
A.9
Read discrete inputs
A.10
Read write discrete coils
A.11
Requesting serial number
A.12
Simple demonstration program
B.
List of World and Regional Radiation Centres
C.
Recalibration service
29
29
29
30
30
30
30
31
31
31
31
31
31
31
31
31
31
33
33
33
33
33
33
34
34
35
35
35
37
39
41
43
43
43
43
45
46
46
49
50
50
50
52
53
54
55
56
