Campbell CR200 Manual do Operador Página 138
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Section 11. Programming Resource Library
where
Figure 47: Standard Deviation of Direction
The Taylor Series for the Cosine function, truncated after 2 terms is:
For deviations less than 40 degrees, the error in this approximation is less than
1%. At deviations of 60 degrees, the error is 10%.
The speed sample can be expressed as the deviation about the mean speed,
Equating the two expressions for Cos (θ') and using the previous equation for s
i
;
Solving for (Θ
i
')
2
, one obtains;
Summing (Θ
i
')
2
over N samples and dividing by N yields the variance of Θu.
Note that the sum of the last term equals 0.
The term,
is 0 if the deviations in speed are not correlated with the deviation in direction.
This assumption has been verified in tests on wind data by CSI; the Air
124
- OPERATOR’S MANUAL 1
- Limited Warranty 3
- Assistance 4
- Precautions 5
- Table of Contents 7
- List of Figures 12
- ....................... 86 13
- Section 1. Introduction 15
- 2.1.1.2 Sensors 17
- 2.1.2 CR200(X) Mounting 18
- 2.1.3 Wiring Panel 18
- 2.1.4 Battery Backup 19
- 2.1.5 Power Supply 19
- 2.1.6 Antenna 19
- 2.1.7 Analog Sensors 20
- 2.1.8 Bridge Sensors 20
- 2.1.9 Pulse Sensors 21
- 2.1.10 Digital I/O Ports 22
- 2.1.11 RS-232 Sensors 23
- 2.2.1 Hardware Setup 25
- 2.2.2 Configuration 25
- 2.2.3 PC200W Software Setup 25
- Section 3. Overview 37
- 3.1.2 Sensor Support 39
- 3.1.3.2 Voltage Outputs 41
- 3.1.3.3 Grounding Terminals 41
- 3.1.3.4 Power Terminals 42
- Power In 42
- Power Out 42
- 3.1.4 Power Requirements 43
- 3.1.5.2 User Programming 44
- 3.1.7.1 PakBus 45
- 3.1.8 Maintenance Overview 46
- 3.1.8.3 Calibration 47
- 3.2 PC Support Software 48
- 3.3 Specifications 49
- Section 4. Sensor Support 51
- ±1% of the 52
- Error 53
- 4.2.3 Voltage Range 54
- 4.2.4 Integration 54
- 4.2.5 Self-Calibration 55
- 4.4 Pulse Count Measurement 56
- 4.4.1 Pulse input Channels 57
- 4.4.1.1 Pulse Input (P_SW) 58
- 4.4.1.2 Low-Level AC (P_LL) 59
- 4.6 SDI-12 Recording 60
- 4.7.3 Serial Sensors 61
- Peripherals 63
- 5.2 Other Peripherals 65
- 6.1 Power Requirement 67
- 6.3 Power Supplies 67
- Section 7. Grounding 69
- 7.1.1 Lightning Protection 70
- 8.1 DevConfig 73
- 8.3 Settings 76
- 8.3.1.1 Deployment Tab 78
- 8.3.1.2 Logger Control Tab 79
- 8.3.2 Settings via CRBASIC 80
- 8.3.4 Durable Settings 81
- Section 9. Programming 83
- 9.3.2 CRBASIC Editor 84
- 9.4 Numerical Formats 85
- 9.5 Structure 86
- 9.6.1 Variables 87
- 9.6.1.1 Arrays 88
- 9.6.1.2 Dimensions 89
- 9.6.1.3 Data Types 89
- 9.6.1.4 Flags 89
- 9.6.2 Constants 90
- 9.7.1 Data Tables 91
- 9.7.2 Subroutines 97
- 9.9 Instructions 98
- 9.9.2 Parameter Types 99
- 9.9.3 Names in Parameters 99
- 9.10 Expressions 101
- 9.10.3 Logical Expressions 102
- Abbreviation Process Name 104
- Instructions 107
- 10.2.1 Data Table Modifiers 108
- 10.2.2.2 Multiple-Source 109
- 10.4.1 Common Controls 110
- 10.5.2 Voltage 112
- 10.5.3 Pulse 112
- 10.5.1 Diagnostics 112
- 10.5.4 Digital I/O 113
- 10.5.5 SDI-12 113
- 10.6.2 Logical Operators 114
- 10.6.3.1 Derived Functions 115
- 10.6.4 Arithmetic Functions 116
- 10.6.5 Spatial Processing 117
- 10.7 Clock Functions 118
- 10.8 Serial Input / Output 119
- 10.11 SCADA 121
- 10.12.1 GOES 122
- Library 123
- Examples 125
- 11.4 SDI-12 Sensor Support 126
- Name Command 127
- Response 127
- 11.4.1.1 Addressing 128
- 11.5 Wind Vector 134
- 11.5.2.1 Measured Raw Data 135
- 11.5.2.2 Calculations 135
- Output and Output Processing 139
- 12.1 Data Storage 143
- 12.2 Memory Conservation 144
- 12.3 Memory Reset 144
- Data Retrieval 145
- 13.2 Protocols 146
- 13.4 Data Retrieval 146
- Section 14. PakBus Overview 147
- 14.4.4 Neighbor Lists 149
- 14.4.5 Adjusting Links 149
- 14.5 Troubleshooting 150
- 14.5.2 Ping 151
- 14.5.3 Traffic Flow 152
- Resource Library 153
- 15.1.2.1 Glossary of Terms 154
- 15.1.3.1 Declarations 154
- 15.1.4 Troubleshooting 156
- 16.1 Short Cut 157
- 16.2 PC200W 157
- 16.3 Visual Weather 157
- 16.4 PC400 158
- 16.5 RTDAQ 158
- 16.6 LoggerNet Suite 158
- 16.7 PDA Software 159
- 16.8 Network Planner 159
- 17.1 Temperature Range 161
- 17.2 Moisture Protection 161
- 17.3 Enclosures 161
- Manufacturer Renata 163
- Model CR2016 (3.6V) 163
- Capacity 80 mAh 163
- Section 18. Troubleshooting 165
- 18.1.1.5 TrapCode 166
- 18.1.2 NAN and ±INF 167
- 18.2 Communications 168
- 18.3 Power Supply 169
- Appendix A. Glossary 175
- A.2 Concepts 187
- Calibration table of single 190
- Table 27. CR200(X) Settings 192
- Device PB Address 192
- C.1.1 Pin-Out 195
- Compliance 201
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