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Chapter 6 ______________________________________________________________ Maintenance
VAISALA______________________________________________________________________ 177
Pyranometers
Periodoc Maintenance
The pyranometer is an all weather instrument. Once installed the
pyranometer needs little maintenance. It is recommended that you clean
the detector as part of a regular routine, using water or alcohol.
Re-calibration is suggested every two years. This can be done in two
ways. The first is to compare with the measurement of a similar sensor
at the same site. Daily totals of at least two days should be compared.
Calibration factor should be corrected if results differ by more than six
per cent. The second way is to let a re-calibration be performed at the
factory.
If necessary, the sensitivity of the pyranometer can be adjusted. This
can be done by soldering a resistor between the + (white) and - (black)
output wires. In this way the pyranometer is shunted. For the standard
pyranometer, the internal resistance is 47 Ω, and the cable resistance is
0.12 Ω/m. The cable is 3 m long. The cable resistance has to be
multiplied by two, for the + and - wire. Total resistance is 47.7 Ω. In
order to reduce the sensitivity by a factor of 10, when the full 3 meters
of cable is used, a shunt resistor of 5.3 Ω can be made out of a 1 and a
4.3 Ω resistor. The order of magnitude for the sensitivity will be 10 µV/
Wm
-2
.
The general formula for establishing the proper resistor for trimming by
a factor of 10 is [47 + (0.24 × cable length)]/9. The cable length is in
meters and the resistance is in ohms.
Net Solar Radiation Sensor
Periodic Maintenance
The Net Radiation Sensor is an all weather instrument. Once installed it
needs little maintenance. It is recommended that you clean the detector
as part of a regular routine, using water or alcohol.
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 3 4
- CHAPTER 4 4
- CHAPTER 5 5
- CHAPTER 6 6
- CHAPTER 7 7
- CHAPTER 8 8
- APPENDIX A 10
- GENERAL INFORMATION 11
- General Safety Considerations 12
- Feedback 12
- ESD Protection 14
- Recycling 15
- Trademarks 15
- License Agreement 15
- Warranty 15
- PRODUCT OVERVIEW 17
- 0406-045 18
- 0505-241 19
- Product Nomenclature 20
- Table 4 Sensor Options 21
- AWS Logger 22
- Additional Internal Battery 25
- Wall Adapter 25
- MAWS Software 26
- Operating Software 26
- MAWS Terminal 26
- MAWS Lizard Setup Software 26
- Accessories 27
- Sensor Arm 27
- Carry Case Sets 27
- Mains Power Supply 29
- Solar/Mains Power Supply 30
- AC Power Cable 31
- Introduction to DSI485A 33
- Introduction to DSI486 34
- Repeater Function 36
- 9901-012 43
- 0406-051 47
- SELECTING LOCATION 51
- 0212-221 52
- 0212-222 52
- INSTALLATION 59
- 0404-027 61
- 0404-028 61
- 0201-019 62
- 0201-020 63
- 0402-024 63
- 0404-029 64
- 0201-021 64
- 0201-027 65
- 0201-023 65
- Installing MAWS201 Tripod 66
- 0312-002 67
- Installing Power Supply 68
- Installing Solar Panel 68
- 0406-049 69
- 9806-015 70
- 0201-030 70
- 0201-053 70
- Installing a QMP Power Supply 71
- 0201-031 72
- 0201-032 73
- Connecting Cables 74
- Communication Modules 76
- Unpacking Instructions 78
- Assembling WXT510 78
- 0402-097 79
- 0201-035 82
- 0002-010 83
- Installing on a Pedestal 84
- Finalizing the Installation 85
- 0106-039 89
- 0106-038 90
- 0412-032 91
- 0106-042 92
- 0105-087 94
- 0404-026 94
- Installation Procedure 97
- Mounting to a Pole Mast 98
- Mounting to a Sensor Support 98
- OPERATION 99
- Taking MAWS into Use 100
- Setting Up Tripod 100
- 9902-002 101
- 0403-009 101
- 0403-014 102
- 0404-035 102
- 0403-015 103
- 0505-245 104
- 0404-034 104
- 0404-030 105
- 0404-036 105
- 0201-025 106
- 0403-019 106
- Aligning Weather Transmitter 107
- 0003-011 108
- Aligning Wind Vane 109
- 0201-034 110
- Setting Up Solar Panel 111
- Figure 103 Map of Latitudes 112
- Quick Start Instructions 113
- 0201-044 114
- Using MAWS Terminal Software 115
- Selecting the Language 115
- MAWS Terminal Main Window 116
- 0105-040 117
- 0105-041 118
- Preferences Window 119
- 0312-016 120
- Address Book Window 121
- Service connection opened 123
- Giving Commands 124
- Managing User Levels 125
- Modifying Station Settings 127
- Setting Static Parameters 128
- 0406-034 129
- 0405-052 130
- Calibrating Sensors 131
- Sensor Status List 134
- Entering Values Manually 135
- Manual Entry in MAWS Terminal 136
- MAWS Setup File 137
- Selecting Setup File 137
- Uploading Setup File 138
- Data Logging 139
- Log Data Format 140
- Controlling Logging 141
- Measurement Enable or Disable 142
- Freeing Up Logging Space 144
- Working with Data Log Files 144
- 0312-062 145
- Downloading Files 146
- Autodownloading Log Files 147
- 0406-035 148
- 0406-036 148
- 0406-037 149
- 0406-038 150
- 0406-039 150
- Browsing Downloaded Files 151
- 0312-064 152
- 0312-065 152
- 0312-066 153
- 0105-052 154
- Using External Memory Card 155
- Memory Card 156
- Resetting MAWS 157
- Table 20 Command Set 158
- Packing Instructions 161
- 0201-013 162
- 0201-014 162
- MAINTENANCE 163
- Overall Checking 165
- Cable Maintenance 165
- Copying a New MAWS Software 166
- Spare Parts 169
- Available Spare Parts 169
- Ordering Spare Parts 169
- Solar Panel 169
- Periodic Maintenance 169
- Weather Transmitter 170
- Cleaning 170
- Replacing the PTU Module 170
- Combined Wind Sensor 171
- 0009-022 173
- Humidity Calibration 175
- Pressure Sensor 176
- Calibration 176
- Rain Gauges 177
- Periodoc Maintenance 179
- Net Solar Radiation Sensor 179
- Pyranometers 179
- Soil Moisture Sensor 180
- TROUBLESHOOTING 183
- Using blank configuration 185
- !Erroneous setup file 185
- Visual Check 188
- 0401-246 189
- 0304-025 191
- Opening Service Connection 192
- Through MAWS 192
- Connection Problems 193
- Error Messages 193
- Determining Sensor Status 194
- 0312-038 195
- Table 29 Sensor Status List 197
- LASTVAL Command 200
- Warnings and Errors 201
- System Information 203
- Battery Status 204
- Battery Regulator 206
- Soil Temperature Sensor 207
- Technical Support 208
- TECHNICAL DATA 209
- Figure 150 Connector Blocks 211
- Wiring Instructions 212
- 0404-023 213
- 0505-249 214
- 0401-253 215
- 0401-254 215
- 9812-001 216
- 0201-048 216
- 0201-049 217
- 0201-050 218
- 0202-014 219
- 9812-002 219
- UHF Radio Modem 220
- Connector Adapters 221
- 0201-040 223
- Charging of Internal Battery 224
- External Power Supply 225
- Solar Cell 225
- Lead Batteries 226
- Primary Cells 226
- Normal Charging 227
- Quick Charging 228
- Float Charging 228
- Temperature Protection 229
- Specifications 230
- AWS Logger QML201 230
- Internal Battery 231
- Power Supplies 232
- RS-232 Module 235
- RS-485 Modules 236
- Modem Module 237
- Performance 239
- Table 58 Precipitation 240
- Table 59 Relative Humidity 241
- Table 60 Wind 241
- Operating Conditions 242
- Inputs and Outputs 242
- Materials 243
- Dimensions 243
- Emissions 252
- Immunity 252
- Block Diagram 253
- Leaf Wetness Sensor 257
- GLOSSARY 259
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