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Chapter 8 ____________________________________________________________ Technical Data
VAISALA______________________________________________________________________ 255
Leaf Wetness Sensor
Specifications
Table 83 Leaf Wetness Sensor QLW101 Specifications
Property Description/Value
Sensor type Artificial leaf electrical resistance
Excitation Bipolar (5V nominal) built-in
Time constant 2 seconds
Current output Variable resistance from >1 MΩ (dry)
to <130 kΩ (wet)
Supply voltage 1mA (typical) at +5 VDC ±10%
Sensor area
28 cm
2
Attached cable length 5 m (16.4 ft.)
Cable type 2-twisted pair, 24 AWG shielded
cable with UV-resistant jacket, wires
stripped and tinned
Recommended max. cable length
1
1. Increasing the cable length above the recommended maximum cable
length causes measurement error in the form of lower moisture readings.
24 AWG Cable (3-conductor) 91 m (299 ft.)
22 AWG 2-Twisted Pair Cable 194 m (636 ft.)
18 AWG Cable (3-conductor) 218 m (715 ft.)
Substrate material Glass-reinforced, ceramic-filled
laminate
Grid material 1 oz. copper, nickel, and 50 µin gold
plate
Mounting bracket White powder-coated aluminum
Dimensions h × w × t 51 × 38 × 6 mm (2 × 1.5 × 0.24 in.)
Weight 227 g (0.5 lb.)
- 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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