0871LH1 Freezing Rain Sensor - Campbell Sci · 1.2 Watchdog/Reset Circuit ... 0871LH1 Freezing Rain...
Transcript of 0871LH1 Freezing Rain Sensor - Campbell Sci · 1.2 Watchdog/Reset Circuit ... 0871LH1 Freezing Rain...
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Copyright © 20Campbell Scientific (Canada)Corp.
0871LH1Freezing Rain Sensor
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1 ............................................................................................................................................... 2 2 ................................................................................................................................................ 2 3 ............................................................................................................. 2 4 ....................................................................................................................................... 4 5 .............................................................................................................................. 6 6 ................................................................................................................. 7 7 .............................................................................................................................. 7 8 ..................................................................................................................... 7 9 .................................................................................................................................................. 8
9.1 0871LH1CBL-L Wiring for Discrete Output ................................................................................ 8 9.2 0871LH1CBL-L Wiring for RS422 Output .................................................................................. 9
10 .............................................................................................................................. 10 10.1 CR1000 Example – Discrete Outputs ...................................................................................... 10 10.2 CR23X Example – Discrete Outputs ........................................................................................ 11 10.3 CR1000 Example – RS422 Outputs ........................................................................................ 13
1 ....................................................... 20 2 ................................................................................................................................. 20 3 ................................................................................................................. 20 4 .............................................................................................................. 20 5 ..................................................................................................... 21 6 ...................................................................................................................... 22 7 ................................................................................................................... 22 8 .......................................................................................................................... 23 9 ....................................................................................................... 24 10 ......................................................................................... 25
1 .................................................................................................... 26 1.1 Microcontroller .......................................................................................................................... 27 1.2 Watchdog/Reset Circuit ............................................................................................................ 27 1.3 Serial EEPROM ........................................................................................................................ 27 1.4 Probe Oscillator ........................................................................................................................ 27 1.5 Heater Control .......................................................................................................................... 27 1.6 Drive Coil .................................................................................................................................. 28 1.7 Feedback Coil .......................................................................................................................... 28 1.8 Heater ....................................................................................................................................... 28 1.9 DC Power Supply ..................................................................................................................... 28 1.10 Status Output ........................................................................................................................... 28 1.11 Ice Signal Output ...................................................................................................................... 28
2 .................................................................................................................... 29 3 ................................................................................................................. 30
3.1 Input/Output Pin Designations.................................................................................................. 30
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Strut HeatersProbe HeaterTermination
Drive Coil
Feedback Coil
Ultrasonic Vibrating Probe40KHz Nominal
Magnet
Strut HeatersProbe HeaterTermination
Drive Coil
Feedback Coil
Ultrasonic Vibrating Probe40KHz Nominal
Magnet
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