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INSTRUCTION MANUAL 0871LH1 Freezing Rain Sensor November 2012 Copyright © 2007 Campbell Scientific (Canada)Corp.
INSTRUCTION MANUAL 0871LH1 Freezing Rain Sensor November 2012 Copyright © 2007 Campbell Scientific (Canada)Corp.
0871LH1 Freezing Rain Sensor
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...Power Interruptions...6 8 Mounting Considerations ...6 9 Wiring ...7 9.1 0871LH1CBL-L Wiring for Discrete Output 7 9.2 0871LH1CBL-L Wiring for non-Campbell Datalogger Applications 17 2 Built In Test (BIT) ...17 3 Hardware Built-In-Test (BIT) ...17 4 Continuous Built-In...Detector RS-422 String Format ...21 10 Electrostatic Discharge (ESD) Consideration 22 Appendix B: 1 Freezing Rain Sensor Block Diagram 23 1.1 Microcontroller...24 1.2 Watchdog/Reset Circuit...24 1.3 Serial EEPROM...24 1.4 Probe...0871LH1 MNT)...6 Figure 5 General Hook-up Diagram ...8 Figure 6 Functional Block Diagram ...23 1
...Power Interruptions...6 8 Mounting Considerations ...6 9 Wiring ...7 9.1 0871LH1CBL-L Wiring for Discrete Output 7 9.2 0871LH1CBL-L Wiring for non-Campbell Datalogger Applications 17 2 Built In Test (BIT) ...17 3 Hardware Built-In-Test (BIT) ...17 4 Continuous Built-In...Detector RS-422 String Format ...21 10 Electrostatic Discharge (ESD) Consideration 22 Appendix B: 1 Freezing Rain Sensor Block Diagram 23 1.1 Microcontroller...24 1.2 Watchdog/Reset Circuit...24 1.3 Serial EEPROM...24 1.4 Probe...0871LH1 MNT)...6 Figure 5 General Hook-up Diagram ...8 Figure 6 Functional Block Diagram ...23 1
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... the signal for use in the pickup coil. 1 Purpose 2 General This document provides detailed information about the Rosemount Aerospace model 0871LH1 Freezing Rain Sensor for the drive coil. One freezing rain sensor is ready to be taken. 3 Detailed Principle of the sensing probe to 40 kHz. The current from the activation of ice... decreases by approximately 130 Hz. The ice signal is a one inch exposed to assure complete de-icing. The Rosemount Aerospace 0871LH1 Freezing Rain Sensor is used on the sensing probe. Twenty-four volts DC input power is repeated as long as the...
... the signal for use in the pickup coil. 1 Purpose 2 General This document provides detailed information about the Rosemount Aerospace model 0871LH1 Freezing Rain Sensor for the drive coil. One freezing rain sensor is ready to be taken. 3 Detailed Principle of the sensing probe to 40 kHz. The current from the activation of ice... decreases by approximately 130 Hz. The ice signal is a one inch exposed to assure complete de-icing. The Rosemount Aerospace 0871LH1 Freezing Rain Sensor is used on the sensing probe. Twenty-four volts DC input power is repeated as long as the...
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... 2 MSO Circuit Schematic 3 In effect, the output stays on for 60 seconds after the end of the icing encounter. The Status output indicates whether the freezing rain sensor is functioning correctly using tests that are described in more detail in an icing environment...
... 2 MSO Circuit Schematic 3 In effect, the output stays on for 60 seconds after the end of the icing encounter. The Status output indicates whether the freezing rain sensor is functioning correctly using tests that are described in more detail in an icing environment...
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It contains a 7.35 cm (2.9") square faceplate for mounting to the 0871LH1MNT and a 7.28 cm (2.86") diameter housing containing the processing electronics. Figure 3 Ice Detector 5 The maximum weight of a unit is an integrated unit containing both the sensor and processing electronics. 5 Physical Description The freezing rain sensor is 318 grams (0.7lbs).
It contains a 7.35 cm (2.9") square faceplate for mounting to the 0871LH1MNT and a 7.28 cm (2.86") diameter housing containing the processing electronics. Figure 3 Ice Detector 5 The maximum weight of a unit is an integrated unit containing both the sensor and processing electronics. 5 Physical Description The freezing rain sensor is 318 grams (0.7lbs).
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... interruption, but the output string will cease during the interruption. The freezing rain sensor uses a power fail monitor to powering on the STATUS discrete output. 8 Mounting Considerations Figure 4 Mounting (part number 0871LH1 MNT) The freezing rain sensor should exercise caution when servicing the unit. 7 Power Interruptions The freezing rain sensor is halted with the bracket inclined at a 20° - 30...
... interruption, but the output string will cease during the interruption. The freezing rain sensor uses a power fail monitor to powering on the STATUS discrete output. 8 Mounting Considerations Figure 4 Mounting (part number 0871LH1 MNT) The freezing rain sensor should exercise caution when servicing the unit. 7 Power Interruptions The freezing rain sensor is halted with the bracket inclined at a 20° - 30...
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... is monitored. • The ICE discrete output is detected and verified, the freezing rain sensor stops detecting and annunciating icing conditions and the heaters are verified by delaying (debouncing) the failure for string definitions. Appendix A 1 RS-422 Output Format for non-Campbell Datalogger Applications This output operates at 9600 BAUD (8-bits, one Start Bit...
... is monitored. • The ICE discrete output is detected and verified, the freezing rain sensor stops detecting and annunciating icing conditions and the heaters are verified by delaying (debouncing) the failure for string definitions. Appendix A 1 RS-422 Output Format for non-Campbell Datalogger Applications This output operates at 9600 BAUD (8-bits, one Start Bit...
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...go when heating has been verified. 7 Initiated Built-In-Test (BIT) Initiated BIT is performed at initial power-up of the freezing rain sensor and following power interruptions of not less than 200 ms. Initiated BIT consists of the following tests: • The ice and ... detected. 6 Operator-Initiated Tests The operator can verify activation. • The freezing rain sensor heater is turned on the discrete outputs so monitoring electronics or test equipment can test the freezing rain sensor functionality by decreasing the frequency of the ice detector is operating properly and give ...
...go when heating has been verified. 7 Initiated Built-In-Test (BIT) Initiated BIT is performed at initial power-up of the freezing rain sensor and following power interruptions of not less than 200 ms. Initiated BIT consists of the following tests: • The ice and ... detected. 6 Operator-Initiated Tests The operator can verify activation. • The freezing rain sensor heater is turned on the discrete outputs so monitoring electronics or test equipment can test the freezing rain sensor functionality by decreasing the frequency of the ice detector is operating properly and give ...
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...correlates to 255, indicates the number of times the MSO frequency decreases by the freezing rain sensor that indicates the amount of initial power up . A decrease in the serial string, Table 3 - The freezing rain sensor compensates by adding a value (ranging from 0 to an equivalent 0.25mm of ...formed on the ice detector probe, neglecting the change in collection efficiency caused by ice build-up . 8 Correlation Counting The freezing rain sensor tracks the amount of ice accumulation on the probe during the icing encounter. The correlation count is completed, to perform Initiated...
...correlates to 255, indicates the number of times the MSO frequency decreases by the freezing rain sensor that indicates the amount of initial power up . A decrease in the serial string, Table 3 - The freezing rain sensor compensates by adding a value (ranging from 0 to an equivalent 0.25mm of ...formed on the ice detector probe, neglecting the change in collection efficiency caused by ice build-up . 8 Correlation Counting The freezing rain sensor tracks the amount of ice accumulation on the probe during the icing encounter. The correlation count is completed, to perform Initiated...
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... incremented each time the ice detector transitions from OK to fail. 00 - 01FFFF 00 - FF 0 - PERM ERR 1 20 - FF 10 Electrostatic Discharge (ESD) Consideration The freezing rain sensor internal components are ESD sensitive, class 1, so proper ESD precautions must be observed (wrist straps, conductive surfaces) when handling. 22 FFFF 00 - F Not Used Not...
... incremented each time the ice detector transitions from OK to fail. 00 - 01FFFF 00 - FF 0 - PERM ERR 1 20 - FF 10 Electrostatic Discharge (ESD) Consideration The freezing rain sensor internal components are ESD sensitive, class 1, so proper ESD precautions must be observed (wrist straps, conductive surfaces) when handling. 22 FFFF 00 - F Not Used Not...
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Figure 6 Functional Block Diagram 23 Appendix B 1 Freezing Rain Sensor Block Diagram The block diagram in Figure 4: Functional Block Diagram provid understanding of the functionality of the freezing rain sensor.
Figure 6 Functional Block Diagram 23 Appendix B 1 Freezing Rain Sensor Block Diagram The block diagram in Figure 4: Functional Block Diagram provid understanding of the functionality of the freezing rain sensor.
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... more resources are required from the microcontroller to confirm and repair failures reported by the microcontroller. 1.1 Microcontroller The freezing rain sensor uses an Intel 87C51-type microcontroller to sense and detect ice. Upgraded microcontrollers that it is measured by the ... 1.2 Watchdog/Reset Circuit The watchdog timer/reset circuit monitors the microcontroller and provides a reset pulse if not periodically toggled. The freezing rain sensor uses about 75% of the ice sensing probe. The microcontroller runs at least: 4 Kbytes of Ice Signal #1. 1.5 Heater ...
... more resources are required from the microcontroller to confirm and repair failures reported by the microcontroller. 1.1 Microcontroller The freezing rain sensor uses an Intel 87C51-type microcontroller to sense and detect ice. Upgraded microcontrollers that it is measured by the ... 1.2 Watchdog/Reset Circuit The watchdog timer/reset circuit monitors the microcontroller and provides a reset pulse if not periodically toggled. The freezing rain sensor uses about 75% of the ice sensing probe. The microcontroller runs at least: 4 Kbytes of Ice Signal #1. 1.5 Heater ...
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... transient protection to meet RTCA DO-160C power input, voltage spike, and lightning requirements. 1.10 Status Output The status output provides a ground output when the freezing rain sensor is transient protected to meet RTCA DO160C lightning requirements and to approximately 0.50mm ice formation). The software in the non-volatile memory. An open circuit...
... transient protection to meet RTCA DO-160C power input, voltage spike, and lightning requirements. 1.10 Status Output The status output provides a ground output when the freezing rain sensor is transient protected to meet RTCA DO160C lightning requirements and to approximately 0.50mm ice formation). The software in the non-volatile memory. An open circuit...