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Physical Description
The freezing rain sensor is an integrated unit containing both the
sensor and processing electronics. It contains a 2.9” (7.35 cm)
square faceplate for mounting to the 0871LH1MNT and a 2.86”
(7.28 cm) diameter housing containing the processing electronics.
The unit weighs 0.7 lbs. (318 grams), maximum.
Figure 3 Ice Detector
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Temperature Considerations
In the case of unit malfunction causing strut heater lock-on, the
probe temperature can exceed 204.4°C. Maintenance personnel
should exercise caution when servicing the unit.
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Power Interruptions
The freezing rain sensor is qualified to DO-160C power input
category Z. The unit will remember status through a 200 ms
power interruption, but the output string will cease during the
interruption.
The freezing rain sensor uses a power fail monitor to verify the
supply voltage. If a power fault is detected the freezing rain
sensor is halted with a failure indication on the STATUS discrete
output.
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