Campbell Scientific 0871LH1 Freezing Rain Sensor - Manual (Page 29)

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0871LH1 model uses this feedback to verify that the ice output is
operating correctly.
To interface to the 0871LH1, the power supply must provide a pull-up of
5.3 volts maximum. When the ice output is inactive (open), the nominal
resistance to ground is 10.1 K
Ω. The power supply should source at least
0.250 mA to provide the proper signal to the Ice Signal feedback circuitry.
When the output is active (closed), it is capable of sinking 50 mA and is
guaranteed to be no more than 1.5 VDC with respect to Signal Return.
2 Qualification Capabilities
Table 9. 0871LH1 Ice Detector Qualification Capabilities
Test Name Test Requirement
EMC DO-160C:
Audio Freq Susc:
Cat Z
Induced Signal: Cat Z
Susc: Chg Notice 3, Cat R
RF Susceptibility: Cat Z
RF Emissions: Cat Z
Lightning Induced
Susceptibility DO-160C:
Multiple Burst:
Waveform 3 & 4: Level 3
Multiple Stroke: Waveform 3: Level 3
Temperature Variation DO-160C: Cat A
Temperature/Altitude DO-160C: Cat D2 (-55°C to +71°C)
Vibration DO-160C: Cat E (Random, 7.9 grms)
Operation Shock, Crash Safety DO-160C: Shock
Salt Spray DO-160C: Cat S
Humidity DO-160C: Cat B
Icing Performance Rosemount Aerospace, Inc. Test Procedure
Power Input DO-160C: Cat Z, 18 - 29.5 VDC
Voltage Spike DO-160C: Cat A
Magnetic Effect DO-160C: Cat A (1 deflection at 0.5m)
Bonding 2.5 mW Max. Mounting Plate to Aircraft Structure
10 mW Max. Connector Shell to Mounting Plate
Dielectric Withstanding MIL-STD 202, 500 VAC, 60 Hz, EMI Filters Disconnected
Insulation Resistance MIL-STD 202, 500 VDC, 1000 MW, EMI Filters Disconnected
Fluid Susceptibility DO-160C: Cat F
Waterproofness DO-160C: Cat W
Fungus Resistance DO-160C: Cat F
Sand and Dust DO-160C: Cat D
Direct Lightning Strike DO-160C: Cat 1A
Software DO-178B used as a guideline