Campbell-scientific 0871LH1 Freezing Rain Sensor Manual de usuario descargar pdf (Pagina 29)

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 KΩ. 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

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