Campbell Scientific 0871LH1 Freezing Rain Sensor - Manual (Page 9)

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6 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.
7 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.
8 Mounting Considerations
Figure 4 Mounting (part number 0871LH1 MNT)
The freezing rain sensor should be mounted to a sturdy crossarm located
away from buildings or other obstacles that could shadow the sensing
element from freezing rain. The sensor should be installed so that the
sensing probe is a minimum of 92cm (36”) above the ground.
1. Remove the protective tube from strut.
2. Attach the freezing rain sensor to the mounting bracket using the
supplied ¼ - 20 screws and lock washers. Position the freezing rain sensor
on the mounting pole with the sensing probe pointing upward, with the
bracket inclined at a 20° - 30° angle above horizontal to ensure proper
drainage of melted ice.
3. Attach to a vertical or horizontal pipe using the supplied V bolts, nuts and
washers. NOTE: The sensor should be mounted so as to be oriented into
the prevailing wind.
4. Connect cable to 0871LH1 connector and secure cable to bracket with
cable ties.
5. Remove shipping cover and protective cap prior to powering on the unit.