0871LH1 CAMPBELL | Alldatasheet
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=) SCIENTIFIC Overview The 0871LH1, manufactured by Goodrich, is a sensor that detects the presence of icing conditions so that appropriate actions can be taken to prevent damage to power and Benefits and Features / PRODUCT o et (o= 0871LH1 Freezing-Rain Sensor Warns of Ice Danger Protects roads, power lines, aircraft, wind turbines communication lines, to warn of road hazards, or to keep ice off wind turbine blades or a plane’s wings. ) Can be used to help prevent damage to power lines, and to warn of icy road hazards, ice on planes' wings, and ice on wind turbine blades ) Automatically defrosts itself when ice accumulation reaches 0.5 mm Detailed Description The 0871LH1 uses resonant frequencies to determine the presence of icing conditions. Its main component is a nickel alloy rod that has a natural resonant frequency of 40 kHz. As ice collects on the rod, the added mass causes the resonant frequency to decrease. When the frequency decreases to 130 Hz (or 0.02-in. layer of ice), an internal heater automatically defrosts the sensor. Wind Energy Applications The 0871LH1 can detect ice on a wind turbine’s blade, which is undesirable because: ) Blade can throw large chunks of ice a considerable distance —an extremely dangerous, potentially lethal situation. For comprehensive details, visit: www.campbellsci.com/0871lh1 ) Formation of ice can cause unbalanced loading on the turbine’s blades, bearings, and gear box. ) Ice reduces the turbine’s power output. The 0871LH1 can be used for wind prospecting applications by helping predict the amount of time a potential wind power site may be out of commission due to icing conditions. Additionally, the sensor lets users know when ice is preventing their wind sensors from providing data.
Measurement Description Ice detected/no ice detected Range State dependent (ICE = 1,NO ICE =0) Set Point Ice signal activates when probe ice thickness exceeds 0.5 mm +0.13 mm (0.02in.+£0.006 in) RS-422 output operates at 9600 bps. -55°t0 +71°C Output Format Operating Temperature Range Storage Temperature Range-65° to +90°C Random Vibration 7.9 grms (DO-160C, Category E) Shock DO-160C Operating Voltage 1810295 Vdc Base Diameter 732cm (2881n) Base Height 381cm (15in) Strut Diameter 310cm (1.221n) Strut Height 254cm (1.00n) Plate Dimensions 737x737x0.22cm (29x 2.9x 0.085in) Rod Diameter 064cm (0251n) Rod Height 254cm (1.00n) Weight 03kg (0.7 Ib) Power Draw @ 24 Vdc Sensing Mode 5 W (maximum) Deicing Mode 27 W (maximum) Operating Modes Sensing Operating with no ice or with probe ice thickness below the set point Deicing Operating with probe ice thickness exceeding the set point Discrete Output Signals Ice Signal (No Icing) Open Ice Signal (Icing Detected) Ground Status Signal (Operating ~ Ground Correctly) Status Signal (Failure Open Detected) RS-422 Output Signals Ice Signal 0=Nolce 1=lce Fail State 1 = Fail 0 = No Fail (OK) Built-in Test (BIT) Commanded Performed at initial power-up. Ifa failure is detected and verified, the ice detector stops detecting and annunciating icing conditions, the heaters are disabled, and a failure is annunciated. Continuous Hardware and software BIT verifies that internal electronics are functioning properly. Electrical Connectors Mechanical MS27474T10B199PN Mating MS27474T10B199SN For comprehensive details, visit: www.campbellsc.com/0871lh1 CAMPBELL Campbell Scientific, Inc. | 815W1800N | Logan, UT84321-1784 | (435)227-9120 | www.campbellscicom SCIENTIFIC AUSTRALIA | BRAZIL | CANADA | CHINA | COSTARICA | FRANCE | GERMANY | INDIA | SOUTH AFRICA | SPAIN | THAILAND | UK | USA ©2020 Campbell Scientific,Inc. | 07/01/2020