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Summary of Contents for Met One Instruments 020D
- Page 1 MODEL 020D WIND DIRECTION SENSOR OPERATION MANUAL Document No 020D-9800 Met One Instruments, Inc Corporate Sales & Service: 1600 NW Washington Blvd. Grants Pass, OR 97526 Tel (541) 471-7111 Fax (541) 471-7116 www.metone.com www.service@metone.com...
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Page 2: Copyright Notice
Copyright Notice © Copyright 2020 Met One Instruments, Inc. All Rights Reserved Worldwide. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language in any form by any means without the express written permission of Met One Instruments, Inc. -
Page 3: General Information
OPERATION MANUAL GENERAL INFORMATION The Model 020D Wind Direction Sensor uses a lightweight, vane and a micro torque potentiometer to produce an analog voltage output proportional to wind direction. An internal heater reduces moisture for extended bearing life. The sensor mounts in a crossarm assembly, such as the Met One Instruments’... - Page 4 Model 020D Wind Direction Sensor Specifications Performance Azimuth Electrical 0-356, Mechanical 0-360 Threshold 0.6 mph Linearity ½% of full scale Accuracy 3 Damping Ratio Delay Distance Less than 3 feet Temperature Range -50C to +85C Electrical Characteristics Input Power...
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Page 5: Installation
Model 020 Wind Direction Sensor Alignment (Refer to Figure 2-1 “Typical 020D Installation”). The Orientation screw located on the stem of the sensor is to be oriented so that it points south. Proceed as follows: A. - Page 6 In addition, the shield on the signal cable (white/brown wire) must be connected to a good earth ground at the translator end, and the cable route should not be vulnerable to lightning. 020D-9800 REV A Page 5...
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Page 7: Operational Checkout
180. 020D Wind Direction Sensor Check-Out (with 540 conversion electronics) A. With the sensor connected to the input, upon movement of the sensor’s vane in a clockwise direction (as seen from above), the module’s output will move up-... -
Page 8: Maintenance And Troubleshooting
B. Calibration as required per Section 4.4. 12-24 Month Intervals: A. Replacement of sensor bearings as per Section 4.5. B. Replacement of potentiometer as per Section 4.6 Table 4-1 020D Wind Direction Sensor Troubleshooting Symptom Probable Cause Solution Refer to... - Page 9 020D Wind Direction Sensor: 6-12 Month Periodic Service (Refer to Assembly Drawing) A. At the crossarm assembly, disconnect the quick disconnect plug from the sensor (leave the cable secured to the crossarm). Remove the sensor from the crossarm assembly bushing. Leave the bushing secure in the fitting.
- Page 10 020D Wind direction Sensor Maintenance (Refer to 020D drawing for assembly information) The following procedures require a relatively clean, dry work area, a source of 12 VDC power at approximately 20 mA, a Model 040 Degree Wheel, and a 4-1/2 digit or better digital voltmeter.
- Page 11 Sensor Bearing Replacement (Refer to 020D Sensor Assembly drawing) A. Remove sensor from tower and remove vane assembly. Refer to Section 4.2. B. Disassemble sensor and remove old bearing. (#6)(Refer to Assembly Drawing) 1. Slide the sensor cover (18) down to expose the potentiometer assembly (23) and circuit board assembly (15).
- Page 12 D. Recalibrate sensor as per Section 4.4. E. Replace vane assembly and reinstall (refer to Section 2.1). 2840 Circuit Board Assembly replacement. (Refer to 020D Assembly drawing) A. Remove sensor from tower and remove vane assembly (refer to Section 4.2).
- Page 13 020D Wind Direction Sensor Repair and Recalibration Service The factory provides fast, economical service for the user. This repair and calibration service includes disassembly and detailed inspection of all moving mechanical parts and electronic components. Service includes replacement of bearings, regardless of apparent condition, calibration, and functional test of sensor.
- Page 14 020D-9800 REV A Page 13...
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