Met One Instruments 010C Manuale utente
Features
•Low starting threshold
•Internal heater for long bearing life
•High damping ratio
•Low profile to minimize “sensor
turbulence”
•Short delay distance
•Quick-disconnect connector
•Ingress Protection Level 65 (IP65)
•Field-replaceable electronic
components
020D Wind Direction Sensor
010C Wind Speed Sensor
010C Wind Speed Sensor
020D Wind Direction Sensor
Both wind speed and wind direction sensors
are used in environments ranging from
Antarctic cold to arid desert heat. The 010C
010C-1 and 020D instruments meet U.S. EPA
and NRC performance specifications for
critical regulatory, research or scientific
measurement applications.
The 010C Wind Speed Sensor provides accurate and detailed information on
horizontal wind speed. The lightweight three-cup anemometer is used in virtually
all applications where fast response and low starting threshold(s) are of paramount
importance.
The 020D Wind Direction Sensor provides azimuth data for use in micro-
meteorological measurements related to operational studies and research. The
lightweight airfoil vane is directly coupled to a single precision potentiometer. These
sensors are especially useful when a low starting threshold, a high damping ratio, or
a short delay distance is required.
Reliability
The 010C and 020D are made of stainless steel and anodized
aluminum components and are functionally more reliable than any
other sensors of their kind:
•BBuilt-in electrical field surge protection greatly reduces
problems associated with static fields, near-miss lightning
hits and poor grounding systems
•Inclusion of Met One Instruments’ internal heater (AC use
only) provides positive clean aspiration through the bearings, thereby
greatly increasing sensor bearing life
•Optional, external de-icing heater sleeve for applications
where freezing rain, ice and low wind speeds may be encountered
010C Wind Speed Sensor
020D Wind Direction Sensor
0-135mph (0-60m/s)
0.5 mph (0.22 m/s)
0 -112 mph (0 -50 m/s)
±1% or 0.15 mph (0.07 m/s)
Resolution <0.1 mph or m/s
-50°C to +65°C (-58°F to +149°F)
less than 5 It (1.5m) of flow (meets EPA specifications)
12 VDC at 10 mA, 12 VDC at 350 mA for internal heater
11 volt (pulse frequency equivalent to speed)
100 Ω maximum
1.5 Ibs (.68 kg)
Clear anodized aluminum; Lexan cup assembly
Cable Assembly; specify length in feet or meters
PN 191 Crossarm Assembly
Electrical 0° -357°
Mechanical 0° -360°
0.5 mph (0.22 m/s)
±1/2% of full scale
±3°
Resolution <0.1 °
Standard 0.6 (magnesium tail) (meets EPA specifications)
Less than 3 ft (91 cm)
-50°C to +65°C (-58°F to +149°F
12 VDC at 10 mA, 12 VDC at 350 mA for internal heater
0-5, 0-2.5 (optional 0-1) VDC for 0° -360°
Ωmaximum
1.5 Ibs (.68 kg)
Clear anodized aluminum
Cable Assembly; specify length in feet or meters PN 191-1
Crossarm Assembly
15 ft. (4.6 m) aluminum cup assembly (meets EPA specifications)
0.25 (aluminum tail)
010C Wind Speed Sensor
Performance Characteristics
Maximum Operating Range:
Starting Speed:
Calibrated Range:
Accuracy:
Temperature Range:
Distance Constant:
Electrical Characteristics
Power Requirements:
Output Signal:
Output Impedance:
Physical Characteristics
Weight:
Finish:
Cable & Mounting
PN 1953
Mounting:
020DWind Directon Sensor
Performance Characteristics
Azimuth:
Threshold:
Linearity:
Accuracy:
Damping Ratio:
Delay Distance:
Temperature Range:
Electrical Characteristics
Power Requirements:
Output Signal:
Output Impedance:
Physical Characteristics
Weight:
Finish:
Cable & Mounting
PN 1957
Mounting:
Wind Sensors W/ Aluminum Cups & Vane
010C Distance Constant:
020D Damping Ratio:
Specifications are subject to change at any
time.
Specifications
Technical Drawings
020D Wind Direction Sensor
191-1 Mounting Arm & 010C-020D
010C Wind Speed Sensor
1.05 (27 mm)
DIAMETER MOUNTING
1.05 (27 mm) D
SHOWN WITH
5315 ICE SKIRT
(Optional)
MS CONNECTOR
MS CONNECTOR 1553 MOUNTING ADAPTER
1686 ALIGNMENT ADAPTER
1552 MOUNTING ADAPTER
DIAMETER TO FIT
3/4” IPS PIPE 1552 MOUNTING
ADAPTER
3/4” IPS PIPE
1” DIAMETER
191-1 CROSS ARM ASSEMBLY
CABLE 1957
2.50” (64 mm)
17.75” (451 mm)
1.50 (38 mm) D
1.05 (27 mm)
DIAMETER MOUNTING
SHOWN WITH
5315 ICE SKIRT
(Optional)
MS CONNECTOR
CABLE 1953
4.50” (114 mm)
22.95” (583 mm)
22.95” (583 mm)
12.00” (305 mm)
12.00” (305 mm)
10.37” (263 mm)
VANE ROTATION DIAMETER
10.37” (263 mm)
VANE ROTATION
DIAMETER
8.00” (203 mm)
60.00” (1524 mm)
16.92” (430 mm)
16.92” (430 mm)
16.92” (430 mm)
C
L
C
L
010C Wind Speed Sensor
020D Wind Direction Sensor
August 2019
B Met One lnstruments,lnc.
1600 Washington Blvd. Grants Pass, Oregon 97526 Phone: 541.471.7111
Sales: [email protected] | Service: [email protected] | Website: www.metone.com
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 - [email protected]m
020D-9800 REV A Page 1
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.
Technical Support
Should you require support, please consult your printed documentation or our website
www.metone.com to resolve your problem. If you are still experiencing difficulty, you may
contact a Technical Service representative during normal business hours;
Monday – Friday 7:00 a.m. to 4:00 p.m. Pacific Time.
Voice: (541) 471-7111
Fax: (541) 471-7116
E-Mail: service@metone.com
Mail: Technical Services Department
Met One Instruments, Inc.
1600 NW Washington Blvd
Grants Pass, OR 97526
020D-9800 REV A Page 2
020D WIND DIRECTION SENSOR
OPERATION MANUAL
1.0 GENERAL INFORMATION
1.1 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’ Model 191-1.
1.2 The sensor cable has a quick-connect connector with vinyl-jacketed, shielded cable.
Cable length is given in-XX feet on each cable part number. A 1957-XX cable is
supplied for translators and data loggers having terminal strip connections. (Color
code, Figure 2-1).
020D-9800 REV A Page 3
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 0.4
Delay Distance Less than 3 feet
Temperature Range -50C to +85C
Electrical Characteristics
Input Power 9-18 VDC, 10 mA
Output* a. 0-5 volts for 0-360 (default setting)
b. 0-2.5 volts for 0-360 (user selectable)
Output Impedance 100 Ohms maximum
Maximum Cable Length 300 feet
Physical Characteristics
Weight 1.1 pounds
Finish Anodized Aluminum
Mounting Use with Crossarm Model 191 or equivalent
Cabling 1957-XX Cable (XX is cable length in feet)
Optional Accessories
A. External heater and power supply for extreme low temperature operation.
B. Aluminum vane assembly.
C. Model 040 Degree Wheel Calibrator.
D. Model 042 Telescopic Orientation Fixture.
020D-9800 REV A Page 4
2.0 INSTALLATION
2.1 Model 020D Wind direction Sensor Installation
A. Select output voltage range. Slide outer cover down to expose circuit board.
Connect the Yellow connector wire to J2-2 for 0-5v output, or J2-3 for 0-2.5v
output.
B. Check to see that the vane assembly rotates freely.
C. Makes sure that the vane assembly is properly balanced and that the balance
counterweight is tight. With the vane mounted, hold the sensor horizontal. Verify
balance.
D. Install the sensor in the crossarm with the keyed bushing. The orientation screw
in the stem of the wind direction sensor will fit through the hole in the mounting
bushing.
E. Connect the cable assembly to the keyed sensor receptacle and secure it to the
mounting arm using cable ties.
2.2 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. Tape the sensor hub and column together so that the notches on each part are
exactly aligned.
B. Loosen the two set screws in the alignment bushing so that the sensor and
bushing may be rotated.
C. Rotate the sensor so that vane (counterweight end) points directly south.
D. A transit located either directly south or directly north will facilitate the alignment
process; merely rotate sensor until vane and sensor column merge completely,
then tighten the set screws into the mounting bushing.
E. Optional alignment accessories are available:
1. A telescopic orientation device, which is inserted into alignment bushing
until alignment is achieved. Bushing is locked and orientation device is
removed and wind direction sensor installed.
2. A compass orientation device operates in similar manner, but is not
suitable for steel towers or poles.
020D-9800 REV A Page 5
2.3 Wiring
The cable assembly contains five wires. Typical wiring hookup is shown in Figure 2-1.
2.4 Lightning Protection
Weather sensors are sensitive to direct or nearby lightning strikes. A well-grounded
metal rod or frame should be placed above the sensor installation. 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 6
3.0 OPERATIONAL CHECK-OUT
3.1 020D Wind Direction Sensor Check-Out (standard 360 operation)
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-
scale. Movement of the module’s output will progress up-scale until the 360 (full
scale) mark has been reached; then output will drop to 0. When the notches on
the rotating hub and the column of the sensor are exactly aligned, the output
signal will correspond to 180.
3.2 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-
scale. Movement of the module’s output will progress up-scale until the 540 (full
scale) mark has been reached, and then the output will drop to 180. Continued
clockwise rotation will again bring the module’s output up-scale to 540 and the
action is repeated. When the notches on the rotating hub and the column of the
sensor are exactly aligned, the output signal will correspond to 180 (or 540 on
the expanded scale.
3.3 If the sensor heater is used, then check internal heater operation by sliding sensor
cover down and touching the housing behind the printed circuit board. The housing
should feet warmer than the adjoining metal parts. The sensor has a built-in heater
that is designed to provide a raise in the internal temperature, providing a small
positive pressure. This heater requires an external 12V (@ 350 ma) power supply.
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