All Weather Inc 2030 User manual

All Weather Inc. • 1065 National Drive • Sacramento, CA 95834 • USA • 800.824.5873 • www.allweatherinc.com
User’s
Manual
Rev. B
Model2030
MicroResponseAnemometer

Copyright ©2009–2021, All Weather, Inc.
All Rights Reserved. The information contained herein is proprietary and is provided solely for the
purpose of allowing customers to operate and/or service All Weather, Inc. manufactured equipment
and is not to be released, reproduced, or used for any other purpose without written permission of
All Weather, Inc.
Throughout this manual, trademarked names might be used. Rather than put a trademark (™)
symbol in every occurrence of a trademarked name, we state herein that we are using the names only
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infringement. All Weather, Inc. and the All Weather, Inc. logo are trademarks of All Weather, Inc.
Disclaimer
The information and specifications described in this manual are subject to change without notice.
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Sacramento, CA 95834
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Contact Customer Service
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Model 2030 Micro Response Anemometer User's Manual
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Revision History
Revision Date Summary of Changes
A 2011 Mar 11 Initial release
B 2021 Apr 2 Updated Specifications to current format

Model 2030 Micro Response Anemometer User's Manual
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TABLE OF CONTENTS
1. INTRODUCTION.........................................................................................................1
2. INSTALLATION...........................................................................................................2
2.1 Assembly ............................................................................................................................2
2.2 Site Selection......................................................................................................................2
2.3 Mounting.............................................................................................................................3
2.4 Orientation..........................................................................................................................3
2.5 Wiring.................................................................................................................................4
3. THEORY OF OPERATION......................................................................................... 5
4. CALIBRATION ............................................................................................................6
5. MAINTENANCE..........................................................................................................8
5.1 Inspecting the Bearings.......................................................................................................8
5.2 Precautions..........................................................................................................................8
5.3 Replacing the Bearings.......................................................................................................8
5.4 Maintenance Kit..................................................................................................................9
5.5 AWOS Periodic Maintenance.............................................................................................9
5.5.1 Tools and Equipment Required ..................................................................................9
5.5.2 Monthly Maintenance.................................................................................................9
5.5.3 Quarterly Maintenance................................................................................................9
5.5.4 Annual Maintenance.................................................................................................10
6. SPECIFICATIONS .................................................................................................... 11
7. WARRANTY.............................................................................................................. 12
8. DRAWINGS .............................................................................................................. 13

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1. INTRODUCTION
The Model 2030 Micro Response Anemometer is a highly responsive three-cup anemometer that
uses a photon-coupled chopper to produce an output pulse with a frequency proportional to wind
speed.
•The threshold of the anemometer is 1 mile per hour.
•The entire anemometer assembly, with the exception of the photon-coupled chopper, is
made from stainless steel, anodized aluminum, and carbon/graphite composite.
•A quick-release waterproof connector is provided.
The Model 2030 Anemometer can be used in conjunction with several interfaces:
•All Weather Inc.'s Q-Net data acquisition system
•All Weather Inc.'s Automated Weather Observing System (AWOS), interfaced to the
Model 1798 Sensor Interface Processor (SIP)
•1190 series data acquisition systems
•Model 1220 or Model 1280 Wind Speed Signal Conditioning Modules, which provide an
analog output proportional to wind speed.

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2. INSTALLATION
This instrument is thoroughly tested and fully calibrated at the factory and is ready for
installation.
2.1 ASSEMBLY
With the exception of installing the cup assembly, the Model 2030 Micro Response Anemometer
is ready for mounting. Install the cup assembly as described in the steps below.
Loosen the two set screws with a 1/16" Allen wrench, and slide the cup assembly over the
anemometer shaft. Be certain that the flat face of the shaft faces toward the set screws.
The cup assembly hub should slide down over the shaft and body and seat against the shaft ring.
When correctly in place, there should be no drag between the skirt of the hub and the shoulder of
the body. Tighten both set screws to 7 in. lbs.
Spin the cup wheel by hand to assure smooth operation. The cup wheel should coast to a smooth
stop.
2.2 SITE SELECTION
Location of the sensor is critical for accurate wind measurements. The standard exposure of an
anemometer or vane over open, level terrain is 10 meters above the ground. Open, level terrain is
defined as level ground with no obstruction within 300 meters. In locations where obstructions
are not large, such as residential areas, and are distributed more or less evenly, the sensor may be
placed at an effective height of h + 10 meters, where his the approximate height (in meters) of
the various obstacles. As an example, in a location where trees and buildings reach to about
5 meters, the sensors must be placed on a 15-meter mast to avoid erroneous results.
In areas where large obstructions do exist within 300 meters of the sensor, the following table
can be used to calculate the proper height of the sensor (his the height of the obstruction).
Table 1*
Distance to Obstruction
(h)
Minimum Height of Anemometer
Above Ground Level
h
1.75h to 2.25h
5h
1.67h
10h
1.50h
20h
1.25h
25h
1.13h
30h
h
* Handbook of Meteorological Instruments, 2nd Edition. Measurement of
Surface Wind, Volume 4. London, HMSO: 1981

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Example:
If there is a building 10 meters high and 50 meters away, the anemometer should be at least 16.7
meters above the ground. But, if the same building is 200 meters away, the sensor could be
lowered to 12.5 meters.
When the sensor is mounted on a building, the building itself disturbs the wind flow and must be
taken into account before installation. For large buildings, other than buildings such as
lighthouses and skyscrapers, the sensor must be mounted as far away from the edge of the
building as possible and at a height at least ¾ the height of the building. Thus, with a building
28 meters high, a rooftop tower at least 21 meters high should be used.
2.3 MOUNTING
The Model 2030 Micro Response Contact Anemometer mounts directly to the Model 2023
Crossarm without any additional accessories. The crossarm is generally used to mount one each
Model 2030 Anemometer and a Model 2020 Vane to form a wind speed and direction
measurement set. If the Model 2030 Anemometer is to be mounted separately, a Model 20231
Mast Adapter should be ordered as an accessory. Both the Model 2023 Crossarm and the Model
20231 Mast Adapter will mount on a mast with an outside diameter of 1" (25.4 mm) or ¾"
Schedule 40 pipe. Set screws are provided in either case for securing to the mast. The lower part
of the anemometer body will slip over the pin on the crossarm or the mast adapter. When in
place, tighten all mounting screws.
For AWOS installations, refer to the 2020/2030 AWOS Mounting figure in the Drawings
chapter of this manual.
2.4 ORIENTATION
The anemometer should be mounted with its axis as close to vertical as possible to provide for
the best measurement of horizontal wind movement. If the sensor must be removed from the
mounting adapter or crossarm, loosen only the Allen head screw on the sensor base and slide the
sensor off the adapter. Do not remove the mounting pin from the crossarm or the mast adapter
from the mast since these serve to maintain sensor alignment.

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2.5 WIRING
Figure 1 shows the sensor wiring when connecting to the Model 1190 DCP, as used in AWOS
systems. Cable number 20306 can be ordered from All Weather, Inc. for direct connection. The
cable comes with a mating connector at the sensor end and bare wires for connection at the
DCP's terminal block TB2. For other applications, when cable 20306 is not used, refer to Figure 1
as a wiring guide.
Figure 1. Sensor Wiring in Model 1190 DCP

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3. THEORY OF OPERATION
A light emitting diode in combination with a light sensitive transistor is mounted directly to the
anemometer connector. A slotted wheel connected to the anemometer shaft rotates with the shaft
and interrupts the light beam between the light emitting diode and the phototransistor. This
interruption causes a change in the transistor’s collector to emitter current.
The current changes are amplified and conditioned by the Model 1220 Wind Speed Signal
Conditioning Module, which provides an analog output signal proportional to wind speed.

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4. CALIBRATION
The slotted wheel contains 30 slots, providing thirty electrical pulses per revolution. The output
frequency of the anemometer may be determined by the following equation:
𝐹𝐻𝑧 = 9.901(𝑉𝑚𝑝ℎ− 0.476)
Or the velocity may be determined as follows:
𝑉𝑚𝑝ℎ=𝐹𝐻𝑧
9.901 + 0.476
𝑉𝑘𝑛𝑜𝑡𝑠 =𝐹𝐻𝑧
11.395 + 0.648
where FHz is the frequency in Hertz, Vmph is the velocity in miles/hour, and Vknots is the velocity in
knots.
Calibration data in Table 2 were compiled from tests in which the anemometer was operated in a
wind tunnel equipped with NIST-traceable measuring instruments.
Table 2. Model 2030 Anemometer Calibration Table
Frequency
(Hz)
Shaft Speed
(rpm)
Wind Speed
(mph)
Wind Speed
(m/s)
Wind Speed
(knots)
25
50
3.27
1.46
2.84
30
60
3.78
1.69
3.28
150
300
15.90
7.11
13.82
450
900
46.20
20.65
40.14
750
1500
76.50
34.20
66.47
900
1800
91.65
40.97
79.64
983
1965
100.00
44.70
86.89
1100
2200
111.85
50.00
97.19
The Model 1220 Wind Speed Signal Conditioning Module is equipped with a calibration feature
consisting of a constant frequency oscillator and a switch to apply the oscillator to the signal
conditioning circuitry. This feature allows the operator to quickly set up the output signals for
zero and full-scale values. Refer to the Model 1220 manual for additional information.
To verify calibration of the anemometer, rotate the anemometer shaft at one of the known rpm
values shown in Table 2 and measure the sensor output with a frequency counter or oscilloscope.
If a Model 1220 module is used, place the module into OPERATE mode and measure the
frequency between the BLK/WHT and the BLK test points (TP110 and TP100). The measured
frequency should equal the value indicated in the calibration table.