Campbell 03002 User manual

Revision: 07/2022
Copyright © 1986 – 2022
Campbell Scientific, Inc.

Table of contents
1. Introduction 1
2. Precautions 1
3. Initial inspection 1
4. QuickStart 2
5. Overview 4
6. Specifications 5
6.1 Wind speed (anemometer) 5
6.2 Wind direction (vane) 6
6.3 Wind sentry assembly 7
7. Installation 7
7.1 Wiring 7
7.2 Programming 9
7.2.1 Wind speed 9
7.2.2 Wind direction 10
7.2.3 WindVector processing instruction 11
7.3 Siting 11
7.4 Assembly and mounting the 03002 11
7.5 Mounting the 03101 anemometer to a crossarm 13
7.6 Mounting the 03301 vane 14
8. Sensor maintenance 14
9. Troubleshooting 15
9.1 Wind direction 15
9.2 Wind speed 16
10. References 16
Appendix A. Importing Short Cut code into CRBasic Editor 17
Appendix B. Example program 18
Appendix C. Wind direction sensor orientation 20
C.1 Determining true north and sensor orientation 20
Table of Contents - i

Appendix D. Wind direction measurement theory 23
Table of Contents - ii

1. Introduction
The 03002 Wind Sentry Set measures both wind speed and direction. It consists of a 3-cup
anemometer and a wind vane mounted on a small crossarm. The anemometer and vane may be
purchased separately.
NOTE:
This manual provides information only for CRBasic data loggers. For retired Edlog data logger
support, see an older manual at www.campbellsci.com/old-manuals .
2. Precautions
lREAD AND UNDERSTAND the Safety section at the back of this manual.
lThe 03002 is a precision instrument. Please handle it with care.
lDo not use cable lengths greater than 30 m (9 ft) in electrically noisy environments.
lThe black outer jacket of the cable is Santoprene® rubber. This compound was chosen for
its resistance to temperature extremes, moisture, and ultraviolet (UV) degradation.
However, this jacket will support combustion in air. It is rated as slow burning when tested
according to U.L. 94 H.B. and will pass FMVSS302. Local fire codes may preclude its use
inside buildings.
lWire color and functions of sensors purchased through Campbell Scientific may not
correspond with the wire colors and functions given in the manufacturer’s manual. To
ensure proper function, follow the wiring provided in Short Cut or in the Campbell Scientific
manual.
3. Initial inspection
lUpon receipt of the 03002, inspect the packaging and contents for damage. File damage
claims with the shipping company. Immediately check package contents against the
shipping documentation. Contact Campbell Scientific about any discrepancies.
Wind Sentry Series 1

lThe model number and cable length are printed on a label at the connection end of the
cable. Check this information against the shipping documents to ensure the expected
product and cable length are received.
lThe sensor is shipped with the cup wheel unattached to the anemometer shaft. Refer to the
Assembly and mounting the 03002 (p. 11) section.
4. QuickStart
A video that describes data logger programming using Short Cut is available at:
www.campbellsci.com/videos/cr1000x-datalogger-getting-started-program-part-3 .Short Cut
is an easy way to program your data logger to measure this sensor and assign data logger wiring
terminals. Short Cut is available as a download on www.campbellsci.com . It is included in
installations of LoggerNet,RTDAQ, or PC400.
The following procedure shows using Short Cut to program the 03002.
1. Open Short Cut and create a new program.
2. Double-click the data logger model.
3. In the Available Sensors and Devices box, type 03002 or find the sensor in the Sensors >
Meteorological >Wind Speed & Direction folder. Double-click 03002 Wind Speed &
Direction Sensor. The wind speed defaults to meters/second. This can be changed by
clicking the Wind Speed box and selecting one of the other options.
Wind Sentry Series 2

4. Click on the Wiring tab to see how the sensor is to be wired to the data logger. Click OK
after wiring the sensor.
5. Select any other sensors you have, then finish the remaining Short Cut steps to complete
the program.
6. In Output Setup, enter the scan rate and Data Output Storage Interval.
Wind Sentry Series 3

7. Select the output options.
8. Click Finish and save the program. Send the program to the data logger if the data logger
is connected to the computer.
9. If the sensor is connected to the data logger, check the output of the sensor in the data
display in LoggerNet,RTDAQ, or PC400 to make sure it is making reasonable
measurements.
5. Overview
The 03002 Wind Sentry Set is used to measure horizontal wind speed and direction.
Wind speed is measured with a three-cup anemometer. Rotation of the cup wheel produces an
ac sine wave voltage with frequency proportional to wind speed. This is a special version of the
03102 built for Campbell Scientific by R. M. Young that has shielded bearings rather than sealed
bearings. The shielded bearings provide a lower starting threshold than sealed bearings.
Vane position is transmitted by a 10kΩ potentiometer. With a precision excitation voltage
applied, the output voltage is proportional to wind direction.
The 03101 Anemometer and 03301 Vane can be ordered as separate sensors, which are also
covered in this manual. These two sensors combined differ from the 03002 only by the absence
of a junction box. The R. M. Young 03002 manual (see References [p. 16]) includes additional
information on the operating principles, installation, and maintenance of the sensor.
Wind Sentry Series 4

Cable length for the Wind Sentry is specified when the sensor is ordered. Table 5-1 (p. 5) gives the
recommended cable length for mounting the sensor at the top of the tripod/tower with a
CM200-series crossarm.
Table 5-1: Recommended cable lengths
CM106B CM110 CM115 CM120 UT10 UT20 UT30
4.2 m (14 ft) 4.2 m (14 ft) 5.8 m (19 ft) 7.3 m (24 ft) 4.2 m (14 ft) 7.3 m (24 ft) 11.3 m (37 ft)
NOTE:
Maximum cable length is 304.8 m (1000 ft).
CAUTION:
Do not use cable lengths greater than 30 m (9 ft) in electrically noisy environments.
Features:
lDesigned for continuous, long term, unattended operation in adverse conditions
lSmall size, simplicity, and rugged construction provide a quality instrument for a modest
price
lIdeal for wind profile studies
lCampbell Scientific version uses shielded bearings, which lowers the anemometer starting
threshold
lCompatible with the LLAC4 4-channel Low Level AC Conversion Module, which increases
the number of anemometers one data logger can measure
lCompatible with Campbell Scientific CRBasic data loggers: CR6, CR1000X, CR800 series,
CR350 series, CR300 series, CR3000, and CR1000
6. Specifications
6.1 Wind speed (anemometer)
Range: 0 to 50 m/s (112 mph), gust survival 60 m/s (134 mph)
Sensor: 12 cm diameter cup wheel assembly, 40 mm diameter hemispherical
cups
Wind Sentry Series 5

Accuracy: ±0.5 m/s (1.1 mph)
Turning factor: 75 cm (2.5 ft)
Distance constant
(63% recovery): 2.3 m (7.5 ft)
Threshold: 0.5 m/s (1.1 mph)
Transducer: Stationary coil, 1300-ohm nominal resistance
Output: AC sine wave signal induced by rotating magnet on cup wheel shaft
100 mV peak-to-peak at 60 rpm; 6 V peak-to-peak at 3600 rpm
Output frequency: 1 cycle per cup wheel revolution; 0.75 m/s per Hz
Cup wheel diameter: 12 cm (4.7 in)
Weight: 113 g (4 oz)
6.2 Wind direction (vane)
Range: 360° mechanical, 352° electrical (8° open)
Sensor: Balanced vane, 16 cm turning radius
Settling time: 20 ms
Damping ratio: 0.2
Delay distance
(50% recovery): 0.5 m (1.6 ft)
Threshold: 0.8 m/s (1.8 mph) at 10° displacement
(1.8 m/s (4 mph) at 5° displacement)
Transducer: Precision conductive plastic potentiometer; 10 kΩ resistance; 1.0%
linearity; life expectancy 50 million revolutions
Rated 1 W at 40 °C, 0 W at 125 °C
Transducer excitation
Requirement: Regulated DC voltage, 15 VDC max
Output: Analog DC voltage proportional to wind direction angle with
regulated excitation voltage supplied by the data logger
Vane length: 22 cm (8.7 in)
Vane weight: 170 g (6 oz)
Wind Sentry Series 6

6.3 Wind sentry assembly
Operating temperature: –50 to 50 °C assuming non-riming conditions
Overall height: 32 cm (12.6 in)
Crossarm length: 40 cm (15.7 in) between instruments (center-to-center)
Mounting diameter: 34 mm (1.34 in), mounts on standard 1 inch IPS pipe
7. Installation
If you are programming your data logger with Short Cut, skip Wiring (p. 7) and Programming (p.
9). Short Cut does this work for you. See QuickStart (p. 2) for a Short Cut tutorial.
7.1 Wiring
Connections to CRBasic data loggers are given in Table 7-1 (p. 7), Table 7-2 (p. 8), and Table 7-3
(p. 8). When Short Cut software is used to create the data logger program, the sensor is wired to
the terminals shown in the wiring diagram created by Short Cut.
Table 7-1: 03002 Wind Sentry Set wire color, wire function, and data logger connection
Wire color Wire function Data logger connection terminal
Red WS signal Uconfigured for pulse input1,P(pulse input),
or P_LL (pulse, low-level ac)
Black WS signal reference ⏚
Green WD signal Uconfigured for single-ended analog input1,
SE (single-ended, analog input)
Blue WD voltage excitation Uconfigured for voltage excitation1,EX,
or VX (voltage excitation)
White WD signal reference ⏚(analog ground)
Clear Shield ⏚(analog ground)
1Uterminals are automatically configured by the measurement instruction.
Wind Sentry Series 7

Table 7-2: 03101 anemometer wire color, wire function, and data logger connection
Wire color Wire function Data logger connection terminal
Black WS signal Uconfigured for pulse input1,P(pulse input),
or P_LL (pulse, low-level ac)
White WS signal reference ⏚
Clear Shield ⏚(analog ground)
1Uterminals are automatically configured by the measurement instruction.
Table 7-3: 03301 vane wire color, wire function, and data logger connection
Wire color Wire function Data logger connection terminal
Red WD signal Uconfigured for single-ended analog input1,
SE (single-ended, analog input)
Black WD voltage excitation Uconfigured for voltage excitation1,EX,
or VX (voltage excitation)
White WD signal reference ⏚(analog ground)
Clear Shield ⏚(analog ground)
1Uterminals are automatically configured by the measurement instruction.
Wind Speed 03101 Wind Direction 03301
Wind Sentry Series 8

7.2 Programming
Short Cut is the best source for up-to-date data logger programming code. If your data
acquisition requirements are simple and you are connecting the sensor to a pulse terminal, you
can probably create and maintain a data logger program exclusively by using Short Cut. If your
data acquisition needs are more complex, the files that Short Cut creates are a great source for
programming code to start a new program or add to an existing custom program.
NOTE:
Short Cut cannot edit programs after they are imported and edited in CRBasic Editor.
AShort Cut tutorial is available in QuickStart (p. 2). If you wish to import Short Cut code into
CRBasic Editor to create or add to a customized program, follow the procedure in Importing
Short Cut code into CRBasic Editor (p. 17). Programming basics for CRBasic data loggers are
provided in the following sections. A complete program is provided in Example program (p. 18).
Programming basics and programming examples for Edlog data loggers are provided at
www.campbellsci.com\old-manuals .
7.2.1 Wind speed
Wind speed is measured by using the PulseCount() instruction. Syntax of the the
PulseCount() instruction is:
PulseCount(Dest, Reps, PChan, PConfig, POption, Mult, Offset)
Set the PConfig parameter to Low Level AC and the POption parameter to Frequency.
The expression for wind speed (U) is:
U = Mx + B
where
M = multiplier
x = number of pulses per second (Hertz)
B = offset
Table 7-4 (p. 10) lists the multipliers to obtain miles/hour or meters/second when the
measurement instruction is configured to output Hz.
Wind Sentry Series 9

Table 7-4: Wind speed multiplier
(with pulse terminal configuration set to Low Level AC, output “Hz”)
Model Meters/second Miles/hour
03002 / 03101 M = 0.750
Off = 0.2
M = 1.677
Off = 0.4
*When the pulse terminal configuration is set to Low Level AC, output “counts”,
the multiplier above is divided by the execution interval in seconds.
7.2.2 Wind direction
The wind vane is coupled to a 10kΩ potentiometer, which has a 8-degree electrical dead band
between 352 and 360 degrees. A 1MΩ resistor between the signal and ground pulls the signal to
0 mV (0 degrees) when wind direction is in the dead band (between 352 and 360 degrees).
Wind direction is measured by the BRHalf() instruction.
Some CRBasic measurement sequences can cause the measurement of the wind direction to
return a negative wind direction (–30º) while in the dead band. To overcome this problem, all
program examples use a delay of 20 ms (20,000μs) and set any negative wind direction values to
0.0: If WindDir < 0, then WindDir = 0.0.
The excitation voltage, range codes, and multipliers for the different data logger types are listed
in Table 7-5 (p. 10). Wind direction measurement theory (p. 23) has additional information on the
BRHalf() measurement instruction.
Table 7-5: Parameters for wind direction
CR300
Series
CR800,
CR850,
CR1000
CR1000X CR6 CR3000
Measurement range mV2500 mV2500 mV5000 mV5000 mV5000
Excitation voltage 2500 mV 2500 mV 2500 mV 2500 mV 5000 mV
Reverse excitation NA True True True True
Delay or settling time 20000 µs 20000 µs 20000 µs 20000 µs 20000 µs
Multiplier 352 352 352 352 352
Offset 0 0 0 0 0
Wind Sentry Series 10

7.2.3 WindVector processing instruction
The WindVector output is used to process and store mean wind speed, unit vector mean wind
direction, and standard deviation of the wind direction (optional) by using the measured wind
speed and direction samples.
7.3 Siting
Locate wind sensors away from obstructions such as trees or buildings. Generally, there should
be a horizontal distance of at least ten times the height of the obstruction between the wind
monitor and the obstruction. If the sensors need to be mounted on a roof, the height of the
sensors above the roof, should be at least 1.5 times the height of the building. See References (p.
16) for a list of references that discuss siting wind speed and direction sensors.
7.4 Assembly and mounting the 03002
Materials required:
l5/64 inch hex key wrench
l1/2 inch open end wrench
lCompass and declination angle for the site (see Wind direction sensor orientation [p. 20])
lSmall screw driver provided with data logger
lUV resistant cable ties
l6 to 10 inch torpedo level
lUnthreaded aluminum pipe, 1-inch IPS, 12-inch length (shipped with the sensor)
l1-inch-by-1-inch Nu-Rail crossover fitting
lCup wheel
l03002 assembly
The following procedure is for assembling the sensor and mounting it to a crossarm.
1. Install the cup wheel to the anemometer shaft using the hex key wrench provided with the
sensor.
Wind Sentry Series 11

2. Mount a crossarm to a tripod or tower.
Figure 7-1. 03002 mounted to a crossarm with 1 x 1 inch Nu-Rail fitting
3. If a pyranometer is also being mounted on the crossarm, orient the crossarm north-south
with the Nu-Rail on the end farthest from the equator. Otherwise, the crossarm may be
oriented north-south, east west, or any other angle desired. Wind direction sensor
orientation (p. 20) contains detailed information on determining true north by using a
compass and the magnetic declination for the site.
4. Secure the 12-inch aluminum pipe to the Nu-Rail fitting.
5. Place the 03002 on the pipe, and orient the sensor crossarm North-South with the vane to
the North.
6. Tighten the mounting post band clamp. Final sensor orientation is done after the data
logger has been programmed to measure wind direction as described in Wind direction
sensor orientation (p. 20).
7. Use the torpedo level to ensure that the sensor is level.
8. Route the sensor cable along the underside of the crossarm to the tripod or tower, and to
the instrument enclosure.
9. Secure the cable to the crossarm and tripod or tower by using cable ties.
The 03002 can also use a CM221 Right-Angle Mounting Kit or CM216 Sensor Mounting Kit; see
the following figures. The CM221 uses U-bolts to secure the sensor to a crossarm. The CM216
mounts the sensor on top of a CM106B, CM110, CM115, or CM120 tripod. The CM216 extends
10cm (4in) above the mast of the tripod.
Wind Sentry Series 12

Figure 7-2. CM221 Right-Angle Mounting Kit
Figure 7-3. The CM216 allows an 03002 or 03101 to mount atop a tripod mast
7.5 Mounting the 03101 anemometer to a
crossarm
1. Install the cup wheel to the anemometer shaft using the hex key wrench provided with the
sensor.
2. Mount a crossarm to a tripod or tower.
3. Secure the 3/4-inch IPS, 10-inch-long, threaded aluminum pipe to the CM220 mount or
3/4 x 1 inch Nu-Rail fitting (Figure 7-4 [p. 14]).
4. Place the 03101 on the pipe.
5. Route the sensor cable along the underside of the crossarm to the tripod or tower, and to
the instrument enclosure.
6. Secure the cable to the crossarm and tripod or tower by using cable ties.
Wind Sentry Series 13

Figure 7-4. 03101 mounted to a crossarm via a 3/4 x 1 inch Nu-Rail fitting
7.6 Mounting the 03301 vane
The 03301 wind vane has three mounting options:
lNo Mounting (option –NM) is used when the 03301 will be replacing an existing 03301
within a Wind Sentry Set.
lPipe Offset Mount (option –P) is used when the 03301 will be deployed on its own next to
an anemometer that already has its own mount. With this option, the 03301 mounts to a
crossarm using the CM220 mount or 3/4 x 1 inch Nu-Rail fitting.
l03101 Conversion Kit (option –SM) is used when the 03301 will be mounted next to a
previously purchased 03101 Anemometer (Wind Sentry Anemometer). This conversion kit
includes the crossarm and other hardware to mount both sensors to a common crossarm
as if they had been purchased originally as a complete Wind Sentry Set.
8. Sensor maintenance
Every month do a visual/audio inspection of the anemometer at low wind speeds. Verify that the
propeller and wind vane bearing rotate freely. Inspect the sensor for physical damage.
Wind Sentry Series 14

Replace the anemometer bearings when they become noisy, or the wind speed threshold
increases above an acceptable level. The condition of the bearings can be checked by using the
Propeller Torque Disc as described in the R. M. Young manual (see www.youngusa.com/product-
category/wind-sensors-accessories ).
The potentiometer has a life expectancy of fifty million revolutions. As it becomes worn, the
element can produce noisy signals or become non-linear. Replace the potentiometer when the
noise or non-linearity becomes unacceptable.
NOTE:
Campbell Scientific recommends factory replacement of the bearings and potentiometer.
Refer to the Assistance page of this document for the procedure of acquiring a Returned
Materials Authorization (RMA). Mechanically-adept users may choose to replace the bearings
or potentiometer themselves. Instructions for replacing the bearings and potentiometer are
given in R. M. Young manuals (www.youngusa.com) ).
9. Troubleshooting
9.1 Wind direction
Symptom: NAN, –9999, or no change in direction
1. Check that the sensor is wired to the excitation and single-ended terminal specified by the
measurement instruction.
2. Verify that the excitation voltage and range code are correct for the data logger type.
3. Disconnect the sensor from the data logger and use an ohmmeter to check the
potentiometer. Resistance should be about 10kΩ between the wind direction signal and
reference wires. The resistance between either the black/red or white/red wires for the
03301 and blue/green or white/green wires for the 03002 should vary from 1kΩ to 11kΩ
depending on vane position. Resistance when the vane is in the 8-degree dead band
should be about 1MΩ.
Symptom: Incorrect wind direction
1. Verify that the excitation voltage, range code, multiplier and offset parameters are correct
for the data logger type.
2. Check orientation of sensor as described in Assembly and mounting the 03002 (p. 11).
Wind Sentry Series 15

9.2 Wind speed
Symptom: No wind speed
1. Check that the sensor is wired to the pulse terminal specified by the pulse count instruction.
2. Disconnect the sensor from the data logger and use an ohmmeter to check the coil. The
resistance between the white and black wires for the 03101 and black and red wires for the
03002 should be a nominal 1300Ω. Infinite resistance indicates an open coil; low resistance
indicates a shorted coil.
3. Verify that the configuration code, and multiplier and offset parameters for the pulse count
instruction are correct for the data logger type.
10. References
Component part numbers and other information is available in the R. M. Young 03002 manual
available at www.campbellsci.com/03002-wind-sentry . Because Campbell Scientific cables the
sensor, the wiring in the R. M. Young manual will be different than the wiring listed in this manual.
The following references give detailed information on siting wind speed and wind direction
sensors.
EPA, 1989: Quality Assurance Handbook for Air Pollution Measurements System, Office of
Research and Development, Research Triangle Park, NC, 27711.
EPA, 1987: On-Site Meteorological Program Guidance for Regulatory Modeling Applications, EPA-
450/4-87-013, Office of Air Quality Planning and Standards, Research Triangle Park, NC
27711.
The State Climatologist, 1985: Publication of the American Association of State Climatologists:
Height and Exposure Standards, for Sensors on Automated Weather Stations, vol. 9, No. 4.
WMO, 1983: Guide to Meteorological Instruments and Methods of Observation, World
Meteorological Organization, No. 8, 5th edition, Geneva, Switzerland.
Wind Sentry Series 16

Appendix A. Importing Short
Cut code into CRBasic Editor
Short Cut creates a .DEF file that contains wiring information and a program file that can be
imported into the CRBasic Editor. By default, these files reside in the C:\campbellsci\SCWin folder.
Import Short Cut program file and wiring information into CRBasic Editor:
1. Create the Short Cut program. After saving the Short Cut program, click the Advanced tab
then the CRBasic Editor button. A program file with a generic name will open in CRBasic.
Provide a meaningful name and save the CRBasic program. This program can now be
edited for additional refinement.
NOTE:
Once the file is edited with CRBasic Editor,Short Cut can no longer be used to edit the
program it created.
2. To add the Short Cut wiring information into the new CRBasic program, open the .DEF file
located in the C:\campbellsci\SCWin folder, and copy the wiring information, which is at
the beginning of the .DEF file.
3. Go into the CRBasic program and paste the wiring information into it.
4. In the CRBasic program, highlight the wiring information, right-click, and select Comment
Block. This adds an apostrophe (') to the beginning of each of the highlighted lines, which
instructs the data logger compiler to ignore those lines when compiling. The Comment
Block feature is demonstrated at about 5:10 in the CRBasic | Features video .
Wind Sentry Series 17