Campbell 27106T User manual
27106T Gill Propeller
Anemometer
Revision: 2/11
Copyright © 1984-2011
Campbell Scientific, Inc.
PLEASE READ FIRST
About this manual
Please note that this manual was originally produced by Campbell Scientific Inc. (CSI) primarily
for the US market. Some spellings, weights and measures may reflect this origin.
Some useful conversion factors:
Area: 1 in2(square inch) = 645 mm2
Length: 1 in. (inch) = 25.4 mm
1 ft (foot) = 304.8 mm
1 yard = 0.914 m
1 mile = 1.609 km
Mass: 1 oz. (ounce) = 28.35 g
1 lb (pound weight) = 0.454 kg
Pressure: 1 psi (lb/in2) = 68.95 mb
Volume: 1 US gallon = 3.785 litres
In addition, part ordering numbers may vary. For example, the CABLE5CBL is a CSI part
number and known as a FIN5COND at Campbell Scientific Canada (CSC). CSC Technical
Support will be pleased to assist with any questions.
27106T Table of Contents
PDF viewers note: These page numbers refer to the printed version of this document. Use
the Adobe Acrobat® bookmarks tab for links to specific sections.
1. General Description.....................................................1
2. Specifications ..............................................................1
3. Installation....................................................................2
3.1 Unpack Equipment and Assemble the 27106T.........................................2
3.2 Mounting to Crossarm ..............................................................................3
4. Wiring............................................................................5
5. Programming ...............................................................5
5.1 Wind Speed Multiplier and Offset............................................................5
5.2 Example Programs....................................................................................6
5.2.1 CR1000 Example Program .............................................................6
5.2.2 CR10X Example Program ..............................................................7
6. Sensor Maintenance....................................................8
6.1 Flange Bearing Replacement....................................................................8
6.2 Tach-Generator Replacement ...................................................................9
7. Troubleshooting ........................................................10
8. References .................................................................10
Figures
3-1. 27106T Mounted to a Crossarm via the CM220 .....................................4
3-2. 27106T Mounted to a Crossarm via a NU-RAIL Fitting ........................4
Tables
1-1. Recommended Lead Lengths ..................................................................1
4-1. Connections to Campbell Scientific Dataloggers....................................5
5-1. Wind Speed Multiplier ............................................................................6
5-2. Wiring for Example Programs ................................................................6
i
27106T Gill Propeller Anemometer
1. General Description
The 27106T Gill Propeller Anemometer sensor is used to measure vertical
wind speed. Wind speed is measured with a helicoid-shaped, four-blade
propeller. Rotation of the propeller produces an analog voltage signal
proportional to wind speed with polarity determined by the direction of the
wind.
The R.M. Young Instruction Manual includes additional information on the
operating principles, installation and maintenance of the sensor.
Lead length for the 27106T is specified when the sensor is ordered. Table 1-1
gives the recommended lead length for mounting the sensor at the top of the
tripod/tower with a 019ALU or CM200 series crossarm.
TABLE 1-1. Recommended Lead Lengths
CM6 CM10 CM110 CM115 CM120 UT10 UT20 UT30
10’ 13’ 13’ 19’ 24’ 13’ 24’ 34’
The 27106T ships with:
(1) ResourceCD
(1) 1180 Mount
2. Specifications
Range
Axial Flow: 0 to 90 mph (0 to 40 m/s)
All Angles: 0 to 80 mph (0 to 35 m/s)
Threshold Sensitivity*: 0.8 mph (0.4 m/s)
Distance Constant*: <6.9 feet (2.1 m)
Pitch: 11.8 inch (30.0 cm) air passage per
revolution
Signal Output: Analog DC Voltage proportional to axial
wind component. Polarity reverses with
reverse rotation.
1800 rpm (500 mV) = 9.0 m/s (20.1 mph)
Operating Temperature: -50° to +50°C
Propeller Description: 4-blade helicoids propeller molded of
carbon fiber thermoplastic
1
27106T Gill Propeller Anemometer
Dimensions
Overall Length: 17 inch (43 cm)
Propeller Diameter: 8 inch (20 cm)
Housing Diameter: 1 inch (2.5 cm)
1180 Mounting Pipe Description: 12-in. long, 3/4-in. IPS schedule 40 pipe
(1.05 in. OD)
Weight: 1.2 lbs (0.5 kg)
*Threshold and Distant Constant values are for axial flows.
Manufactured by RM Young (Traverse City, MI) and cabled by Campbell
Scientific for use with our dataloggers.
The black outer jacket of the cable is Santoprene® rubber. This
compound was chosen for its resistance to temperature extremes,
moisture, and 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.
NOTE
3. Installation
3.1 Unpack Equipment and Assemble the 27106T
Upon receipt of your shipment, immediately open the shipping carton and
ensure that you have all of the 27106T’s components.
The shipping carton should include:
x16” x 2” x 2” box labeled Propeller Anemometer
x9” x 9” x 2” box labeled Carbon Fiber Propeller
xCable (routed through the 1180 mounting pipe to mating connector)
x1180 Mounting Pipe
Make sure that you have removed everything (two boxes,
cable, and mounting pipe) from the shipping carton before
discarding the shipping foam and shipping carton. Foam
included with the shipping carton may conceal items. If an
item listed above is not initially visible, remove the foam
from the shipping carton and thoroughly inspect both sides
of the foam for the item. Immediately contact Campbell
Scientific if any item is missing.
CAUTION
2
27106T Gill Propeller Anemometer
Once everything has been retrieved from the shipping carton, assemble the
27106T by doing the following:
1. Remove the propeller shaft from the Propeller Anemometer box
2. Remove the propeller from the Carbon Fiber Propeller box
3. Remove the nut that is on the top of the propeller shaft
4. Place the propeller onto the top of the propeller shaft
5. Replace the nut and tighten to secure the propeller to the shaft
6. Remove the dust cap from the cable’s connector and attach the cable to the
anemometer’s connector
3.2 Mounting to Crossarm
Tools Required:
x5/32” Allen wrench for the NU-RAIL fitting or ½” open-end wrench for
CM220 Right Angle mount
xUV resistant cable ties
xsmall pair of diagonal-cutting pliers
x6” to 10” torpedo level
This anemometer can be mounted to a CM200-series crossarm or a 019ALU
crossarm. The 1180’s pipe that ships with the 27106 mounts to a CM200
series crossarm via the CM220 (Figure 3-1) or 1049 NU-RAIL Fitting (Figures
3-2) or to the 019ALU’s NU-RAIL fitting (Figure 3-2).
When mounting the sensor to the crossarm, care should be taken to ensure that
there are no obstacles, or sensors, that will interfere with the vertical air flow
from either the up or down direction.
Route the sensor cable along the underside of the crossarm to the tower/tripod
mast, and to the instrument enclosure. Secure the sensor cable to the crossarm
and mast using cable ties.
3
27106T Gill Propeller Anemometer
Mounting Pipe
FIGURE 3-1. 27106T Mounted to a Crossarm via the CM220
FIGURE 3-2. 27106T Mounted to a Crossarm via a NU-RAIL Fitting
N
U-RAIL
Fitting Crossarm
CM220
Crossarm
4
27106T Gill Propeller Anemometer
4. Wiring
Connections to Campbell Scientific dataloggers are given in Table 4-1. When
Short Cut for Windows software is used to create the datalogger program, the
sensor should be wired to the channels shown in the wiring diagram created by
Short Cut.
TABLE 4-1. Connections to Campbell Scientific Dataloggers
Color
Wire Label
CR800
CR850
CR5000
CR3000
CR1000
CR510
CR500
CR10(X)
21X,
CR7
CR23X
CR200(X)
White Signal SE Analog SE Analog SE Analog SE Analog
Black Signal Reference
G
Clear Shield
5. Programming
This section is for users who write their own programs. A datalogger program
to measure this sensor can be generated using Campbell Scientific’s Short Cut
Program Builder software. You do not need to read this section to use Short
Cut software.
In CRBasic, wind speed is measured by the VoltSE instruction. Dataloggers
that use CRBasic include the CR200(X) series, CR800, CR850, CR1000,
CR3000, CR5000, and CR9000(X).
In Edlog, wind speed is measured by the Volt (SE) (P1) instruction.
Dataloggers that use Edlog include the CR500, CR510, CR10(X), 21X,
CR23X, and CR7.
5.1 Wind Speed Multiplier and Offset
The expression for wind speed (U) is:
U = MX + B
Where,
M = multiplier
X = voltage measured by the datalogger
B = offset
Table 5-1 lists the multipliers to obtain miles/hour, meters/second, km/H, and
knots. The helicoid propeller has a calibration that passes through zero, so the
offset is zero.
5
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