27106T Gill Propeller Anemometer Revision: 2/11 C o p y r i g h t © 1 9 8 4 - 2 0 1 1 C a m p b e l l S c i e n t i f i c , I n c .
Warranty and Assistance The 27106T GILL PROPELLER ANEMOMETER is warranted by Campbell Scientific, Inc. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. Campbell Scientific, Inc.'s obligation under this warranty is limited to repairing or replacing (at Campbell Scientific, Inc.'s option) defective products.
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.
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.
27106T Gill Propeller Anemometer Dimensions Overall Length: Propeller Diameter: Housing Diameter: 17 inch (43 cm) 8 inch (20 cm) 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. NOTE The black outer jacket of the cable is Santoprene® rubber.
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.
27106T Gill Propeller Anemometer Mounting Pipe CM220 Crossarm FIGURE 3-1. 27106T Mounted to a Crossarm via the CM220 NU-RAIL Fitting Crossarm FIGURE 3-2.
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.
27106T Gill Propeller Anemometer TABLE 5-1. Wind Speed Multiplier (With Configuration Code 21*) Unit Multiplier Miles per Hour 0.04025 Meters/Second 0.01800 Kilometers/Hour 0.06480 Knots 0.03496 *When the propeller is used for measuring the vertical wind component, users may want to apply an additional multiplier of 1.25 to the output signal. This may be done numerically in the data processing operations or electronically in the signal conditioning.
27106T Gill Propeller Anemometer 'Define Data Tables DataTable (Table1,True,-1) DataInterval (0,10,Min,10) Maximum (1,WS_ms,FP2,False,False) Minimum (1,WS_ms,FP2,0,False) Average (1,WS_ms,FP2,False) EndTable 'Main Program BeginProg Scan (1,Sec,1,0) Battery (Batt_Volt) '27106T Wind Speed Sensor measurement VoltSe (WS_ms,1,mV2500,1,1,0,250,0.01800,0) 'mV5000 range code for CR3000 and CR5000 dataloggers 'Call Output Tables CallTable Table1 NextScan EndProg 5.2.
27106T Gill Propeller Anemometer 6: Minimum (P74) 1: 1 Reps 2: 0 Value Only 3: 1 Loc [ WS_ms ] 7: Average (P71)^4771 1: 1 Reps 2: 1 Loc [ WS_ms ] 6. Sensor Maintenance Given proper care, the Gill Propeller Anemometer should provide years of service. Components are conservatively rated and require little maintenance. The only parts likely to need replacement due to normal wear are the precision ball bearings and the tach-generator.
27106T Gill Propeller Anemometer c) Loosen set screw on shaft collar/coupling disk and remove from propeller shaft. d) Slide propeller shaft through both bearings and out of housing. 2. e) Pull front bearing dust shield off housing. f) Using the edge of a pocket knife, gently pry front and rear bearings out of housing. INSTALL NEW BEARINGS a) Gently insert front bearing into housing. b) Push front bearing dust shield back onto housing.
27106T Gill Propeller Anemometer Replace the tach-generator as follows: 1. REMOVE OLD GENERATOR ASSEMBLY a) Remove propeller from anemometer. b) Unthread generator housing collar. Pull generator housing away from sensor connector and generator assembly. c) 2. Note position of generator wires on sensor connector pins. Unsolder wires from pins and remove old generator assembly. INSTALL NEW GENERATOR ASSEMBLY a) Solder wires from new generator assembly onto proper sensor connector pins.
27106T Gill Propeller Anemometer Drinkow, R., “A Solution to the Paired Gill-Anemometer Response Function”, Journal of Applied Meteorology, Vol 11, 1972, pp. 7-80. Hicks, B. B., “Propeller Anemometers as Sensors of Atmospheric Turbulence”, Boundary-Layer Meteorology, Vol 3, 1972, pp. 214-228 Fichtl, G. H., and Kumar, P., “The Response of Propeller Anemometer to Turbulent Flow with the Mean Wind Vector Perpendicular to the Axis of Rotation”, Boundary-Layer Meteorology, Vol 6, 1974, pp. 363-379.
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