INSTRUCTION MANUAL Met One 034A-L Windset Revision: 7/97 C o p y r i g h t ( c ) 1 9 8 0 - 1 9 9 7 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 MET ONE 034A-L WINDSET 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.
034A-L 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 ........................................................................1 2. Specifications .............................................................1 3. Installation...................................................................1 3.1 Siting.........................................................................
034A-L Table of Contents A-2. Declination Angles East of True North Are Subtracted from 0 to Get True North......................................................................... A-2 A-3. Declination Angles West of True North Are Added to 0 to Get True North......................................................................... A-3 Table 5-1. Multipliers and Offsets for Wind Speed and Direction........................... 4 7-1.
MET ONE 034A-L WINDSET 1. GENERAL 3. INSTALLATION The Met One 034A-L Windset is an integrated cup anemometer and wind vane. The anemometer consists of three cups that sense the wind speed. These cups rotate on a vertical shaft that magnetically activates a sealed reed switch. The read switch opens and closes at a rate proportional to wind speed. The wind direction is sensed by a vane. The vane drives a 10 kΩ potentiometer. 2.
MET ONE 034A-L WINDSET Shoulder Screw Alignment Screw Bushing N 019ALU Crossarm 3/4 x 1 inch Nu-Rail FIGURE 3-1. 034A-L Mounted on a 019ALU Horizontal Crossarm. Attach the sensor cable to the six pin male connector on the 034A-L. Make sure the connector is properly keyed. Finger tighten the knurled ring. Route the sensor cable along the underside of the crossarm to the tripod/tower mast and down a tripod/tower leg to the instrument enclosure. Secure the cable to the crossarm and mast using cable ties.
MET ONE 034A-L WINDSET CONNECTOR PIN-OUT 3 4 2 6 5 1 PIN 1 - AZIMUTH SIGNAL PIN 2 - AZIMUTH REFERENCE PIN 3 - AZIMUTH EXCITATION PIN 4 - PULSE OUT PIN 5 - PULSE REFERENCE PIN 6 - SHIELD ADJUSTABLE RESISTANCE Datalogger CONNECTOR (PIN) 9.53K OHM 3 10K OHM AZIMUTH POTENTIOMETER E3 (Switch Excitation) GREEN SE5 or 3H (Single-Ended Analog Input) WHITE AG or BLUE 1K OHM 1 2 MAGNETICALLY ACTIVATED REED SWITCH 4 5 RED P2 BLACK G or CLEAR G or (Pulse Input 6 FIGURE 4-1.
MET ONE 034A-L WINDSET TABLE 5-1. Multipliers and Offsets for Wind Speed and Direction Units ms -1 mph degrees Datalogger type CR10(X) or 21X CR10(X) or 21X CR10(X) or 21X Instruction number 3 3 5 Multiplier Offset 0.7990 0.2811 1.789 .629 720 0 NOTE: 034A-L Windsets purchased directly from Met One Instruments have a different configuration on the 6 pin connector. In addition, they do not have the 10 kΩ resistor on the excitation line.
MET ONE 034A-L WINDSET 07: Real Time (P77) 1: 0110 Day,Hour/Minute 08: Wind Vector (P69) 1: 1 Reps 2: 0 Samples per Sub-Interval 3: 00 S, θu, & σ(θu) Polar** 4: 1* Wind Speed [ WndS_m_s ] 5: 2* Wind Direction [ WndD_deg ] -Input Locations1 WndS_m_s 2 WndD_deg EXAMPLE 2. Sample 21X Instructions ;{21X} ; *Table 1 Program 01: 10 01: Pulse (P3) 1: 1 2: 2* 3: 22 4: 1* 5: 0.7990 6: 0.
MET ONE 034A-L WINDSET 07: Real Time (P77) 1: 0110 Day,Hour/Minute 08: Wind Vector (P69) 1: 1 Reps 2: 0 Samples per Sub-Interval 3: 00 S, θu, & σ(θu) Polar** 4: 1* Wind Speed [ WndS_m_s ] 5: 2* Wind Direction [ WndD_deg ] -Input Locations1 WndS_m_s 2 WndD_deg * ** Proper entries will vary with program and datalogger channel and input location assignments. Average wind speed, average unit vector wind direction, standard deviation of unit vector wind direction 6.
MET ONE 034A-L WINDSET EXAMPLE 3. Sample CR10(X) Program when Long Leads are Required ;{CR10X} ; *Table 1 Program 01: 10 01: Pulse (P3) 1: 1 2: 2* 3: 22 4: 1* 5: 0.7990 6: 0.2811 Execution Interval (seconds) Reps Pulse Channel 2 Switch Closure, Output Hz Loc [ WndS_m_s ] Mult Offset ;Set the wind speed to zero if the wind is not blowing. ; 02: If (X<=>F) (P89) 1: 1* X Loc [ WndS_m_s ] 2: 1 = 3: 0.
MET ONE 034A-L WINDSET -Input Locations1 WndS_m_s 2 WndD_deg * ** *** Proper entries will vary with program and datalogger channel and input location assignments. On the 21X use the 5000 mV input range and the a 5000 mV excitation voltage. Average wind speed, average unit vector wind direction, standard deviation of unit vector wind direction 8.
MET ONE 034A-L WINDSET 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.
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