Related Manuals for DwyerOmega OMEGA WT4401-S
Summary of Contents for DwyerOmega OMEGA WT4401-S
- Page 1 USER’S GUIDE WT4401-S & WT4401-D Benchtop Wind Tunnels omega.com | info@omega.com For latest product manuals: omega.com/en-us/pdf-manuals...
- Page 2 CONTACT Omega Engineering, Inc. omega.com/contact-us Toll-Free: 1-800-826-6342 (USA & Canada only) Customer Service: 1-800-622-2378 (USA & Canada only) Engineering Service: 1-800-872-9436 (USA & Canada only) Telephone: (203) 359-1660 Fax: (203) 359-7700 Email: info@omega.com For other locations visit: omega.com/worldwide The information contained in this document is believed to be correct, but Omega accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.
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Page 3: Table Of Contents
Table of Contents Introduction ..................................4 1.1. Product Description ................................4 1.2. Unpacking ....................................5 Setting Up the Wind Tunnel ............................6 2.1. Precautions ..................................... 6 2.2. Setup Procedure ................................... 6 Installing the Wind Tunnel ...............................10 Operating Instructions ...............................12 Calibrating at Other Flow Rates Not Listed in the Calibration Sheets ...............13 Specifications ..................................14 In Case of Problems ................................15 Maintenance ..................................15... -
Page 4: Introduction
Introduction 1.1. Product Description The WT4401-S and WT4401-D wind tunnels are designed to give a uniform flow rate over a 101.6 mm x 101.6 mm (4 in x 4 in) test cross section. A powerful 12 A motor varying from 0 RPM to 10,000 RPM is adjusted to give a particular flow rate by a precision motor control unit. -
Page 5: Unpacking
• Highly accurate to 1% of reading • Large 101.6 mm x 101.6 mm (4 in x 4 in) test chamber • Highly stable delta pressure sensor and readout(s) included with each wind tunnel • Optional environmental monitoring package of temperature, humidity, barometric pressure and delta pressure available 1.2. -
Page 6: Setting Up The Wind Tunnel
Setting Up the Wind Tunnel 2.1. Precautions A wind tunnel’s performance can be severely diminished if not used with the following considerations in mind. • Do not use the wind tunnel in small rooms with less than 1,800 cubic feet. The air flow creates currents that undermine the wind tunnel’s accuracy. - Page 7 Figure 4: Restrictive Plate Placement Figure 5: Air Flow Setting Up the Wind Tunnel...
- Page 8 TARE SETPTS /MAX /MIN MENU RESET + – HIGH 115 VAC Figure 6: Standard Electronics Box; Top (Front); Bottom (Rear) The TARE button on the front of the electronics box is used to zero out the meter. The ON/OFF power button is to its right. The REC connector is used to hook up any device with 10 V dc analog output.
- Page 9 TEMPERATURE HUMIDITY WT4401-D ZERO BAROMETRIC PRESSURE DIFFERENTIAL PRESSURE DIFFERENTIAL PRESSURE POWE HIGH CAUTION: FOR CONTINUED PROTECTION AGAINS THE RISK OF FIRE REPLACE WITH ONLY THE SAME TYPE, RATING AND SIZE OF FUSE. DISCONNECT POWER FROM SOURCE BEFORE CHANGING FUSE. MADE IN THE U.S.A. MODEL NO: WT4401-D SERIAL NO:...
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Page 10: Installing The Wind Tunnel
Installing the Wind Tunnel Follow the instructions below to install the wind tunnel. Step 1: After unpacking the box, place the wind tunnel on a level table top. Refer to Section 2 on how to select the correct size room and how to orient the wind tunnel correctly in the room. Step 2: Set up the motor controller. - Page 11 Step 4: Using the compressing fittings provided, mount the probe to be calibrated in the wind tunnel. Refer to Figure 9. Some probes have directional air flow for upstream and downstream sides. Make sure the probe is installed without any leaks. Step 5: Continue to Section 4 Operating Instructions.
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Page 12: Operating Instructions
Operating Instructions Important Always keep your original calibration reports in good, clean condition for future copying. Make duplicate copies of the calibration reports you desire. The differential pressures recorded in column 2 are at lab conditions (∆Ps). Standard conditions are at 21.1 °C (70 °F) and 29.92 in Hg. -
Page 13: Calibrating At Other Flow Rates Not Listed In The Calibration Sheets
Calibrating at Other Flow Rates Not Listed in the Calibration Sheets To determine the ∆P that corresponds to the desired flow rate use the following formula: where: P1 is the delta P corresponding to velocity 1 P2 is the delta P corresponding to velocity 2 V1 is a known velocity from the Calibration tables V2 is a desired velocity not listed in the Calibration tables Sometimes a given delta P is observed and you would like to know what flow rate it corresponds to (use the... -
Page 14: Specifications
Specifications Wind Tunnel Accuracy: 1 % reading (2 % rdg with restrictive plates) Flow Rates: 0.15 m/s to 45 m/s (25 f/m to 9000 f/m) Dimensions: Refer to Figure 6-1 Weight Wind Tunnel: 22.45 kg (49.5 lb) Standard Electronics: 3.18 kg (7 lb) Deluxe Electronics: 6.94 kg (15.3 lb) Restrictive Plates A &... -
Page 15: In Case Of Problems
In Case of Problems Problem Solution Scraping noise from area of fan Realign position of the fan • Be sure the motor control-motor connector pieces are connected to each other. • Make sure the motor controller is plugged in and The wind tunnel is not on -no power to motor connected to a live outlet. -
Page 16: Spare Parts And Replacement Parts
Spare Parts and Replacement Parts Description Part Number Restrictive Plate Cover WT-0011 Restrictive Plate A WT-0012 Restrictive Plate B WT-0013 Restrictive Plate Gasket WT-0014 Honeycomb Flow Straightener WT-0022 Thumb Screw for Restrictive Plate Cover (Assembly) WT-0060 One Piece of 1.5 m (5-ft) Silicone Tubing KCC-0132 Benchtop Wind Tunnel... -
Page 17: Appendix A: Differential Pressure Fluctuation Errors
Appendix A: Differential Pressure Fluctuation Errors Achieving the exact desired pressure measurement at high delta pressures is sometimes a tough thing to do. The fluctuations, although appearing to be large, are actually quite small. The table on the next page shows the delta pressure corresponding to a 1 % change in air flow velocity. - Page 18 TYPICAL WIND TUNNEL DATA (ENGLISH UNITS - FPM) RESTRICTIVE PLATE A RESTRICTIVE PLATE B NO PLATE Standard Tol. on Standard Tol. on Standard Tol. on Velocity Ps Press. Velocity Ps Press. Velocity Ps Press. mm Hg 2% Vel mm Hg 2% Vel mm Hg 1% Vel...
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Page 19: Appendix B: Barometric Pressure Calculations
11. Appendix B: Barometric Pressure Calculations Barometric pressure will affect the air density which influences the velocity readings. The deluxe electronics box will give the barometric pressure reading directly to you. If you do not have a barometer and wish to correct for the barometric pressure, an airport or a local weather station can provide a standard barometric reading. - Page 20 Differential Pressures vs Airspeed at Standard Conditions of 70°F (21.1°C) and 29.92 in Hg. mmHg mmHg 2.46427 4600 23.37 0.00116 0.51 2.57257 4700 23.87 0.00466 1.02 2.68321 4800 24.38 0.01048 1.52 2.79617 4900 24.89 0.01863 2.03 2.91147 5000 25.4 0.02911 2.54 3.02909 5100...
- Page 21 WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.
- Page 22 omega.com M-1776/0624 Improving the world, one measurement at a time. UNIVERSAL FLOW MONITORS...
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