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User’s Guide
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omega.com
e-mail: [email protected]
For latest product manuals:
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WT-3115
Benchtop Closed Loop
Wind Tunnel with Controller
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Servicing North America:
U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047
ISO 9001 Certified Stamford, CT 06907-0047 USA
Canada: 976 Bergar
Laval (Quebec), Canada H7L 5A1
Toll-Free: 1-800-826-6342 TEL: (514) 856-6928
FAX: (514) 856-6886 e-mail: [email protected]
For immediate technical or application assistance:
U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA
®
Customer Service: 1-800-622-2378/1-800-622-BEST
®
Engineering Service: 1-800-872-9436/1-800-USA-WHEN
®
Mexico: En Español: 001 (203) 359-7803 FAX: (001) 203-359-7807
Servicing Europe:
Benelux: Managed by the United Kingdom Office
Czech Republic: Frystatska 184
733 01 Karviná, Czech Republic
Toll-Free: 0800-1-66342 TEL: +420-59-6311899
FAX: +420-59-6311114 e-mail: [email protected]
France: Managed by the United Kingdom Office
Toll-Free: 0800 466 342 TEL: +33 (0) 161 37 29 00
FAX: +33 (0) 130 57 54 27 e-mail: [email protected]
Germany/Austria: Daimlerstrasse 26
D-75392 Deckenpfronn, Germany
Toll-Free: 0 800 6397678 TEL: +49 (0) 7059 9398-0
FAX: +49 (0) 7056 9398-29 e-mail: [email protected]
United Kingdom: OMEGA Engineering Ltd.
ISO 9001 Certified One Omega Drive, River Bend Technology Centre, Northbank
Irlam, Manchester M44 5BD England
Toll-Free: 0800-488-488 TEL: +44 (0)161 777-6611
FAX: +44 (0)161 777-6622 e-mail: [email protected]
OMEGAnet®Online Service Internet e-mail
omega.com [email protected]
It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
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.
WARNING: These products are not designed for use in, and should not be used for, human applications.
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ITEM
SPECIFICATION
EXPLANATION
Overall length
86.9" (220.8 cm)
Overall width
19.4" (49.3 cm)
Overall height
34” (86.5 cm)
Test section length
30.5” (77.6 cm)
Test section width
10.2” (26.0 cm)
Test section height
4.55” (11.6 cm)
Flow range
Up to 1000 ft/min (5.0
m/s)
Temperature range
Up to 80 oC
Fuse
Main AC fuse = 30 Amp
Blower fuse = 3 Amp
Electronic fuse = 1 Amp
SYSTEM CHARACTERISTICS
The WT-3115 is a unique closed loop wind tunnel for thermal characterization of components,
boards and heat sinks. The unit is made of Aluminum, sheetmetal and LEXANTM and produces
flows up to 1000 ft/min (5 m/s) and temperature up to 80 oC. The general characteristics of the
WT-3115 are shown in the table below.
The WT-3115 test section can be accessed from the top door and sides for mounting of the
boards. A unique internal rail guides provide mechanisms for installation of test specimen of
different sizes (e.g., PCB, heat sink). Instrument ports are provided throughout the test section
(on the front and side-walls) for placement of temperature, velocity and pressure sensors.
Sensors to measure the flow parameters are also supplied by Omega as optional accessories.
The tunnel is equipped with an Ebm Papst EC gas blower model # G1G170AB0520 (115 VAC).
The blower is also equipped with a PWM card that can be controlled with a 0-10 VDC input
signal. Models with 220 VAC are available upon request.
A wind tunnel controller can also be supplied by Omega for controlling the flow and temperature
automatically.
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The WT-3115 can be used for the following applications:
SYSTEM COMPONENTS
Heat Sink Testing- Characterize a variety of heat sink sizes for natural and forced
convection cooling.
Heat Sink Comparison- Test two heat sinks side by side and compare their thermal
performance in the same environment.
Component Testing- Test vehicle for component characterization.
PCB Testing- Test actual or simulated PCBs for thermal and flow distribution.
Flow Visualization- Observe flow distribution when a PCB or test object is placed in the
tunnel by smoke or buoyant bubbles through the all Lexan™ test section.
Variable Speed- Change the flow rate by controlling the fan RPM.
Quick Access- Quickly change the test specimen through the top panel.
Sensor Port- Measure pressure, velocity and temperature through the ports at the entrance
and exhaust of the test section.
The numbers identified in Figure 1 show the system components of the WT-3115 system.
These numbers are described below:
1. Test Section
2. Instrument ports
3. Blower
4. Diffuser section
5. Nozzle section
6. Settling Chamber
7. Controller and software (optional)
8. Test section top cover panel
9. Stands
10. Heater section
11. Heater Power Plug
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Figure 1: The WT-3115 and the Controller System Components
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SYSTEM OPERATION
1. Release the clamps on top panel to have access to the test section.
2. Mount your specimen (e.g., component, PCB or heat sink) in the test section.
3. Clamp the door back on the WT-3115.
4. Place flow measurement instrument in the instrument port. Place the velocity sensor and
the thermocouple in the test section. Place the sensor and the thermocouple very close
to each other, since the velocity sensor needs the temperature values to calculate the
velocity. Wind tunnel will be controlled based on the local temperature and velocity
values at the sensor locations.
5. Connect the blower cables (power cable and control cable) to the controller box.
6. Connect the heater wires to the control box.
7. Turn on the controller.
8. Set the velocity range and temperature on the controller and run the software. The
controller will automatically measure and control the air velocity and temperature. It can
also save the temperature and velocity data on the PC.
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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.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR WARRANTY
RETURNS, please have the
following information available BEFORE
contacting OMEGA:
1. Purchase Order number under which the product
was PURCHASED,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product.
FOR NON-WARRANTY REPAIRS,
consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2009 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
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Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA…Of Course!
Shop online at omega.com
SM
TEMPERATURE
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Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
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Wire: Thermocouple, RTD & Thermistor
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Calibrators & Ice Point References
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Recorders, Controllers & Process Monitors
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Infrared Pyrometers
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Heating Cable
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pH, Conductivity & Dissolved Oxygen Instruments
M-5352/0913
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