AN-2000 Computerized Anemometry System

       Introduction

An anemometer is an instrument for measuring fluid velocity, whether it be of gases or fluids, hot wire or hot film, anemometers measure fluid speed using a delicate probe made of thin tungsten/platinum wire, or a thin metallic film. This probe is heated to a temperature higher than average temperature of the fluid. Using sophisticated circuitry, the anemometer stabilizes and maintains the probe temperature at a constant level throughout the measurement. Since the fluid flowing past the probe has a lower temperature than the probe, the film/wire is constantly being cooled by the fluid flow. The higher the velocity, the faster the rate of cooling. Since the anemometer must maintain the probe temperature at a constant level, it is therefore sensitive to the rate at which it is being cooled, i.e., the fluid velocity. This velocity is translated to a continuously changing voltage which has a nonlinear relationship with the flowing fluid. This voltage then undergoes signal conditioning, to filter out noise and improve the Signal/Noise ratio. After proper calibration of the probe channels, it is possible to measure fluid velocities with an accuracy of 0.05% or greater, depending upon the measurement range and the quality of the calibration. The response time between measurement and instrument output is very short in comparison with other methods of fluid flow measurement and can reach a minimum of 1/2 microsecond. The AN-2000 Anemometry system measures at that speed up to 16 channels simultaneously!

       Outstanding Features

A user-friendly remote controlled anemometry system.
PC interface card, DOS and WINDOWS (3.1 & 95) software,LABVIEW
interface.
Automatic bridge balance, Automatic frequency compensation.
Built-in digital oscilloscope and data acquisition system.
Built-in artificial intelligence, for easy operation.
Built-in digital linearizer - outputs raw data in engineering units:
- No added noise,
- No drift, - Real-time data,
- 15 bit resolution. Automatic fast calibration
- using the CAL-2000 Digital Air-Speed Calibrator.
Temperature and Humidity recording for compensation.

       Advantages of the AN-2000

The AN-2000 can measure fluid velocities ranging from 0 to 150 m/sec, as well as supersonic measurements. In addition to these inherent qualities of the basic AN-2000 system, there are 14 extra options which can be added to any number of channels. These expand the capabilities of the system, allowing it to make professional-standard measurements in different kinds of fluids. Another advantage of the AN-2000 is its modularity: channels can be removed or interchanged without disturbing other channels already calibrated for different experiments. The AN-2000 is being used today at a large number of leading research institutes and universities throughout the world, where, for a number of years, it has proved its value as a reliable and accurate instrument, and has become a valuable research tool for scientists and engineers. Part of the AN-2000's success is due to its user-oriented design, making the system easy and straightforward to use by inexperienced students and professional researchers alike. We hope that you become part of this expanding group of satisfied AN-2000 users. Refer to the Technical Specification to find out about the outstanding capabilities and characteristics of the AN-2000. As a result of technological advances in design and production, A.A. Lab Systems can now offer you a complete AN-2000 anemometry system at a substantially lower price than in the past, making this highly reliable and accurate system highly affordable as well. Call or e-mail for any information you need that is not covered in this Web Site - our professional staff will be happy to answer any technical questions you may have.

       Description

State-of-the-art microprocessor architecture, based on a fast 80286 processor gives the AN-2000 the ability to perform high speed display and control operations as well as complicated floating-point calculations. Data acquisition is performed by a proprietary hardware designed for high reliability DMA transfers at high rates. The DMA/RS-232 is a high performance multi-function interface board, that combines high speed DMA interface, RS-232 serial communication and a fast display output port. It uses Direct-Memory-Access transfers combined with a 2 - 8 MegaBytes of FIFO buffer to achieve high speed data acquisition rates up to 3200 Kbytes/Sec. Fully compatible RS-232 port controls the operation of the instrument. The high-speed display port provides continuous on-line view of the AN-2000 display on your PC's screen. AN-2000 Interactive graphics user's software packaged is designed to have the look and feel of a physical instrument. Ready-to-go, easy to control menu options provide full control over the AN-2000 anemometry system, the DMA/RS-232 interface card and other data communication interfaces as well. AN-FLOW is a complete software system for data acquisition, instrument control, Digital Signal Processing, data analysis, graphing and data presentation. This menu-driven software has many powerful functions used for the analysis of anemometry signals as: Linearization of data, polynomial calculations, calibration of 1, 2 and 3 component probes, real-time display of acquired data, time-window display, FFT, Correlation, Histograms, averaging, turbulence intensity etc.

       Detailed Information

For more information regarding the AN-2000 capabilities and options, select (click) any of the subjects below:

Controls and Indicators
The Intelligence behind the Solution
System Configuration
CAL-2000 Digital Air-Speed Calibrator Software
HIGH Standards * HIGH Speed * Friendly
Analog Signals and Anemometers - what YOU should KNOW
SMARTWARE - the Breakthrough
Soft Start Circuit
Technical Specifications
Mainframe Dimensions
Options
Traverse

 


For more information please contact us:

Head Office: 33 Hayetzira St., Ramat-Gan 52521, ISRAEL.
Tel: 972-3-5756327, Fax: 972-3-5756326

U.S.A office: 3607 Silverside Rd., Wilmington, DE19810.
Tel: (302)478-2881, Fax: (302) 478-7956

E-mail:info@lab-systems.com

Copyright 2000, A.A.Lab Systems Ltd.