Decatur Electronics SVR User Manual
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Decatur Electronics SVR User Manual

Surface velocity radar
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SURFACE VELOCITY RADAR (SVR)™ USER'S MANUAL
Certified ISO 9001
SURFACE VELOCITY RADAR (SVR)™
USER'S MANUAL
Decatur Electronics, Inc.
715 Bright Street
Decatur, IL 62522
USA/Canada 800.428.4315
Intl 217.428.4315
Fax 217.428.5302
www.decaturradar.com
Rev. 05/05
Copyright 2001-2005 Decatur Electronics, Inc.
1

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  • Page 1 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Certified ISO 9001 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Decatur Electronics, Inc. 715 Bright Street Decatur, IL 62522 USA/Canada 800.428.4315 Intl 217.428.4315 Fax 217.428.5302 www.decaturradar.com Rev. 05/05 Copyright 2001-2005 Decatur Electronics, Inc.
  • Page 2 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL...
  • Page 3 We urge you to study this manual before using the SVR, so you can maximize the benefits of this sophisticated radar device. If you are as pleased with its performance as we think you will be, ask your Decatur sales representative about our other products.

  • Page 4: Table Of Contents

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL TABLE OF CONTENTS ™ Fe a t u re s............
  • Page 5 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 5. Specifications ............26 5.1 Measurement Specifications ........26 5.2 Factory Default Settings ........26 5.3 Antenna Parameters ......... 26 5.4 Voltages ..............27 5.5 Power Consumption Parameters ......27 Legal Requirements ............ 28 6.1 FCC Document ..........

  • Page 6: Svr Features

    10° from the parallel alignment of the gun to the target. The SVR also features a data communications port, so it is possible to connect the gun to external devices such as a PC.

  • Page 7: About This Manual

    Please read it carefully. indicates a helpful tip or precaution to note. 1. Quick Start 1.1 Initial Set Up The SVR is easy to use. To operate, simply • charge and insert the batteries • power up •...

  • Page 8: Power

    The radar gun continues to operate in the background while it is in Menu Mode. The SVR exits Menu Mode and returns to the main operating mode if, after 6 seconds, you do not press the MODE or SELECT button.
  • Page 9 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Figure 1.3a The mode for backlight, on, and off Display Function Cosine correction angle for the horizontal (yaw) angle (the valid range is 0° to 60° in increments of 5°) Figure 1.3b The mode for selecting the horizontal (yaw) angle...
  • Page 10 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Display Function Vertical Angle Display. This is used to verify that the SVR is reading vertical angle correctly. The vertical angle may be calibrated first putting the gun in a level position, then pressing the Mode and Power buttons simultaneously for two seconds.

  • Page 11: Measuring Surface Velocity

    Up position the measurement will be locked and displayed. WARNING Do not put the radar gun in the water. This will damage it. The SVR measures the water surface only from outside the water. Figure 1.4a The SVR displaying a 2.4 f/s...
  • Page 12 If the user pulls the trigger OFF at any time, the display reads the average of all measurements up to that point. For example, “52.3” means SVR calculated a velocity of 2.3m/s over a period of 35 seconds. If there are fluctuations of more than 0.5 to 0.8 f/s (0.15 to 0.24 m/s) during a measurement interval, it is advised to review the final value.

  • Page 13: Angle Compensation

    Because the SVR measures the Doppler effect from the water surface, the SVR requires a certain amount of return energy. (See section 3.1 How Radar Works.) Particulate material and/or floating debris (seeding) on the surface and surface water roughness provide this effect.

  • Page 14: Vertical Angle Compensation

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL The vertical angle of the SVR may be recalibrated at any time by leveling the gun and pressing the “mode” and “power” buttons at the same time for more than one second.  Press the “mode” button slightly before the “power”...

  • Page 15: Horizontal Angle Compensation

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL The SVR indicates when the pitch-down angle exceeds 60° by displaying “– – –”. While “– – –” appears in the display window, the radar gun does not record velocity measurements. To continue taking water surface velocity velocity measurements, tilt the gun to an angle less than 60°...
  • Page 16 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Figure 1.5.2a When the radar gun is not parallel with the target (the flow of the water) the positioning creates a horizontal (yaw) angle. To set the horizontal angle compensation option, press the MODE button until an A appears in the display.

  • Page 17: Components

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 2. Components The SVR surface velocity measurement radar gun is extremely durable and has an easy-grip Black and Decker designed handle. The gun uses rechargeable Ni-Cad batteries, which are conveniently available at hardware stores and Decatur Electronics.
  • Page 18 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Figure 2.1 The display indicating low batteries • When the radar is transmitting, the SVR consumes roughly three times as much power from a battery than when it is not transmitting. Keep this in mind to maximize the battery life.

  • Page 19: Removing Batteries

    An activated serial communications port and 20-foot custom RS232 communications cable (part number S769-100) is available for ordering for recording and analyzing velocity data. With the port, connection of the SVR to external devices, such as a PC, is possible.

  • Page 20: Performance Tips

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 3. Performance Tips Understanding potential radar interference and what you can do when it occurs can greatly increase the radar gun’s performance. 3.1 How Radar Works Determining a velocity begins with the radar gun transmitting and directing a beam of microwave energy (radio waves) at an approaching (or receding) target.

  • Page 21: Interference Sources And Remedies

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL When you point the SVR about 10 feet from the water surface, it measures an elliptical beam pattern of 2 feet in diameter. Keep this in mind when making measurements of a stream width. Take several readings to completely cover the full width of the stream.
  • Page 22 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Figure 3.2.1 An angular error occurs when the target’s path is not parallel to the radar antenna. The horizontal (yaw) angle creates the cosine error effect. Small angles (less than 10°) have little effect on accuracy. As the angle increases, the displayed target velocity erroneously decreases, as the following table, Table 3.2.1, shows.

  • Page 23: Electromagnetic Interference (Emi)

    3.2.5 Scanning The SVR is designed for use while attached to a solid mount or hand held in a steady position. Moving or “scanning” the antenna past stationary objects can cause the system to detect motion.

  • Page 24: Environmental Factors: Wind, Rain, & Snow

    In wind, position the SVR toward a target area where wind does not affect or minimally disturbs the water surface, such as under a bridge or in a sheltered area.

  • Page 25: Care, Cleaning, And Storage

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 4. Care, Cleaning, and Storage • Avoid spilling food, beverages, and other liquids and substances on the radar device. • When you are not using or transporting the device, store it in its original packaging. • To clean the radar device, use a soft clean cloth, which is free of cleaning solutions.

  • Page 26: Specifications

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 5. Specifications 5.1 Measurement Specifications Units of measure are set by the factory in feet per second (f/s) or meters per second (m/s). Minimum velocity 1 f/s (0.3 m/s) Maximum velocity 30 f/s (9.1 m/s)

  • Page 27: Voltages

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 5.4 Voltages Supply voltage range 6.2VDC – 8.0VDC Power supplied from replaceable Ni-Cad batteries Low voltage threshold 6.2VDC 5.5 Power Consumption Parameters All currents measured at 7.2VDC with backlight on. Standby (antenna off ) .180 ampres...

  • Page 28: Legal Requirements

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 6. Legal Requirements 6.1 FCC Document FEDERAL COMMUNICATIONS COMMISSION WASHINGTON, D.C. 20554 GRANT OF EQUIPMENT AUTHORIZATION Certification Decatur Electronics Inc Date of Grant: 02/28/2000 715 Bright Street Decatur, IL 62522...

  • Page 29: Frequently Asked Questions (Faq)

    I took a reading. A. If the water surface is smooth with very little or no roughness, the SVR is possibly not receiving enough returning radar energy from it. Try to make your measurement closer to the water or in a region where some water surface turbulence, roughness, or even floating material is on the water.
  • Page 30 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Q. I am trying to make a velocity measurement that appears to be lower than 2 f/s (.60 m/s), but my readings show a higher velocity. A. Check for wind effect occurring on the water surface. Wind can affect the measurement of low velocities, for example below 2 f/s (.60 m/s).
  • Page 31 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Q. When I make measurements, the readings seem to change from high to low velocities to high velocities, etc. A. Make sure you hold the gun steady when you take a measurement. The tilt sensor that compensates for vertical (pitch-down) cosine error in velocity is very sensitive.
  • Page 32 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Q. From standing on a bridge, how do I measure an entire stream width? A. To obtain an average velocity of the full width of a stream, you first need to estimate the distance between the radar gun and the water surface.
  • Page 33 Q . What if I drop my gun? A. The SVR is extremely durable, and the Black & Decker designed handle gives it a comfortable grip that is easy to grasp. If you drop it, simply reload the batteries, power up, and try it. If the gun does not appear to work properly, contact Decatur Electronics.
  • Page 34 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Decatur also sells sports radar guns designed specifically for baseball and softball that are marketed exclusively through the JUGS Company. For more information, phone 800.547.6843, www.thejugscompany.com.

  • Page 35: Service

    8. Service 8.1 Warranty TWO-YEAR RADAR WARRANTY Decatur Electronics, Inc. guarantees that the SVR is free of defects in workmanship and materials and that it will operate within specifications for a period of two years. During this period, Decatur Electronics will repair or replace, at its option, any component,...

  • Page 36: Service Return Procedure

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 8.2 Service Return Procedure If your SVR has a problem, first see section 8 Frequently Asked Questions (FAQ). If the problem persists, contact our customer service hotline at 302.995.1976. Our customer service staff will try to solve the problem over the phone.

  • Page 37: Maintenance And Repair Record

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL 8.3 Maintenance and Repair Record Date of Maintenance or Repair What Was Done By Whom...

  • Page 38: How To Order Additional Products

    9. How to Order Additional Products You can purchase other Decatur Electronics radar products or additional parts for your SVR, such as a molded holster, a pole mount bracket, or a tripod-mounting adapter. For product descriptions and to order products, see the Decatur Electronics Web site at www.decaturradar.

  • Page 39: User Notes

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL User Notes...

  • Page 40: Index

    SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL Index interference sources and remedies angle compensation 6, 9, 13-15, 21-24 21, 30 antenna 20, 26-27 legal requirements 28 batteries 6, 7, 17-19, 31-32, 34 maintenance 35-37 bAT 16-18...
  • Page 41 SURFACE VELOCITY RADAR (SVR)™ USER’S MANUAL scanning SELECT button 8, 13, 16 service 35 snow 24 specifications 26-27 spurious speed readings 13-16, 21-24, 29 standard package 6 stationary-only gun 33 storage 25 surface roughness 11-12, 24, 29, 30 surface velocity 10-12, 29, 30...

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