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Summary of Contents for Alnor RVA+
- Page 1 OWNER’S MANUAL Model RVA+ Rotating Vane Anemometer...
- Page 2 LIMITATION OF WARRANTY AND LIABILITY Seller warrants that this product, under normal use and service as described in the operator's manual, shall be free from defects in workmanship and material for a period of 24 months, or the length of time specified in operator's manual, from the date of shipment to the customer.
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Page 3: Table Of Contents
TABLE OF CONTENTS SECTION 1 General Description ....2 SECTION 2 Safety ......... 3 SECTION 3 About the RVA+......3 Installing the Batteries ......3 LCD display ..........4 Auto Shut Off ........... 4 SECTION 4 Detailed Operation ....4 English/Metric Unit Selection .... -
Page 4: Section 1 General Description
SECTION 1 General Description The RVA+ is intended for measurement of air velocity and volume flow at return grilles, fume hoods, kitchen exhausts etc. It uses rotating vane anemometer technology. Air movement causes rotation of a multi-blade fan mounted in low-friction bearings. -
Page 5: Section 2 Safety
SECTION 2 Safety Observe common sense safety precautions when using the RVA+. Exercise care to ensure that the instrument does not interfere with any moving equipment or electrical wiring This instrument is not designed for gas mixtures other than air. Use with explosive and/or other dangerous gas mixtures is not recommended and is at the user’s own risk. -
Page 6: Lcd Display
LCD display The large four digits will display the velocity or volume reading. The smaller digits near the upper left corner will always display temperature. There are a total of 13 arrow indicators, seven along the top of the display and six along the bottom of the display. -
Page 7: English/Metric Unit Selection
"rdY" indicating it is ready to take a measurement. The RVA+ powers up to the unit of measure used last. English/Metric Unit Selection To select between English and metric units, be sure that the display indicates "rdY". Press and hold the ▼ key for approximately five seconds. The display will show "EnG"... -
Page 8: Measuring Air Volume
To take a single reading, press READ key momentarily. The instrument will beep and the measured value will be displayed. To take a time averaged reading, press and hold READ key for the desired time period. The instrument will beep approximately every second. -
Page 9: Low Battery Indication
key to enter a new value. Press MODE/CLEAR key to accept the value and return to "rdY". To take a volume measurement, use the READ key as you would when taking a velocity measurement. The area value must be in either ft for English units or m for metric units. -
Page 10: Section 5 Helpful Information In Using Rotating Vane Anemometers
SECTION 5 Helpful Information in Using Rotating Vane Anemometers When used in airstreams of similar size to or smaller than the RVA+ head, blockage effects may occur. Velocity readings should be considered a relative measurement in this case. This effect is somewhat variable depending on the size of the airway and the distance from the duct walls. -
Page 11: Use On Grilles
Use on Grilles Better measuring conditions can be obtained on grilles with adjustable direction vanes if the vanes on the grilles are temporarily straightened before making measurements. This should not significantly affect the flow rate as long as any built in dampers are not accidentally disturbed. It is advisable to use the aperture (the actual effective area of air flow), not the surface area of the grill, in any flow rate calculation. -
Page 12: Calculating Volume Flow Rate
Calculating Volume Flow Rate Volume flow rates through airways or apertures may be calculated if the cross-sectional area of the airstream and its average velocity are known. To arrive at volume flow rate, the cross- sectional area of the airstream is multiplied by the average airstream velocity, using the same units of linear measurement throughout the calculation. -
Page 13: Section 6 Care And Maintenance
The procedure is the same when working in metric units, but the velocity readings will be in m/s. The opening area should be calculated in , and the answer will be in m EXAMPLE: A rectangular opening measures 600 x 400 mm (0.6 x 0.4 m) and twelve readings of velocity have been taken. -
Page 14: Section 7 Service And Calibration Information
• Do not immerse in liquids. • Do not drop the instrument. • Use carrying case for storage, transport, and protection from dust. • Use a clean damp cloth to wipe the instrument case. Do not wipe the blades. Return the RVA+ for service in case the instrument was dropped, blades were deformed, or liquid spilled on the instrument, the blades in particular. -
Page 15: Damaged In Transit
Material Authorization (RMA) number, and shipping instructions. Send the instrument prepaid. Securely package your instrument in a strong container surrounded by at least two inches (5 cm) of suitable shock-absorbing material. Mark the outside of the shipping container with the RMA number. - Page 16 be filed by the insured. If the instrument is damaged beyond use, a new order should be placed with TSI while awaiting reimbursement from the carrier for the damaged instrument. Call TSI directly for assistance if necessary.
- Page 17 MODEL RVA+ SPECIFICATIONS (subject to change without notice) Measurement Range: Velocity 50 - 6000 fpm (0.25 - 30 m/s) 0.57 - 68 mph (0.9 - 110 km/h) Temperature 32 - 140 °F (0 - 60 °C ) Displayed Volumetric Flow Rate: 4 - 5400 x 1000 cfm (1.9 - 2548 x 1000 l/s;...
- Page 18 _____________________________________________ Incorporated Alnor Products 500 Cardigan Road Shoreview, MN 55126 USA Toll Free (800) 424-7427 June 2002 Telephone (651) 490-2811 Printed in USA Fax (651) 490-3824 Part No. 116-159-210 Rev. 2 Copyright 2002 www.alnor.com customerservice@alnor.com TSI Incorporated...