TSI Instruments ALNOR Velometer 6000 Series Owner's Manual
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TSI Instruments ALNOR Velometer 6000 Series Owner's Manual

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OWNER'S MANUAL
Velometer
®
Series 6000
®
A
T S I
®
C o m p a n y

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Summary of Contents for TSI Instruments ALNOR Velometer 6000 Series

  • Page 1 OWNER’S MANUAL Velometer ® Series 6000 ® T S I ® C o m p a n y...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Using the Velometer Safely General Description Meter Range Selector Pitot Probe Lo-Flow Probe Diffuser Probe Static Pressure Probe Preparation for Use Diffuser Probe Static Pressure Probe Pitot Probe Lo-Flow Probe Operation Procedure for Measuring Velocity with Lo-Flow Probe 10 Velocities at Suction Openings—Except Diffusers or Grilles At Grinding or Buffing Wheels...

  • Page 3: Using The Velometer Safely

    USING THE VELOMETER SAFELY All necessary precautions must be observed when operating the Velometer in the vicinity of moving equipment such as motors and blowers. The user must exercise care to ensure that the probe or the instrument does not in- terfere with any moving equipment.

  • Page 4: General Description

    GENERAL DESCRIPTION The Alnor Velometer is a direct reading instrument for measuring air ve- locities. It is designed to measure velocities inside heating and ventilating ducts, or in open areas such as at fume hoods, grilles, diffusers, slots on ventilated plating tanks, and so forth. It may also be used for measuring duct static pressures.

  • Page 5: Range Selector

    Range Selector The Range Selector (A) allows you to switch to one of two velocity ranges or a static pressure range by means of a switch plate (B). A switch button (C) is provided for changing the Velometer from use with a Pitot Probe to use with either a Diffuser Probe or a Static Pressure Probe.

  • Page 6: Pitot Probe

    The Range Selector with the black lettering has the following ranges: Velocity: 0 to 1250 feet per minute 0 to 2500 feet per minute Static Pressure: 0 to 1 inches of water (6000AP set) The Range Selector with red lettering has the following ranges: Velocity: 0 to 5000 feet per minute 0 to 10,000 feet per minute...

  • Page 7: Diffuser Probe

    Diffuser Probe Velocity Sensing Port The Diffuser Probe is designed to measure the velocity at diffusers, regis- ters and grilles. The volume of air being supplied or exhausted can be deter- mined by multiplying the measured velocity times an air flow factor.* Refer to page 11 for proper diffuser, register and grille measuring procedures.

  • Page 8: Preparation For Use

    PREPARATION FOR USE Diffuser Probe Step 1: Remove sensing port caps. Diffuser Step 2: Connect two hoses (C) to sensing ports (B). Probe Step 3: Select proper Range Selector (D). Note: For velocities below 2500 feet per minute, use the Range Se- lector with black letters;...

  • Page 9: Static Pressure Probe

    Static Pressure Probe Step 1: Remove sensing port caps. Step 2: Connect two hoses (C) to sensing ports (D). Step 3: Select proper Range Selector (D). Static Pressure Note: For 0–1" static pressures, use Range Selector with black let- Probe ters;...

  • Page 10: Pitot Probe

    Pitot Probe Step 1: Remove sensing port caps. Step 2: Connect two hoses (C) to sensing ports (B). Step 3: Select proper Range Selector (D). Pitot Probe Note: For velocities below 2500 feet per minute, use the Range Se- lector with black letters; for velocities above 2500 feet per minute, use the Range Selector with red letters.

  • Page 11: Operation

    OPERATION After assembling the correct probe to the Velometer as shown on pages 7–9 you are ready to take the necessary measurements. Below are some typical applications and cautions when using the various probes. When using the Velometer for measuring air velocity at conditions other than .075 lbm/ft refer to the correction chart on page 19 for maximum accuracy.

  • Page 12: Procedure For Measuring Diffuser, Register And Grille Velocities With Diffuser Probe

    Procedure for Measuring Diffuser, Register and Grille Velocities with Diffuser Probe To calculate the air volume passing through a diffuser, register or grille outlet, measure the velocity at the outlet, applying the air flow factor that is provided by the outlet manufacturer, and use the following equation: Q = K x V Where English Units Metric Units...
  • Page 13 For maximum accuracy, observe the following precautions: 1. Use only the appropriate diffuser, register or grille manufacturer’s measuring procedures. 2. Make a complete and accurate velocity reading. 3. Record the velocity measurements on a diffuser air balanc- ing worksheet as shown. AIR BALANCING—DIFFUSER READINGS 4.

  • Page 14: Procedure For Measuring Static Pressure

    Procedure for Measuring Static Pressure 1. Select the location for the static pressure reading and drill a 1/4" hole. You may wish to paint a circle around the hole and number it for future convenience. 2. Assemble the Velometer for positive (or negative) readings as described above.

  • Page 15: Determining Cross-Section Areas

    Determining Cross-Section Areas The cross-section of the duct is based on the actual inside duct area through which air flows. If the duct is internally lined with insulation, the thick- ness of that insulation must be taken into consideration when calculating the duct area.
  • Page 16 In round ducts, take velocity readings at the center of equal concentric areas; take at least 20 readings along two diameters. In square or rectangular ducts, take a minimum of 16 and a maximum of 64 readings at centers of equal areas.

  • Page 17: Troubleshooting And Maintenance

    TROUBLESHOOTING AND MAINTENANCE Troubleshooting Guide Problem Correction 1. Velometer not adjusted. See zero adjust- Velometer not at zero ment method, page 3. (before use). 2. Assembled probe and meter accidentally reading pressure or aiflow. Check adjust- ment with caps on sensing ports. 3.

  • Page 18: Maintenance

    Maintenance General Alnor Velometers require very little service except for replacement of O-ring gaskets and cleaning or replacing the filter elements in the Range Selectors. If any difficulties in the operation of the Velometer should de- velop, please contact Alnor Instrument Company. Do not return any in- struments without written authorization from Alnor Instrument Company.

  • Page 19: Replacement Of O-Rings In Probes

    Withdraw the filter Part Number 321-012-005. Carefully clean the filter element by means of a brush or vacuum cleaner, or wash it in luke-warm water with grit-free soap. In case the filter element is damaged, replace it. Before reassembling the Range Selector, carefully clean all parts. To install the cleaned or replacement filter, slip the bore of the filter over the protruding nipple portion of the lower Range Selector part.

  • Page 20: Service Information

    SERVICE INFORMATION Contact Alnor Instrument Company before returning your Alnor Instrument to the factory. See Instructions For Return. Follow the procedure carefully as it will expedite processing. Failure to follow the procedure will/may cause return of unit unrepaired. Send your instrument to the factory transportation prepaid.

  • Page 21: Instructions For Return

    INSTRUCTIONS FOR RETURN Damaged in Transit All orders are carefully packed for shipment. On receipt, if the shipping container appears to have been damaged during shipment, the instrument should be thoroughly inspected. The delivering carrier’s papers should be signed noting the apparent damage. DO NOT DISCARD THE BOX. If the instrument itself has been damaged, a claim should be promptly filed against the carrier by the customer.

  • Page 22: Ownership/Calibration Log

    OWNERSHIP/CALIBRATION LOG Equipment Log Date of Purchase ____________________________________________ Calibration Record ___________________________________________ 1. ________________ 2. ______________ 3. ________________ 4. ________________ 5. ______________ 6. ________________ 7. ________________ 8. ______________ 9. ________________ 10. ________________ 11. ______________ 12. ________________ Notes: _____________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________...
  • Page 23 WARRANTY Alnor Instrument Company (Alnor) warrants this product to be free of defects in material and workmanship for a period of two years from the date of original purchase. If the product should become defective during the warranty period, Alnor will repair it or elect to replace it free of charge under the following conditions: 1.

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