TSI Instruments ALNOR AXD 530 Owner'S Manual Download Page 20 | Manualshive

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18

Method 3

You can use this method if you know the altitude above sea level and
the air temperature but are unable to determine the absolute pressure.
Using the AXD530 Density Correction Factors chart, find the
appropriate correction factor value. Multiply the displayed value by
the value in this chart to get the “corrected” value.

Equation 1:

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Summary of Contents for ALNOR AXD 530

Page 1: ...AXD 530 MicroManometer OWNER S MANUAL ...

Page 2: ...TIONS stated herein NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE THE EXCLUSIVE REMEDY OF THE USER OR PURCHASER AND THE LIMIT OF THE LIABILITY OF SELLER FOR ANY AND ALL LOSSES INJURIES OR DAMAGES IN CONNECTION WITH THIS PRODUCT INCLUDING CLAIMS BASED ON CONTRACT NEGLIGENCE STRICT LIABILITY OTHER TORT OR OTHERWISE SHALL BE THE RETURN OF THE PRODUC...

Page 3: ... Keypad 7 Key Functions 8 Using the AXD530 8 Basic Functions 8 To Change Units 8 Measurement Modes 9 Pressure Selection 9 Velocity Selection 9 Appendix A Traversing a Duct to Determine Average Air Velocity or Volume 10 Where to Take the Measurement 10 Traversing a Round Duct 10 Traversing a Square Duct 12 Notice of Disclaimer 13 Appendix B Pressure to Velocity Conversion Charts 13 Appendix C Maint...

Page 4: ... Density Correction Factors 19 For Different Altitudes and Temperatures 19 Appendix E Effects of Resolution on Accuracy Statement 19 Service Information 21 Instructions for Return 22 Service and Repair 22 Instructions for Return 22 Damaged in Transit 23 Ownership Calibration Log 24 Equipment Log 24 ...

Page 5: ...ce you will measure Optional hoses and Pitot static probes are available The AXD530 uses three 3 AA size alkaline batteries for low replacement cost Using the AXD530 Safely When using the instrument to check airflow in an elevated workplace make certain that you can safely raise and hold the instrument while making measurements This is especially important when you are working on a ladder Avoid ca...

Page 6: ...rew on the back of the instrument Slide the cover up and lift it out Install the batteries over the pull strap taking care to observe each battery s polarity Replace the cover and tighten the screws Note When the batteries become low the LCD will show LO BATT above the reading From that point you will have about one hour of normal use left If comes on continuously and replaces the reading the batt...

Page 7: ...m pressure Attaching the Optional Pitot Static Probe To attach the probe for measuring air velocity Remove the Pitot static probe and rubber tubing from their carrying case Remove the protective caps from the probe and save them for restoring the probe later Attach one section of flexible tubing to the probe s static pressure port and another to the probe s total pressure port Pitot static probe ...

Page 8: ...t unit of measurement will be displayed along with a measurement value followed by will appear The meter will begin to measure Zeroing the Instrument Before you begin taking measurements the AXD530 must be zeroed by following these steps Most hand held meters using differential pressure sensors require a warm up time Turn on your Alnor AXD530 a minimum of five 5 minutes before zeroing and taking y...

Page 9: ...mber of zeros after XX For example 12 664 is displayed as Modes The AXD530 operates and takes measurements in the RUN mode You may be in the RUN ZERO or UNIT select modes AXD530 Keypad The AXD530 Keypad The internal clock rate of the AXD530 software may cause the meter to react slowly to a key push The reaction time of a key push will vary with different functions 1 3 seconds Maintain pressure on ...

Page 10: ...applied across the ports and no kinks are in the hoses See also Zeroing the Instrument UNIT This key is used to select the desired unit of measurement Using the AXD530 Basic Functions To Change Units Push and hold the UNIT key The display annunciator S will move to the left of the LCD beginning from the right Release the UNIT key at the desired location Display with annunciator and units of measur...

Page 11: ...nt Its factory default setting is to measure pressure in inches of water in H2O or Pascals Pa Velocity Selection Air velocity measurement can be accomplished using a Pitot static probe The following equations are used for pressure to velocity conversions Pressure 4005 fpm Velocity where Pressure is in inches H2O or Pressure 1 29 m s Velocity where Pressure is in Pa The velocity calculations assume...

Page 12: ...1 duct diameter upstream from obstructions but measurement accuracy will be impaired When measuring rectangular ducts use the following formula to find the equivalent diameter of the duct when calculating how far 7 5 diameters downstream or 3 diameters upstream is 4HV Pi Diameter Equivalent Where H horizontal duct dimension V vertical duct dimension Pi 3 14 It is also possible to take a single rea...

Page 13: ...ties obtained are averaged at each measuring point The average velocity is multiplied by the duct area to get the flow rate A different method uses two holes at 90 angles from one another decreasing the number of traverses with the probe by one Figure 1 Location of measuring points when traversing a round duct using the log Tchebycheff method Number of measuring points per diameter Position relati...

Page 14: ... wall on airflow A minimum of 25 points must be measured in order to get a good average The number of data points to be taken along each side of the duct depends on how wide the duct is For duct sides shorter than 30 inches five traversal points must be taken For duct sides of 30 through 36 inches six points must be taken For duct sides longer than 36 inches seven points must be taken Multiply the...

Page 15: ...ror Traverse methods outside of the USA will be slightly different TSI recommends purchasing a copy of the duct traverse specification you require from an approved regulatory or professional organization For further information refer to the 1993 ASHRAE Fundamentals Handbook Section 13 or to ASHRAE Standard 111 1988 Appendix B Pressure to Velocity Conversion Charts The AXD530 MicroManometer convert...

Page 16: ...14 The following graphs show approximate velocities for certain differential pressures in the range 0 01 to 0 10 inches H2O 2 5 25 Pa ...

Page 17: ...tself off after power up Batteries should be removed from the meter if it will not be used for two 2 months or longer Calibration checks are recommended every 12 months Keep the meter clean by using a mild detergent on its case Do not use abrasives or solvents Also do not allow liquids to enter the meter s case Dry thoroughly after cleaning Use an eyeglass cleaner and lens paper to clean the LCD w...

Page 18: ... cycle indication just before the meter turns off then replace the batteries MEASURENENT IS ERRATIC The input is not steady Check to see that your Pitot static probe is held steady ERRONEOUS READINGS Make sure that your Pitot static probe is perpendicular to the air flow you are measuring Clean your Pitot static probe it may be dirty Take measurements at a different location If any of these proble...

Page 19: ...bsolute pressure temperature and relative humidity record the differential pressure from the AXD530 the absolute pressure the temperature and the relative humidity at the measurement location Compute the density using the techniques used in the 1993 ASHRAE fundamentals handbook With the density and the differential pressure use the formula for Pitot probes also found in that handbook to compute th...

Page 20: ...a level and the air temperature but are unable to determine the absolute pressure Using the AXD530 Density Correction Factors chart find the appropriate correction factor value Multiply the displayed value by the value in this chart to get the corrected value Equation 1 ...

Page 21: ... 35 1 37 1 40 1 43 1 44 1 47 1 51 1 54 450 1 31 1 34 1 36 1 39 1 41 1 44 1 47 1 49 1 52 1 54 1 58 500 1 35 1 37 1 40 1 43 1 46 1 49 1 51 1 52 1 56 1 60 1 62 550 1 37 1 40 1 43 1 46 1 49 1 51 1 54 1 56 1 60 1 62 1 67 600 1 41 1 44 1 47 1 49 1 52 1 56 1 58 1 60 1 64 1 69 1 71 700 1 47 1 51 1 52 1 56 1 60 1 62 1 64 1 69 1 71 1 74 1 77 800 1 54 1 58 1 60 1 64 1 67 1 69 1 74 1 77 1 80 1 83 1 86 900 1 6...

Page 22: ...n effect is decreased The graph below shows the approximate error in of reading you can expect as differential pressure increases See specifications for detailed specifications Error as a percentage of reading in inches of water due to meter resolution ...

Page 23: ...__________________________ Serial Number ___________________________________________ Date of Purchase__________________________________________ Where Purchased _________________________________________ Describe Malfunction ______________________________________ Describe Environment _____________________________________ Return Instrument to Name___________________________________________________ Yo...

Page 24: ... applicable Instrument Name or Model Serial Number Date of Purchase Where Purchased TSI recommends that you keep a calibration log and keep all records of service on your instrument Instructions for Return 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 Include the Purchase Order showing ...

Page 25: ...e DO NOT DISCARD THE BOX If the instrument itself has been damaged a claim should be promptly filed against the carrier by the customer The selling agent will assist the customer by supplying all pertinent shipping information however the claim must 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 fo...

Page 26: ...______________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________ _______...

Page 27: ...light Low Battery Indicator 4 Units Annunciators Physical Dimensions 7 6 x 3 2 x 1 3 inches 193 x 81 x 33 millimeters Weight 11 6 oz 330g with batteries Power Source 3 AA size alkaline batteries Battery Life 15 hours with continuous use Model Part No AXD530 AXD530 meter 632 530 110 protective pouch 3 AA size batteries operator s manual calibration data sheet and two year limited warranty AXD532 Ma...

Page 28: ...__ TSI Incorporated Alnor Products 500 Cardigan Road Shoreview MN 55126 USA Toll Free 800 424 7427 Telephone 651 490 2811 September 2002 Fax 651 490 3824 Printed in USA www alnor com Part No 116 159 151 Rev 6 customerservice alnor com Copyright 2002 TSI Incorporated ...

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