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Summary of Contents for Kurz 490 series
- Page 1 Series 490 Portable Velocity Meter User Guide Created by Robert Morpeth 368051B...
- Page 2 (including negligence), strict liability or other theories of law, by reason of such use. The Kurz logo is a trademark of Kurz Instrument, Inc., registered in the U.S. and other countries. Use of the Kurz logo for commercial purposes without the prior written consent of Kurz Instruments, Inc. may constitute trademark infringement in violation of federal and state laws.
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Page 3: Table Of Contents
Table of Contents Series 490 ................Overview ......................Operating the Series 490 ................Application Tips ....................Large Duct Openings ................Changing Air Temperature ..............Average Air Velocity ................HEPA Air Flow ..................Small Duct Flow Rates ................Standard vs. Actual Velocity ................Battery Replacement .................. - Page 4 Series 490 User’s Guide...
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Page 5: Series 490
Series 490 Overview The Kurz Series 490 provides reliable air flow measurement in a high-quality, portable velocity meter. Each unit works up to 50 hours on a set of batteries. The low-power sensor exhibits extraordinary sensitivity to airflow. The nonconductive graphite probe shaft is extremely strong. -
Page 6: Operating The Series 490
Series 490 Operating the Series 490 Before taking a measurement: When the Series 490 is powered ON, a red indicator light illuminates. • Check the battery voltage by sliding the power switch to BAT. • The needle must be to the right side of the scale in the BATT OK area. Slide the power switch to HIGH. -
Page 7: Application Tips
Series 490 Application Tips The Series 490 measures air velocities for a wide range of applications. Supply openings, return openings, and suction openings • Wind speed for meteorological studies and sports activities (such as sailing, • golf, and track & field) Clean rooms •... -
Page 8: Hepa Air Flow
The Series 490 probe can be semi-permanently mounted in a duct wall using a Kurz duct mounting bracket. The adapter is easily installed by drilling a 5/16” hole into the duct and mounting the adapter plate with four sheet metal screws. -
Page 9: Standard Vs. Actual Velocity
The basic sensing element consists of a velocity sensor and a temperature sensor. The velocity sensor is heated and operated at a constant temperature. All Kurz air velocity meters are referenced to standard conditions: Temperature: 25 C (77 F) •... -
Page 10: Battery Replacement
Series 490 Battery Replacement The Series 490 requires new batteries or must be recharged when the needle is to the left of the vertical line of the battery indicator. Insufficient battery voltage will affect performance, including accuracy and potential deflection at zero. Using a higher voltage battery (above 1.5 VDC AA) voids the safety approval, introduces calibration errors, and can damage the electronics. -
Page 11: Maintenance & Repair
Annual recalibration is suggested based on the accuracy of the data requirements and the amount of use. Before sending in your Series 490 unit, contact Kurz to obtain a return materials authorization (RMA) number. This expedites the calibration/shipping process. - Page 12 Series 490 Series 490 User’s Guide...
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