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User's Guide Vane Thermo-Anemometer Datalogger Model 451126 Introduction Congratulations on your purchase of Extech's Thermo-Anemometer Datalogger. This Vane-type Anemometer can indicate Air Velocity in five units of measure: Feet per minute, Meters per second, Miles per hour, Kilometers per hour, and Knots with Temperature o o displayed in C or F units. The meter can also display air flow in CFM or CMM. The built-in datalogger can record up to 2000 readings and the RS-232 interface provides PC data transfer capability. Specifications Display Data hold Sensor Structure Dual 4-digit (9999 count) Multi-function LCD Locks latest reading on the LCD display Air velocity sensor: Conventional twisted vane arm with low friction (sapphire) ball bearing. Temperature sensor: K-type thermocouple built into vane. 1/4" mounting nut provided Records Max/Min readings with push-key RECALL RS-232 PC serial interface Temperature: 32°F to 122°F (0°C to 50°C); Humidity: Ports and make sure that the brand name of the Serial to USB Adaptor is listed here. Note what COM PORT it has assigned. Make sure that in the 451126 Software you select the COM PORT it is assigned to in order to establish communication. 8 Model 451126 V2.0 6/08 Useful Equations and Conversions Area equations Rectangular Duct H Area = W x H W Circular Duct R A= π R (A= 3.14 x R x R) 2 Cubic equations CFM (ft /min) = Air Velocity (ft/min) x Area (ft ) CMM (m /min) = Air Velocity (m/sec) x Area (m ) x 60 Units Conversion Table m/s 1 m/s 1 ft/min 1 knot 1 km/hr 1 mph 1 0.00508 0.5144 0.2778 0.4464 ft/min 196.87 1 101.27 54.69 87.89 knots 1.944 0.00987 1 0.54 0.8679 km/hr 3.6 0.01829 1.8519 1 1.6071 mph 2.24 0.01138 1.1523 0.6222 1 3 2 3 2 9 Model 451126 V2.0 6/08 Battery Replacement The low battery indicator appears on the LCD display when it is time to replace the 9V battery, which powers the meter. To replace the battery: a. Turn the meter off. b. Remove the battery compartment screw and remove the battery compartment cover. c. Replace the 9V battery and reinstall the compartment cover. d. Fasten the compartment screw Warranty EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact information. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied. Calibration and Repair Services Extech offers repair and calibration services for the products we sell. Extech also provides NIST certification for most products. Call the Customer Care Department for information on calibration services available for this product. Extech recommends that annual calibrations be performed to verify meter performance and accuracy. Support line (781) 890-7440 Technical Support: Extension 200; E-mail: support@extech.com Repair & Returns: Extension 210; E-mail: repair@extech.com Product specifications subject to change without notice For the latest version of this User Guide, Software updates, and other up-to-the-minute product information, visit our website: www.extech.com Copyright © 2008 Extech Instruments Corporation (a FLIR company) All rights reserved including the right of reproduction in whole or in part in any form. 10 Model 451126 V2.0 6/08