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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
displayed in
C or
datalogger can record up to 2000 readings and the RS-232 interface provides PC data
transfer capability.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX 781.665.0780 - TestEquipmentDepot.com
o
F units. The meter can also display air flow in CFM or CMM. The built-in
Visit us at www.TestEquipmentDepot.com
Back to the Extech 451126 Product Page
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
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Table of Contents
Related Manuals for Extech Instruments NON-DISPLAY PORTABLE
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- Page 1 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 User's Guide Visit us at www.TestEquipmentDepot.com Back to the Extech 451126 Product Page 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 displayed in C or...
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Page 2: Specifications
Specifications General Specifications Display Dual 4-digit (9999 count) Multi-function LCD Data hold Locks latest reading on the LCD display Sensor Structure 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 Memory Recall Records Max/Min readings with push-key RECALL Data Output... -
Page 3: Meter Description
Meter Description LCD Display Vane Sensor ON/OFF Key RS-232 Connector Function/Numeric Keypad LCD Display Icon Definitions Average reading mode Temperature is displayed in degrees is selected centigrade Minimum reading mode Temperature is displayed in degrees is selected Fahrenheit 2/3V 2/3V Maximum mode is Cubic feet per minute (ft /min) selected... -
Page 4: Operation
Operation NOTE: For all air velocity or flow measurements, the air should pass through the vane from back to front. The rear of the vane can be found by locating the mounting nut. The front of the vane has the engraving "ANEMOMETER". For more accurate results, maintain a 20 axis of air direction with the rear of the vane (refer to Fig.2). - Page 5 2/3Vmax Air Flow Power the meter by pressing Press to select Air Flow. FLOW will display. Press to select the desired units (CFM, CMM). The previously stored area value will be displayed on the upper LCD display line. To enter a new area value press .
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Page 6: Data Logging
Datalogging Instantaneous (One-Shot) Datalogging To record one data point at any desired time, set the sampling rate = 0 by pressing in the VEL mode. The previously stored reading will be displayed on the upper LCD line. Enter a '0' sampling time and then press . - Page 7 Software The 451126 software lets the user: • Download logged recordings from the meter’s memory • Record to the PC • Graphically display readings from the meter System Requirements Hardware Requirements: 486 PC or better with COM 1 and COM 2 Serial ports Operating System Compatibility: Windows 95/98/NT/2000/XP Hardware Connection...
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Page 8: Starting The Software
Starting the Software 1. Run the program by opening the program named “Flow Anemometer”. Flow Anemometer is in the programs folder of your Windows software. 2. Wait for the program to initialize and select COM 1 or 2 as required. The program will load and the main display will appear. -
Page 9: Operating The Software
Operating the Software Graphical Display Mode The display command offers 5 different displays. Click Display on menu bar to select. Click Option to set Upper and Lower Limits. The software will then flag readings exceeding the limits. Main Display Digital Display Click Reset button on main display to clear Min/Max Analog Display... - Page 10 Data Acquisition Mode In data acquisition mode the meter is connected to a PC with the data being saved directly to the PC’s memory. In the Flow Anemometer program, click File, and then click Name. Enter a file name and click OK Click Option then Sample, enter a sampling interval and then click OK...
- Page 11 Viewing Files Files can be view in table form or they can be plotted on a graph. Viewing in a table: In the Flow Anemometer program, click File, and then click View File. When the View screen opens click File then click Open. In the Look in list, click the drive, folder, or Internet location that contains the file you want to open.
- Page 12 Downloading Logged Data to the PC Note: The RS232 communication symbol should NOT be displayed in the LCD when downloading. Click Datalogger on the menu. The Datalogger Anemometer screen will open. Click the Download button. The Log File screen will open. Enter a File name and click OK button.
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Page 13: Useful Equations And Conversions
Useful Equations and Conversions Area equations Circular Duct Rectangular Duct π Area = W x H (A= 3.14 x R x R) 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 ft/min... -
Page 14: Appendix A: Real-Time Datalog-To-Pc Transfer Byte 1 0D (Hex)
Appendix A: Real-time Datalog-to-PC transfer Byte 1 0D (Hex) Byte 9 Digit 2 in upper LCD Byte 2 bit4: Velocity OL, bit5 Area OL, bit 6: Byte 10 Digit 1 in upper LCD Temp OL Byte 3 0: m/s, 1: ft/min, 2: knots, 3: km/hr, 4: MPH Byte 11 Digit 0 (LSB) in upper Byte 4 bit2: MAX, bit3: MIN, bit4: 0:VEL 1:FLOW,...