Extech Instruments 451126 User Manual
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Extech Instruments 451126 User Manual

Vane thermo-anemometer datalogger
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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.
o
F units. The meter can also display air flow in CFM or CMM. The built-in

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Summary of Contents for Extech Instruments 451126

  • Page 1 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...

  • Page 2: Specifications

    (CMM: 0 to 45.00 m/s; CFM: 0 to 8800 ft/min) Range Resolution Area CFM (ft /min) 0 to 999900 0.001 to 100 0.001 to 9999 CMM (m /min) 0 to 999900 0.001 to 100 0.001 to 9999 Model 451126 Version 1.6 February 2004...

  • Page 3: Meter Description

    Recalling stored Multiply reading by ten measurements Appears when Meters per second recording readings RS-232 PC Interface is ft/min Feet per minute activated Square feet Miles per hour Square meters Km/h Kilometers per hour Model 451126 Version 1.6 February 2004...

  • Page 4: Operation

    Place the vane in the air flow (Fig.2). Wait approximately 2 seconds for a stabilized Air Flow reading. The equation below is used to calculate Air Flow: AIR FLOW = (AIR VELOCITY) x (AREA) Model 451126 Version 1.6 February 2004...
  • Page 5 MAX mode. The meter will only display the highest reading. 2. Press again to enter the MIN. The meter will only display the lowest reading. 3. Press to exit the MAX or the MIN mode. Model 451126 Version 1.6 February 2004...

  • Page 6: Data Logging

    3. Press again and the desired data will be displayed. 4. Press to return to normal operation. Clearing Datalog Memory Press and hold while powering up the meter to clear the meter's datalog memory. Model 451126 Version 1.6 February 2004...
  • 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...

  • Page 8: Starting The Software

    The RS232 icon will appear on the upper right hand side display of the meter. The NO COM icon will disappear. Communications has been established. Values will appear in the diplay. Model 451126 Version 1.6 February 2004...

  • Page 9: Operating The Software

    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 Graphical Display Click Scale in Graphical Mode to change x and y axis scale. List Display Model 451126 Version 1.6 February 2004...
  • Page 10 Name. Enter a file name and click OK Click Option then Sample, enter a sampling interval and then click OK Click File then Start Recording. To stop the meter click File then click End Recording. Model 451126 Version 1.6 February 2004...
  • Page 11 In the folder list, locate and open the folder that contains the file. The File will then open. Click Print to print the graph. The graph can also be modified and manipulated by using the graphing commands. Model 451126 Version 1.6 February 2004...
  • Page 12 When transfer is completed click OK. The datalogger screen will appear and display the number of records and the sampling rate they were taken at. Click File and Exit. Data can now be viewed Model 451126 Version 1.6 February 2004...
  • Page 13 Units Conversion Table ft/min knots km/hr 1 m/s 196.87 1.944 2.24 1 ft/min 0.00508 0.00987 0.01829 0.01138 1 knot 0.5144 101.27 1.8519 1.1523 1 km/hr 0.2778 54.69 0.54 0.6222 1 mph 0.4464 87.89 0.8679 1.6071 Model 451126 Version 1.6 February 2004...

  • Page 14: Battery Replacement

    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 Model 451126 Version 1.6 February 2004...

  • Page 15: Appendix A: Real-Time Datalog-To-Pc Transfer Byte 1 0D (Hex)

    Byte 783 Not used lower LCD Byte 770 Digit 1 in lower LCD Byte 784 Not used Byte 771 Digit 2 in lower LCD Byte 785 - Record No. 2 to Record No. 32768 2000 Model 451126 Version 1.6 February 2004...

  • Page 16: Warranty

    Warranty EXTECH INSTRUMENTS CORPORATION 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 on 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.

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