User`s Manual CFM Thermo Anemometer Model 407114
Contents
1. Flow and Temperature Units of measure and user alerts are also displayed on the LCD 4 Vane Sensor Hold the sensor in the flow of air to initiate a reading 5 Protective rubber holster Must be removed to access the rear battery compartment 6 Keypad see below POWER Press to turn the meter ON or OFF HOLD Press to freeze the displayed reading Press again to unlock display C F Press to select the unit of measure for Temperature readings RECORD RECALL Used to store the highest lowest and average readings for later recall Refer to the Operation section of this manual for more details This button also functions as the DECIMAL point when programming UNITY Press to select the unit of measure for Air Velocity This button also functions as the DOWN ARROW button when programming FLOW VELOCITY Press to select the mode of operation In FLOW mode the meter displays air volume In VELOCITY mode the meter displays air speed gt RIGHT Arrow button Used when programming A UP Arrow button Used when programming FLOW MODE Press to select the Normal AVG or 2 3 MAX Air Flow operational mode Refer to the Operation section of this manual for more details AVG START In the FLOW mode press to store a reading in the AVERGGE utility Up to 20 readings can be averaged Refer to the Operation section of this manual for more details ENTER RESET Used in the Flow mode while entering the duct area Refer2. Test Equipment 99 Washington Street User s Manual Depot Melrose MA 02176 Phone 781 665 1400 1 800 517 8431 Toll Free 1 800 517 8431 CFM Thermo Anemometer Air Velocity Air Flow and Temperature Model 407114 Specifications General Specifications Custom LSI microprocessor circuit Display Dual function 0 5 13 mm 4 digit LCD Measurement units Air Velocity m s km h ft min knots mph aoe Air Flow CMM m min CFM ft min Temp C amp F 1 reading per second approx Sensors Air velocity flow sensor Conventional angled vane arms with low friction ball bearing Temperature sensor Precision thermistor Max 80 RH Dimensions Main instrument 7 1 x 2 8 x1 3 180 x 72 x 32mm Sensor Head 72mm Diameter Range Specifications rdg OWA BEREA CFM cubic ft min 0 999 900 ft min 0 001 to 0 to 9 999ft 100 Ppp 122 F 0 50 C 0 1 F C 15 F 08 C CMM cubic meters min 0 999 900 m min 0 001 to 0 to 9 999m 100 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Meter Description 1 Sensor plug Can be inserted in the sensor jack from only one direction Ensure proper orientation before exerting force to plug in the sensor 2 PC Interface jack RS 232 For use with the interface cable provided in the optional 407001 PC Data Acquisition kit 3 LCD Display for Air Velocity Air
3. cimal point Press the ENTER RESET button when the area has been entered The bottom display normally used for the temperature display will indicate the area entered in ft or m The main LCD displays the air flow in CFM cubic feet per minute or CMM cubic meters per minute If the CFM or CMM reading exceeds 9999 use the displayed X10 or X100 multiplier to calculate the reading For Air Flow measurements three modes apply The normal default mode where the actual flow is indicated and the two modes described below Press the FLOW MODE button to select one of the two modes listed below 2 3V MAX MODE LCD displays 2 3 the measured value AVG MODE Up to 20 readings can be taken separately and averaged Select the AVG mode via the FLOW MODE button and then press the AVG START button to take a reading Up to 20 readings can be taken and averaged The lower LCD display provides a 1 to 20 counter and each time a reading is taken the counter is incremented The main LCD displays the averaged air flow Note that the temperature function is not active in the Air Flow mode Automatic Power OFF The Model 407114 turns off automatically after 15 minutes of operation This feature was designed to conserve battery power Note that when the meter is in the RECORD RECALL mode the Automatic Power OFF feature is disabled Battery Replacement When LBT appears on the LCD the 9V battery must be replaced Ci ON Disconnect the sensor and th
4. cord and view the highest MAX and lowest MIN readings 1 Press the RECORD RECALL button once The REC indicator will appear on the display and the meter will begin keeping track of the MAX and MIN values 2 To view the MAX reading press RECORD RECALL again The MAX indicator along with the maximum reading will appear on the LCD display 3 Press RECORD RECALL again to view the minimum value the MIN indicator along with the minimum reading will appear on the LCD display 4 To return to normal operation press and hold the RECORD RECALL button for approx 3 seconds The display indicators REC MAX and MIN will disappear Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Air Flow Measurements CMM CFM 1 2 3 7 Connect the sensor to the sensor input jack on top of the meter Turn on the meter using the Power button Select the FLOW mode using the FLOW VELOCITY button The LCD will display FLOW when the Flow function has been properly selected Select the desired air flow units CMM cubic meters per minute or CFM cubic feet per minute using the UNIT button The LCD will reflect the selection Press the AREA button to begin entering the area in m or ft Use the button to increment the flashing digit use the Whbutton to decrement the flashing digit use the gt button to select the next digit and use the RECORD RECALL button to set the de
5. e RS 232 PC Interface cable from the meter Remove the meter s rubber protective jacket Use a flat blade screwdriver or a coin to open the rear battery compartment Replace the 9V battery Close the battery compartment and replace the meter s protective jacket RS 232 PC Interface The 407114 is equipped with a 3 5mm phono jack meter top for connection to a PC To obtain the Model 407001 Windows data acquisition kit contact Extech Instruments The kit includes a cable that connects the meter to a PC Instructions for use are provided with the 407001 kit Useful Equations and Conversions Area equation for rectangular or square ducts Height H Width W Area A Width W x Height H Area equation for circular ducts Radius Area A 7 x r Where 7m 3 14 and r radius x radius Cubic equations CFM ft min Air Velocity ft min x Area ft CMM m3 min Air Velocity m sec x Area m x 60 NOTE Measurements made in inches must be converted to feet or meters before using the above formulae Unit of Measure Conversion Table m s ft min knots km h MPH 1 MPH 0 4464 87 89 0 8679 1 6071 1 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com
6. to the Operation section of this manual AREA Used when manually entering the area of a duct Refer to the Operation section of this manual 7 Battery compartment located on the back of the instrument The rubber protective jacket must be removed from the meter to access the compartment Operation Air Velocity Measurements 1 Connect the sensor to the sensor input jack on top of the meter 2 Turnon the meter using the POWER button 3 Select the VELOCITY function using the VEL FLOW button The LCD will display VEL when the velocity mode is selected 4 Select the desired temperature units using the C F select button The LCD will reflect the current unit selection d yellow 5 Select the desired air velocity units using the UNIT dot button The LCD will reflect the current unit selection lt 6 Place the sensor in the air current with the yellow dot lt airflow on the exhaust side of the vane see diagram S 7 View the air velocity and temperature readings on the LCD Display The large main LCD display shows the Air Velocity reading The lower LCD sub display shows the temperature reading Data Hold Feature 1 While taking measurements press the HOLD button to freeze the LCD reading for later viewing 2 The DH indicator will appear on the LCD when the display is in Data Hold mode 3 Press HOLD again to return to normal operation Maximum and Minimum Recording The 407114 allows the user to re
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