Extech Instruments 407113 Manuel utilisateur

User's Guide

Heavy Duty CFM Thermo-Anemometer

Model 407113

www.burntec.com

Model 407113 V3.2 07/07

Introduction

Congratulations on your purchase of the Extech 407113 CFM meter. This handheld

meter can display Air Flow (CFM) with Area or Air Velocity with Temperature on a

10,000-count (0 to 9999) dual display LCD. Other functions include MIN/MAX

Record/Recall, RS-232 PC interface, and Data Hold. The metal vane sensor offers

rugged durability and higher temperature withstand than comparable devices. Careful

use of this meter will provide years of reliable service.

Specifications

General Specifications

Display Dual Display Multi-function 10,000-count (0 to 9999) LCD

Measurements Air Velocity: m/s, km/h, ft/min, knots, mph;

Air Flow: CMM (m3/min) and CFM (ft3/min);

Temperature: °C and °F

Data Hold Freezes displayed reading

Sampling rate One (1) reading per second

Sensors Air velocity/flow sensor: Metal angled vane arms with low-

friction ball bearing. Temp. Sensor: Precision thermistor

MIN/MAX Records/Recalls lowest and highest readings

Auto Power OFF Automatic shut off after 15 minutes

PC Interface RS-232 Serial Communications (16-bit data stream)

Over range indication 1___ appears on the LCD

Low battery indication LBT appears on the LCD

Power supply 9V Battery (consumption 8.3mA approx.)

Operating conditions Meter: 32 to 122oF (0 to 50oC); 80% RH max.

Sensor: 32 to 175oF (0 to 80oC)

Dimensions / Weight Main instrument: 7.1 x 2.8 x1.3" (180 x 72 x 32mm)

Sensor head: 2.8” (72mm) diameter

Weight 0.84 lbs. (381g) for meter and sensor

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Model 407113 V3.2 07/07

Range Specifications

Air Velocity Measurements Range Resolution Accuracy (%rdg)

m/s (meters per second) 0.50 - 35.0 m/s 0.01 m/s<10

0.1 m/s >10 ± (2% + 0.2m/s)

km/h (kilometers per hour) 1.8 – 126.0 km/h 0.1 km/h ± (2% + 0.8km/h)

ft/min (feet per minute) 100 – 6890 ft/min 1 ft/min ± (2% + 40ft/min)

mph (miles per hour) 1.1 – 78.3 mph 0.1 mph ± (2% + 0.4m/h)

knots (nautical miles per hour ) 1.0 to 68 knots 0.1 knots ± (2% + 0.4knots)

Air Flow Measurements Range Resolution Area

CMM (cubic meters per minute) 0-999,900 m3/min 0.001 to 100 0 to 9,999m2

CFM (cubic feet per minute) 0-999,900 ft3/min 0.001 to 100 0 to 9,999ft2

Air Temperature Range Resolution Accuracy

32 to 175oF (0 to 80oC) 0.1o F/C 1.5oF (0.8oC)

www.burntec.com

Model 407113 V3.2 07/07

Meter Description

1. Sensor Input

2. RS-232 PC Interface jack

3. LCD Display

4. Vane

5. Rubber Holster

6. Keypad

7. Battery compartment (rear)

Note: To access the rear battery compartment, first remove

the rubber holster that jackets the meter.

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Model 407113 V3.2 07/07

Operation

Air Velocity Measurements

1. Connect the sensor to the sensor input jack on top of the meter.

2. Turn on the meter using the Power button.

3. Select the VELOCITY function using the FLOW / VELOCITY 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.

5. Select the desired air velocity units

using the UNIT button. The LCD will

reflect the current unit selection.

6. Place the sensor in the air current to

be measured with the

symbol on the inlet side of the vane

(see diagram).

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

1. While taking measurements, press the HOLD button to freeze the LCD reading.

2. The HOLD 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 407113 allows the user to record 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 recording the MAX and MIN values.

2. Press the RECORD/RECALL button to stop the MAX/MIN recording and display the

maximum reading. 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.

NOTE: Placing the meter in the RECORD/RECALL mode by pressing

the RECORD/RECALL button disables the AUTO POWER OFF feature.

NOTE: Handle the vane carefully. If the metal vane blades are inadvertently

bent or damaged erroneous readings may result.

Air Direction

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Model 407113 V3.2 07/07

Air Flow (Volume) Measurements (CMM / CFM)

1. Connect the sensor to the sensor input jack on top of the meter.

2. Turn on the meter using the POWER button.

3. Select the FLOW mode using the FLOW/VELOCITY button. The LCD will display

FLOW CFM or FLOW CMM when the flow function has been selected.

4. 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.

5. Measure the dimensions of the duct or vent and calculate the area in square feet or

square meters

Note: If the dimensional measurements are made in inches (or cm), convert them feet (or

meters) before calculating the square area.

6. Press the AREA button to begin entering the area in m2or ft2. Use the button to

increment the flashing digit, use the button to decrement, use the button to select

the next digit, and use the button to set the decimal point.

7. Press the ENTER/RESET button after the area value has been entered. The bottom

display will indicate the area entered in ft2or m2. 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.

8. Note that for FLOW measurements, three modes apply: The normal, default mode,

where the actual flow is indicated and the two modes described below under 2/3 MAX

Flow and AVG Flow.

Note: The temperature function is not active in the FLOW mode.

2/3V MAX Flow Mode

In this mode the meter will display two-thirds the measured Flow (Volume). To access this

mode, ensure that the meter is in the FLOW mode (via the FLOW/VELOCITY button) and

then press the FLOW MODE button until the 2/3V MAX display icon appears. Now the

Flow display will be 2/3 the actual measurement. To return to the normal display mode,

press the FLOW MODE button until the 2/3VMAX and the AVG icons switch off.

AVG (Average) Flow Mode

In this mode the meter will display the AVERAGE Flow for up to 20 readings. To access

this mode, ensure that the meter is in the FLOW mode (via the FLOW/VELOCITY button)

and press the FLOW MODE button until the AVG display icon appears. Now each time the

AVG/START button is pressed a reading will be taken and averaged. The lower LCD

display becomes a 20-reading counter and with each reading taken the counter is

incremented. Allow 3 or 4 seconds between AVG/START button presses for the display

counter to update. The main LCD displays the averaged Air Flow value. To return to the

normal display mode, press the FLOW MODE button until the AVG icon switches off.

RS-232 PC Interface

The 407113 is equipped with a 3.5mm phone jack (meter top) for connection to a PC for

data acquisition purposes. To obtain PC interface cabling and WindowsTM data acquisition

software (Model 407001), contact Extech Instruments or an authorized distributor.

Instructions for use are provided with the data acquisition software/hardware kits.

www.burntec.com

Model 407113 V3.2 07/07

Battery Replacement

When the LBT icon appears on the LCD, the 9V battery must be replaced.

1. Remove the rubber holster that surrounds the entire meter

2. Slide off the rear battery compartment

3. Replace the 9V battery

4. Affix the battery compartment cover and the meter holster

Useful Equations and Conversions

Area equation for rectangular or square ducts

Area equation for circular ducts

Cubic equations

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 m/s 1196.87 1.944 3.6 2.24

1 ft/min 0.00508 10.00987 0.01829 0.01138

1 knot 0.5144 101.27 11.8519 1.1523

1 km/h 0.2778 54.69 0.54 10.6222

1 MPH 0.4464 87.89 0.8679 1.6071 1

Width (W)

Height (H) Area (A) = Width (W) x Height (H)

CFM (ft3/min) = Air Velocity (ft/min) x Area (ft2)

CMM (m3/min) = Air Velocity (m/sec) x Area (m2) x 60

Radius Area (A) = 6x r2

Where 6 = 3.14 and r2= radius x

radius

www.burntec.com

Model 407113 V3.2 07/07



Support line (781) 890-7440

Technical support: Extension 200; E-mail: [email protected]m

Repair & Returns: Extension 210; E-mail: [email protected]

Product specifications subject to change without notice

For the latest version of this User’s Guide, Software updates, and other

up-to-the-minute product information, visit our website: www.extech.com

Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451

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 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 complete repair and calibration services for all of the products we sell.

For periodic calibration, NIST certification on most products or repair of any Extech

product, call customer service for details on services available. Extech recommends that

calibration be performed on an annual basis to ensure calibration integrity.

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