Extech Instruments AN100 Manual de usuario

User's Manual

CFM/CMM Thermo Anemometer

Model AN100

AN100-EU V3.0 11/072

AN100-EU V3.0 11/073

Display Layout

MAX (top of LCD): Max Hold function engaged for the Air Temperature function

HOLD (top of LCD): Data Hold function engaged for the Air Temperature function

VEL: indicates that meter is in air velocity mode

FLOW: indicates that meter is in air flow mode

MAX (bottom of LCD): Max Hold for the IR Temperature and RH function

HOLD (bottom of LCD): Data Hold for the IR Temperature function and RH function

oC / oF: Temperature units of measure

CFM/CMM: airflow units of measure

Ft2, m2: units for area dimensions

m/s, ft/min, km/h, MPH, knots: air velocity units of measure

X10, X100: multipliers for air flow readings

AVG: air averaging mode

RECORD: indicates that min/max function is running (top for temp, bottom for air)

Large LCD digits at center of display for Relative Humidity and IR Temperature

Smaller LCD digits at top, right of display for Probe Temperature

: Low battery indicator

AN100-EU V3.0 11/074

Operation

Connecting the Vane

1. The vane plug is inserted in the meter’s sensor jack at the top of the meter. The plug

and jack are keyed so that the plug can only fit in the jack one way.

2. Turn the plug carefully until it lines up with the jack and then firmly push the plug in

place. Do not apply undue force or try to twist the plug side-to-side.

3. If the vane is not connected to the meter or if the sensor is defective, the LCD display

will indicate OL in place of a Temperature reading.

Air Velocity Measurements (Single Point)

1. Turn on the meter using the ON/OFF button.

2. Press UNITS button to select the desired unit of

measure. NOTE: At power up the meter will

display the last unit of measure previously

entered.

3. Place the sensor in the air stream. Ensure that

the air enters the vane as indicated by the arrow

sticker placed inside the vane.

4. View the readings on the LCD Display. The

large main LCD display shows the Air Velocity

reading. The upper right LCD sub-display shows

the temperature reading.

Air Velocity Averaging Mode

1. To enter 20 Point Averaging Mode, press and hold the AVG button until it beeps twice.

The AVG icon will be displayed.

2. Take a measurement and press the AVG button. A single beep will sound and the

HOLD icon will appear in the display.

3. The average reading will be displayed and number of readings measured will appear in

the upper right hand corner of the display. After 5 seconds, the display will return to the

current reading.

4. Repeat steps 2 - 3 until the desired number of points have been measured.

5. To return to standard velocity measuring mode press and hold AVG button until meter

beeps twice.

Note: In the standard velocity measuring mode, press the AVG button once to recall the

previous average. The average will be cleared when you enter the Averaging Mode

again.

airflow

Arrow

Side view of Vane

AN100-EU V3.0 11/075

Air Flow Measurements (CMM / CFM)

1. Turn on the meter using the ON/OFF button

2. Press the UNITS button to select the desired air flow

units: CMM (cubic meters per minute) or CFM (cubic

feet per minute). NOTE: At power up the meter will

display the last unit of measure previously entered.

3. To begin entering the area in m2or ft2, press and

hold the AREA button until it beeps twice. The

leftmost digit of the bottom display will begin to flash.

4. Use the ▲ (UP) button to change the flashing digit

Use the ◄ (LEFT) button to move the decimal

Use ► (RIGHT) button to select the other digits.

After all of the digits are entered, press and hold the

AREA button (until meter beeps twice) to save the area into memory and return to

CFM or CMM measuring mode.

5. Place the sensor in the air stream. Ensure that the air enters the vane as indicated by

the arrow sticker placed inside the vane. Refer to the diagram. The large main LCD

display shows the Air Velocity reading. The upper right LCD sub-display shows the

temperature reading.

The meter has 16 memory locations (8 for CFM and 8 for CMM) that can be used to store

commonly used area sizes that you can recall at anytime.

1. Press the AREA button until meter beeps twice. A memory location number will

appear in the top right of the display indicating the memory location.

2. Push the NEXT button to scroll thru and select the desired location. Once you have

selected the desired memory location enter your dimension

Use the ▲ (UP) button to change the flashing digit

Use the ◄ (LEFT) button to move the decimal

Use ► (RIGHT) button to select the other digits. After all of the digits are entered,

press and hold the AREA button (until it beeps twice) to save the area into memory

and return to CFM or CMM measuring mode.

To select and use a previously stored dimension, press and hold the AREA button until it

beeps twice.

Press NEXT to scroll thru the 8 memory locations. Press and hold the AREA button until it

beeps twice to return to CFM or CMM measuring mode.

Air Flow Averaging Mode

1. To enter 20 Point Averaging Mode, press and hold the AVG button until it beeps twice.

The AVG icon will be displayed.

2. Take a measurement and press the AVG button. A single beep will sound and the

HOLD icon will appear in the display.

3. The average reading will be displayed and number of readings measured will appear in

the upper right hand corner of the display. After 5 seconds, the display will return to the

current reading.

4. Repeat steps 2 - 3 until the desired number of points have been measured.

5. To return to standard airflow measuring mode press and hold AVG button until meter

beeps twice.

Note: In the standard velocity measuring mode, press the AVG button once to recall the

previous average. The average will be cleared when you enter the Averaging Mode

again.

airflow

Arrow

Side view of Vane

AN100-EU V3.0 11/076

Data Hold (Air Velocity/Air Flow)

1. While taking measurements, press the HOLD button to freeze the air velocity/air flow

reading.

2. The HOLD indicator will appear in the bottom of the LCD display.

3. Press HOLD again to return to normal operation.

MAX/MIN/AVG Record (Air Velocity/Air Flow)

This allows the user to record and view the highest (MAX), lowest (MIN) and average

AN100-EU V3.0 11/077

Battery Replacement

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

1. Disconnect the sensor.

2. Remove the meter’s rubber protective jacket

3. Use a Phillips screwdriver to open the rear battery compartment

4. Replace the 9V battery

5. Close the battery compartment and replace the meter’s protective jacket

You, as the end user, are legally bound (Battery ordinance) to return all used

batteries and accumulators; disposal in the household garbage is prohibited!

You can hand over your used batteries / accumulators, gratuitously, at the

collection points for our branches in your community or wherever batteries /

accumulators are sold!

Disposal

Follow the valid legal stipulations in respect of the disposal of the device at the

end of its lifecycle

WARNING: To avoid electric shock, do not operate the meter until the battery cover is in

place and fastened securely.

NOTE:: If your meter does not work properly, check the fuses and batteries to make sure that

they are still good and that they are properly inserted.

AN100-EU V3.0 11/078

Specifications

Air Velocity Range Resolution Accuracy

m/s (meters per sec) 0.40 - 30.00 m/s 0.01 m/s ± (3% + 0.20 m/s)

km/h (kilometers/hour) 1.4 - 108.0 km/h 0.1 km/h ± (3% + 0.8 km/hr)

ft/min (feet per minute) 80 – 5900 ft/min 1 ft/min ± (3% + 40 ft/m)

mph (miles per hour) 0.9 – 67.0 mph 0.1 mph ± (3% + 0.4 MPH)

knots (nautical MPH) 0.8 to 58.0 knots 0.1 knots ± (3% + 0.4 knots)

Air Flow Range Resolution Area

CMM (cubic meters/min) 0-9999 m3/min 1 0 to 9.999m2

CFM (cubic ft/min) 0-9999 ft3/min 1 0 to 9.999ft2

Air Temperature Range Resolution Accuracy

14 - 140oF (-10 - 60oC) 0.1oF/C 4.0oF (2.0oC)

Circuit Custom LSI microprocessor circuit

Display Dual function 0.5" (13 mm) 4-digit LCD

Sampling rate 1 reading per second approx.

Sensors Air velocity/flow sensor: Conventional angled vane arms with

low-friction ball bearing

Temperature sensor: NTC-type precision thermistor

Automatic Power off Auto shut off after 20 minutes to preserve battery life

Operating Temperature 32°F to 122°F (0°C to 50°C)

Storage Temperature 14 to 140oF (-10 to 60oC)

Operating Humidity <80% RH

Storage Humidity <80% RH

Operating Altitude 2000 meters (7000ft) maximum

Battery One 9 volt (NEDA 1604) battery

Battery life 80 hours approx. (if the Backlight is used continuously, battery

life will be reduced significantly)

Battery Current 8.3 mA DC approx.

Weight 1.6 lbs. (725g) including battery & probe

Dimensions Main instrument: 7.0 x 2.9 x1.2" (178 x 74 x 33mm)

Sensor Head: 2.75” (70mm) Diameter

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 feetor 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 1 0.00987 0.01829 0.01138

1 knot 0.5144 101.27 1 1.8519 1.1523

1 km/h 0.2778 54.69 0.54 1 0.6222

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) =



x r 2

Where   = 3.14 and r2= radius x

radius

HT30-EU-EN-V3.2--9/11

Phone: 01235 838 555

E-mail: cs@airconcern.co.uk

web: www.airconcern.co.uk

Air Concern Ltd, Building 173 Curie Avenue Harwell Didcot, Oxfordshire OX11 0QG

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