Extech Instruments AN200 Manual de usuario

User's Manual

CFM/CMM Thermo Anemometer +

InfraRed Thermometer

Model AN200

UNITS

AREA

RECALL

cf m

cmm

nemometer

hermometer

AN200

PROBE

TEMPERATURE

AN200 V2.1 05/072

Introduction

Congratulations on your purchase of the Extech AN200 CFM/CMM Thermo Anemometer

with InfraRed Thermometer. This instrument measures Air Velocity, Air Flow (volume),

Air Temperature (with probe) and Surface Temperature (with the InfraRed function). The

large, easy-to-read backlit LCD includes primary and secondary displays plus numerous

status indicators. The InfraRed feature includes a laser pointer for convenient targeting.

In addition, the meter can store 16 area setting dimension for easy recall. This meter is

shipped fully tested and calibrated and with proper use will provide years of reliable

service.

Safety

•Use extreme caution when the laser pointer beam is on

•Do not point the beam toward anyone's eye or allow the beam

to strike the eye from a reflective surface

•Do not use the laser near explosive gases or in other

potentially explosive areas

AN200 V2.1 05/073

Specifications

Air Velocity Range Resolution Accuracy

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

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

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

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

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

Air Flow Range Resolution Area

CMM (cubic meters/min) 0-999999 m3/min .1 0 to 999.9m2

CFM (cubic ft/min) 0-999999 ft3/min .1 0 to 999.9ft2

Range Resolution AccuracyAir Temperature

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

Range Resolution Accuracy

-58 to -4oF (-50 to -20oC) 0.1oF/C ±9.0oF (5.0oC)

InfraRed Temperature

-4 to 500oF (-20 to 260oC) 1oF/C ±2% reading or ±4oF

(2oC) whichever is

greater

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 sensors: NTC-type precision thermistor and

InfraRed

IR Spectral response 6 to 14µm

IR Emissivity 0.95 fixed

IR distance ratio 8:1

IR sampling rate 2.5 readings per second approx.

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 Backlight and Laser are used continuously

the battery life is reduced to 2 to 3 hours approx.)

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

AN200 V2.1 05/074

Meter Description

1. Power ON/OFF button

2. Probe input jack

3. Laser pointer

4. IR Sensor

5. Rubber holster

6. LCD Display

7. IR thermometer

measurement button

8. Airflow buttons (4)

9. Air Temperature

function buttons (2)

10. Vane

11. Airflow Average button

12. Backlight button

Note: The battery

compartment, tilt stand and

tripod mount are located on

the rear of the instrument

Keypad

•Press to turn the meter ON or OFF

•IR + Laser Pointer Press and hold to measure.

•MAX/MIN Record and store the highest and lowest airflow or velocity readings.

◄(LEFT) also serves as change decimal point button in AREA mode

•UNITS Press to select the mode of operation. In FLOW mode, the meter displays air

volume. In VELOCITY mode, the meter displays air speed.

▲(UP) also serves as increase number button in AREA mode.

•HOLD Press to freeze the displayed reading. Press again to unlock display.

►(RIGHT) also serves as change digit button in AREA mode.

•AREA Press and hold to manually enter the area of a duct in CFM or CMM mode.

Press and hold to scroll thru memory locations.

This button also clears memory in the Averaging mode.

•Press to turn the backlight on/off. Hold to disable Auto Power Off.

•MAX/MIN (Temperature) Press to record and store the highest, lowest readings for air

temperature.

•HOLD (Temperature) Press to freeze the displayed temperature reading. Press again to

unlock the display.

•AVG Press and hold to enter averaging mode. Averages up to 20 readings.

AN200 V2.1 05/075

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

•PROBE TEMP: Reminder that the top LCD digits represent Air (Vane) Temperature

•: Indicates that the laser pointer is on.

•IR TEMP: Indicates that the larger LCD digits represent IR temperature measurement

•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

AN200 V2.1 05/076

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 dashed lines in place of an air velocity reading.

Air Velocity Measurements

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. Refer to

the diagram.

4. View the air velocity and temperature 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 Measurements (Up to 20 Point averaging)

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 all desired 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

AN200 V2.1 05/077

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

beeps twice to return to the CFM or CMM.measuring mode.

Air Flow Measurements (Up to 20 Point averaging)

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. (IMPORTANT: Please note that the average readings are only held for

5 seconds and cannot be recalled.)

4. Repeat steps 2 - 3 until all desired points have been measured.

5. Press the AREA button to clear the multipoint averaging memory.

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

beeps twice.

airflow

Arrow

Side view of Vane

AN200 V2.1 05/078

Data Hold (Air Velocity/Air Flow)

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

reading for later viewing.

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

(AVG) readings.

1. Press the button MAX/MIN button. The AVG indicator and RECORD indicator along

with the average reading will appear on the LCD display and the meter will begin

keeping track of the MAX, MIN and Average values.

2. Press the MAX/MIN button again. The MAX indicator will appear on the display and

display the Max reading.

3. Press the MAX/MIN button again to view the minimum reading. The MIN indicator

along with the minimum reading will appear on the LCD display and display the Min

reading.

4. Press the MAX/MIN button again to display current readings. NOTE: the meter will

keep recording MAX/MIN/AVG readings.

5. To clear and stop MAX/MIN/AVG recording and return to normal operation, press the

AREA button once when displaying the current reading.

AN200 V2.1 05/079

Temperature Units

1. Remove the meter’s rubber protective jacket and select the desired temperature units

using the °F/°C slide switch located in the battery compartment.

2. Replace the protective jacket and connect the sensor to the sensor input jack on top of

the meter.

Data Hold (Air Temperature)

1. While taking measurements, press the PROBE TEMPERATURE HOLD button to

freeze the air temperature reading.

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

3. Press PROBE TEMPERATURE HOLD again to return to normal operation.

Max/Min Record (Air Temperature)

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

readings.

1. Press the TEMPERATURE MAX/MIN button once. The MAX indicator will appear on

the display and the meter will begin keeping track of the MAX/MIN air temperature

values.

2. Press the button again to view the minimum reading. The MIN indicator along with the

minimum air temperature reading will appear on the LCD display.

3. Press the button again to return to normal operation.

Automatic Power OFF

To conserve battery life, the meter automatically turns off after 20 minutes. To override this

feature:

1. Turn the meter OFF.

2. Press and hold the (Backlight) key while turning the meter ON.

3. “dis APO” will appear in the display. The AUTO POWER OFF feature will now be

disabled.

4. Note that AUTO POWER OFF is re-enabled each time the meter is turned on.

5. Also note that AUTO POWER OFF is disabled in CFM/CMM mode.

AN200 V2.1 05/0710

InfraRed (Non-Contact) Temperature Measurements

1. The IR sensor is located at the top of the meter.

2. Point the sensor toward the surface to be measured.

3. Press and hold the red IR button to begin measuring the surface

temperature of a desired target. IR TEMP and will appear on

the display. The laser pointer will switch on to help aim the meter.

4. The measured IR surface temperature will appear at the center of

the LCD (larger digits). The temperature displayed is the

temperature of the area within the spot.

5. When the red IR button is released, the laser pointer will switch

off and the reading will freeze (data hold) on the display for

approximately 3 seconds.

6. Note that the vane (Air Temperature) continues to monitor

temperature during IR tests and its temperature is displayed on

the top of the LCD (smaller digits).

7. After approximately 3 seconds the meter defaults to the Air Flow

and Air Temperature display.

WARNING: Do not directly view or direct the laser pointer at an eye. Low power

visible lasers do not normally present a hazard, but may present some potential for

hazard if viewed directly for extended periods of time.

Battery Replacement

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

1. Disconnect the vane.

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

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