Extech Instruments 250W Series User manual

User Manual

AN250W Anemometer

Bluetooth®Connectivity with the ExView®Mobile App

Table of contents

1 Introduction........................................................................1

2 Safety ................................................................................2

3 FCC Compliance .................................................................3

4 Product Description ............................................................4

4.1 Meter Description .......................................................4

4.2 Function Buttons ........................................................4

4.3 Display Symbols.........................................................5

5 Operation...........................................................................6

5.1 Powering the Meter ..................................................... 6

5.2 Auto Power Off (APO)..................................................6

5.3 Taking Measurements .................................................6

5.4 Changing Measurement Units ....................................... 7

5.5 Data Hold Function .....................................................7

5.6 LCD Backlight............................................................ 7

5.7 MAX/AVG Readings .................................................... 7

5.8 Bluetooth Operation ....................................................8

6 Maintenance.......................................................................9

6.1 General Cleaning .......................................................9

6.2 Battery Replacement...................................................9

7 Specifications................................................................... 10

7.1 General Specifications............................................... 10

7.2 Measurement Specifications ....................................... 10

7.3 Environmental Specifications ...................................... 11

7.4 Connectivity Specifications ......................................... 11

8 Two-year Warranty............................................................. 12

8.1 Calibration and Repair Services................................... 12

8.2 Contact Customer Support ......................................... 12

#NAS100075; r. AA/78827/78827; en-US ii

Introduction

Thank you for selecting the Extech AN250W Anemometer. This meter meas-

ures air velocity and temperature. The vane, situated at the top of the meter,

measures the velocity of moving air and includes a sensor that measure air

temperature.

The air velocity and temperature readings are shown on the top and bottom

rows of the LCD, respectively. The AN250W also displays air velocity in the

Beaufort scale (1 to 12).

The meter includes Bluetooth connectivity, MAX/AVG memory, selectable

units of measure, auto power off, data hold, backlit LCD, and a tripod mount.

Using the Extech ExView mobile app, you can pair your smart devices with

the meter using Bluetooth. The app and the W Series meters were developed

together for seamless integration. Download the free app from the App Store

(iOS®) or from Google Play (Android™).

This quality instrument is designed to provide years of reliable service, high

accuracy and simple operation. Please visit the Extech website for additional

information and world-class support.

#NAS100075; r. AA/78827/78827; en-US 1

Safety

Please read all safety information before using this device

CAUTION

• Check for damage to the device’s housing, sensor, display, and battery compartment

before use. If obvious damage or abnormalities are noticed, please discontinue use

and return the device for service.

• Do not attempt to open the meter housing or access the sensor module. There are no

user-serviceable components in this device.

• Replace the batteries immediately after the low battery symbol appears. If the device is

to be stored for a period of months, please remove the batteries and store separately.

• Do not store the device in high temperature or humidity environments, in flammable or

combustible areas, or where a strong electromagnetic field is present.

• This device is CE certified.

#NAS100075; r. AA/78827/78827; en-US 2

FCC Compliance

This equipment has been tested and found to comply with the limits for a

Class B digital device, pursuant to part 15 of the FCC Rules. These limits are

designed to provide reasonable protection against harmful interference in a

residential installation. This equipment generates, uses, and can radiate radio

frequency energy and, if not installed and used in accordance with the instruc-

tions, may cause harmful interference to radio communications. However,

there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television recep-

tion, which can be determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one or more of the following

measures:

1. Reorient or relocate the receiving antenna.

2. Increase the separation between the equipment and receiver.

3. Connect the equipment into an outlet on a circuit different from that to

which the receiver is connected.

4. Consult the dealer or an experienced radio/TV technician for help.

WARNING

Changes or modifications not expressly approved by the party responsible for compliance

could void the user's authority to operate the equipment.

#NAS100075; r. AA/78827/78827; en-US 3

Product Description

4.1 Meter Description

1. Vane anemometer with temperature sensor

2. Backlit LCD (detailed below)

3. Function buttons (detailed below)

4. Tripod mount

5. Battery compartment

4.2 Function Buttons

Power / Bluetooth button

Long press to switch the device on. Short press to switch off.

With the meter powered, long press to switch Bluetooth on/off.

Short press to switch the meter off directly from the Bluetooth mode.

MAX/AVG button

Short press to cycle through MAX/AVG readings. MAX/AVG memories

are cleared each time meter power is cycled.

Data Hold / Backlight button

Short press to freeze/unfreeze the displayed reading. HOLD will display

when data hold is active.

Long press to switch the LCD backlight on/off.

#NAS100075; r. AA/78827/78827; en-US 4

Product Description

Unit of Measure button

Short press to select air velocity units: m/s, km/h, ft/min, mph, knots.

Long press to toggle the temperature units: ℃/℉.

APO ON/OFF With the meter on, long press the power and (H) buttons to switch APO

on/off. The APO symbol is displayed when APO is enabled. APO is

reset each time the meter power is cycled.

4.3 Display Symbols

1. Maximum reading

2. Average reading

3. Data Hold mode

4. Low battery symbol

5. Air Velocity measurement and units

6. Temperature reading and units

7. Bluetooth active

8. Auto Power Off (APO) symbol

9. Beaufort scale abbreviation

10. Beaufort measurement scale (1 to 12)

#NAS100075; r. AA/78827/78827; en-US 5

Operation

5.1 Powering the Meter

The meter operates on three (3) 1.5 V (AAA) batteries, installed in the rear

compartment.

Long press the power button to switch the meter on. Short press the power

button to switch the meter off. If the meter does not switch on, check the bat-

teries for proper orientation.

When the low battery symbol appears on the display, replace the batteries

immediately to ensure accurate readings.

5.2 Auto Power Off (APO)

The meter switches off automatically five (5) minutes after the last button

press.

The default mode for APO is ON (the APO symbol on the display indicates

that APO is enabled).

To switch the APO function off, with the meter switched on, long press the

power and data hold (H) buttons. The APO symbol will switch off, indicating

that the function is disabled. APO is reset each time the meter’s power is

cycled.

Repeat this process to switch APO back on manually.

5.3 Taking Measurements

1. Long press the power button to switch the meter on.

2. Hold the meter with the vane positioned in the flow of air. Allow the air to

enter the vane from the back of the meter. The meter can also be tripod

mounted.

3. Read the velocity measurement on the top row of the LCD. The air temper-

ature reading is shown on the bottom row.

4. The Beaufort scale readings (1 to 12), are represented in the text boxes

on the left side of the LCD.

5. If an air velocity or air temperature measurement is outside the specified

range, OL will appear on the display in place of a typical reading.

6. Short press the power button to switch the meter off.

#NAS100075; r. AA/78827/78827; en-US 6

Operation

CAUTION

Do not touch or otherwise obstruct the sensor area.

Do not allow liquids to come in contact with the sensor.

Avoid overly dusty environments.

Magnetic induction can affect the sensor’s ability to operate correctly. Keep the sensor

away from magnetic fields.

5.4 Changing Measurement Units

To step through the air velocity units menu, short press the UNIT button. The

air velocity units are m/s (meters per second), km/h (kilometres per hour), ft/

min (feet per minute), mph (miles per hour), and knots.

Long press the UNIT button to toggle the displayed temperature units ℃/℉.

5.5 Data Hold Function

Short press the Data Hold (H) button to freeze/unfreeze the displayed read-

ings. While Data Hold is active, HOLD will appear on the LCD.

5.6 LCD Backlight

Long press the backlight button to switch the display backlight on or off.

Excessive use of the backlight will shorten battery life.

5.7 MAX/AVG Readings

When the device is switched on, it begins tracking the highest (MAX) and

average (AVG) readings.

Short press the MAX/AVG button to step through the MAX/AVG memories.

MAX is shown when the maximum reading is displayed and AVG is shown

when the Average reading is displayed. The memories are cleared each time

the meter power is cycled.

Press the MAX/AVG button again to exit this mode (MAX and AVG symbols

are both off when you exit).

#NAS100075; r. AA/78827/78827; en-US 7

Operation

5.8 Bluetooth Operation

Long press the Bluetooth button with the meter on, to switch Bluetooth on

or off. This communication symbol is shown when Bluetooth is on.

The Bluetooth utility allows you to remotely monitor readings on an iOS or An-

droid smart device using the Extech ExView mobile app designed for use with

this meter.

Download the mobile app from the App Store for iOS devices or from Google

Play for Android devices. Instructions for mobile app use are available from

the ExView product page on the Extech website (link below).

http://www.extech.com

Switch APO off when using Bluetooth by pressing and holding the power

and Hbuttons for 2 seconds (the APO symbol will switch off). This will pre-

vent the meter from automatically switching off while you are logging data or

monitoring readings in real time on your smart device.

#NAS100075; r. AA/78827/78827; en-US 8

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