Extech Instruments AN400 Manual de usuario

User's Guide

Cup Thermo-Anemometer

Model AN400

AN400 V3.0 12/06

Introduction

Congratulations on your purchase of the Extech Cup Thermo-Anemometer. The AN400

measures air velocity in five units of measure: feet per minute (ft/min), meters per

second (m/sec), miles per hour (MPH), kilometers per hour (km/hr), & nautical miles per

hour (knots). The low-friction cup vane freely rotates in response to air flow. An internal

thermistor allows the AN400 to measure air temperature in Centigrade or Fahrenheit

units. This meter is shipped fully tested and calibrated and with proper use will provide

years of reliable service.

Meter Description

1. Cup vane

2. Temperature sensor

3. POWER: On/Off

Logger: Store data with “REC” in display

▲: Step through and recall stored data

4. HOLD: Freeze display

Unit: Select measured units

5. REC: Enter Max/Min or Logger mode

oC/oF: Select measured units

▼: Step through and recall stored data

6. LCD display

7. Battery compartment cap

AN400 V3.0 12/06

Operation

Connecting the Vane Cup

1. Place the cup vane on the top of the meter housing.

2. Rotate the top screw in a counter-clockwise direction

until the screw is secured.

Meter Power

1. Press the POWER button to turn the meter on. If the display does not switch on, check

that four AAA batteries are installed. To access the battery compartment, remove the

battery cover by rotating it in a counter-clockwise direction.

2. Press the POWER button to turn the meter off.

3. The meter is equipped with an AUTO POWER OFF feature. The meter automatically

shuts off after 10 minutes to conserve battery energy. To disable this feature, press the

REC button to enable the MIN/MAX function.

Measuring Air Velocity and Temperature

1. Hold the meter vertically and place the cup sensor in the air stream under test.

2. Read the Air Velocity and Temperature measurements directly on the LCD display.

Note: The temperature sensor is located in the upper right of the front panel. To avoid

affecting the temperature reading, hold the lower portion of the meter when making

measurements.

Selecting the Temperature unit of measure (oC/oF)

Press and Hold (>2 seconds) the REC/oC/oF key to toggle the temperature unit of

measure. The display will indicate the currently selected unit of measure.

Note: Temperature unit of measure cannot be changed if the Data Hold or Record function

is on.

Selecting the Air Velocity unit of measure

To change the unit of measure for Air Velocity measurement, press and hold (>2 seconds)

the HOLD/Unit button. The display will sequence through the measurement units. When

the desired unit of measure is displayed, release the button. The current setting will be

retained even after the meter is powered off.

Note: Unit of Measure cannot be changed if the Data Hold or Record function is on.

Data Hold

To freeze the LCD display, momentarily press the HOLD button. The 'HOLD' icon will

appear on the LCD and the reading will remain unchanged. Momentarily press the HOLD

button again to return to normal operation (the 'HOLD' icon will switch off).

AN400 V3.0 12/06

Record and Recall MIN / MAX Function

1. To begin capturing the Minimum (MIN) and Maximum (MAX) air velocity and

temperature readings, momentarily press the REC key. The “REC” icon will be

displayed.

2. Now, use the REC button to toggle the view from MIN to MAX and from MAX to MIN

readings. The ‘RECMAX’ or ‘REC MIN’ will appear along with the recalled reading for

convenience.

3. To delete the maximum or minimum value and record a new value, momentarily press

the HOLD button while in either “RECMAX’ or “REC MIN” mode.

4. To return to normal operation, press and hold the REC button until the “REC”, ‘MAX’,

and ‘MIN’ icons switch off.

Datalogging

Datalogging allows the user to store and recall up to 100 readings with the press of a button.

1. Momentarily press the REC button to display the “REC” icon in the display.

2. Press the Logger button to manually store a single reading into memory.

The location number of the reading will appear in the main display

(memory locations remaining will appear in the lower display) for 2

seconds and then the normal display will return.

3. To exit the datalogger, press and hold the REC button for >2 seconds. The

“REC” icon will disappear.

4. To recall the stored data, momentarily press the HOLD button to display the “HOLD”

icon.

5. Momentarily press the REC button to display the total number of data

points stored in memory. “ttL” will also appear in the lower display.

6. Use the ▲and ▼buttons to scroll through the memory locations to view

the logged readings. The “units” display will flash while in the recall mode.

7. The memory location will first appear in the display followed by the reading.

8. To exit the recall data function, press the momentarily HOLD button.

Note: The selected “unit of measure” icon will flash continuously when the meter is in recall

mode.

Clearing Stored Data

1. Press and hold the REC button while turning the meter on to clear memory.

2. The LCD will indicate “n” in the main display and “CLr” in the lower display.

3. Momentarily press the ▼button to display “Y” and “CLr”.

4. Press the HOLD/Unit button. When the LCD indicates “nuLL” and “CLr”, the memory

has been cleared.

AN400 V3.0 12/06



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

Maintenance

Battery Replacement

The AN400 is powered by four 1.5V AAA batteries. When the low battery icon

appears on the LCD or if the display does not switch on when the POWER button is

pressed, replace or install the batteries.

1. Twist off the battery compartment cap by rotating it counter-clockwise.

2. Replace the four AAA batteries observing polarity.

3. Replace the battery compartment cap.

Cleaning and Storage

Wipe the meter and vane with a damp cloth as needed. Do not apply abrasive, solvents, or

other cleaners to the surface of the meter or vane. Store with the battery removed and

avoid extreme temperature and humidity.

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 on 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 at 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 repair and calibration services for the products we sell. Extech also provides

NIST certification for most products. Call the Customer Service Department for information on

calibration services available for this product. Extech recommends that annual calibrations be

performed to verify meter performance and accuracy.

AN400 V3.0 12/06

Specifications

Circuit description Custom LSI microprocessor design

Display Dual function 9999 count LCD display

Measurement units m/s, km/h, ft/min, knots, mph, Temperature oC/oF

Data hold Freezes reading on the display

Sensor Structure Air velocity sensor: Cup vane arm with low-friction ball-

bearing design. Temperature sensor: Precision thermistor

Memory Recall Record and Recall Maximum (MAX) and Minimum (MIN)

readings

Data Logger Manual store/recall of up to 100 data points

Auto Power off After 10 minutes

Sampling Time Approx. 1 second

Water Resistance IP65

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

Operating Humidity Max. 80% RH

Power Supply 4 x 1.5V AAA batteries

Power Consumption Approx. 6.8mA DC (typical battery life: approx. 150 hrs)

Weight 0.4 lbs. (181g)

Dimensions Main instrument: 7.5 x 1.6 x1.3” (190 x 40 x 32mm)

Cup Vane: 5.3” (135mm) diameter

Air Velocity Range Specifications

Measurement Range Resolution

ccuracy

(of full scale)

ft/min (feet per minute) 144 – 6895 ft/min 1 ft/min ± (2% + 40 ft/min)

m/s (meters per second) 0.9- 35.0 m/s 0.1 m/s ± (2% + 0.2 m/sec)

km/h (kilometers per hour) 2.5 - 126.0 km/h 0.1 km/h ± (2% + 0.8 km/hr)

mph (miles per hour) 1.6 - 78.2 mph 0.1 mph ± (2% + 0.4 mph)

knots (nautical miles per hour) 1.4 to 68.0 knots 0.1 knots ± (2% + 0.4 knots)

Temperature Range Specifications

Range Resolution Accuracy

32oF to 122oF (0oC to 50oC) 0.1oF (0.1oC) ± 1.5oF (0.8oC)

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