General DAF800 Manual de usuario

MINI DIGITAL AIRFLOW METER

USER’S MANUAL

DAF800

Please read this manual carefully and thoroughly before using this product.

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Key Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 –3

What’s In the Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Setup Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Install Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 –6

Measuring Real-time Air Speeds. . . . . . . . . . . . . . . . . . . . . . 4 –5

Recording and Displaying Maximum and Minimum Speeds

. . 5 –6

Speci ications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Maintenance Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Warranty In ormation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 –8

Return or Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

INTRODUCTION

Thank you for purchasing General Tools & nstruments’ DAF800 Mini Digital

Airflow Meter. Please read this user’s manual carefully and thoroughly before

using the product.

The DAF800 is an inexpensive one-piece vane anemometer that can accurately

measure airflow speeds in ducts and at input and output grilles of HVAC/R

systems.

KEY FEATURES

• Five available air velocity units: ft./min, m/sec, kmph, mph, knots

• Low-friction ball vane wheels provide high accuracy at all air speeds

• Min/max memory + data hold

• 10-minute Auto Power Off (disabled during Min/Max recording sessions)

• Small and light enough for one-handed operation

• ncludes wrist strap

• CE and RoHS approved

• 1 year limited warranty

WHAT’S IN THE BOX

The meter comes in a white box along with this user’s manual. A “9V” battery

to power the unit is

not

included.

PRODUCT OVERVIEW

The figure below shows all controls and components on the front of the meter

as well as the location of the battery compartment, which is accessible from

the back of the unit.

A. Vane sensor

B. LCD

Power

button

Hold

button

Max./Min.

button

Uni

button

G. Wrist strap

H. Battery compartment

(on back)

SETUP INSTRUCTIONS

INSTALL BATTERY

To open the battery compartment, turn the meter over and use a small Phillips-

head screwdriver to loosen and remove the single screw securing the battery

compartment cover. Plug a “9V” battery into the wired socket inside the

compartment. The terminals of the battery and the socket mate in only one

way, with the smaller male terminal plugging into the larger female terminal.

Secure the battery compartment by replacing its cover and reinstalling and

tightening the Phillips-head screw.

Complete setup by carefully removing the plastic film protecting the LCD.

OPERATING INSTRUCTIONS

MEASURING REAL-TIME AIR SPEEDS

To begin, press the front-panel

Power

button. The meter will respond by

sounding a single beep. Then press the

Uni

button below it one or more times

to choose from among five widely used air speed units. The options are (in the

button-press sequence):

•

Km/h

(kilometers per hour)—the factory default unit

•

M/S

(meters per second)

•

fpm

(feet per minute)

•

mph

(miles per hour)

•

Kno

(knots)

The meter will “remember” your last selection when it is powered off and will

resume using that unit upon restart. So if you always use the same unit, you

will never have to press the

Uni

button again.

To extend battery life, when operating in real-time mode the DAF800 will

automatically power itself off following any 10-minute period in which no front-

panel button is pressed. The meter will sound two beeps twice when this Auto

Power Off (APO) function is activated. The APO function is disabled when

operating in Min/Max recording mode (see next section).

To make a measuremen

, position the vane at the top of the meter

perpendicular to the source of air or wind. Allow time for the reading to

stabilize. t makes no difference whether the front of back of the vane faces

the wind or air flow.

To hold any reading

(“freeze” the display), press the

Hold

button. To release

the hold and resume displaying real-time values, press the

Hold

button again.

This function is very useful for making measurements in low light or when the

source of air or wind is above your head, below your knees or around a corner.

You can make a measurement, hold it, and then read the display up to

10 minutes later after positioning the LCD at eye level.

RECORDING AND DISPLAYING

MAXIMUM AND MINIMUM SPEEDS

The DAF800 can record the maximum and minimum (fastest and slowest) air

speed values measured over a user-selectable period of time. The Min/Max

recording function is handy for noting fluctuations in the output of a fan over

time.

During these recording sessions, the meter’s Auto Power Off function is

disabled to enable recording for longer than 10 minutes. The only limit on

recording duration is remaining battery life.

To begin recording Max and Min readings

, first position the vane in the flow of

air or wind and then press the

Max./Min.

button on the right side of the front

panel. f you begin recording before positioning the vane, your Min. reading will

always be recorded as

0.0

(zero).

Pressing the

Max./Min.

button will cause the term

REC

to appear at the top left

of the LCD. The meter will continue to record Max and Min values—but display

real-time values—until you press the

Max./Min.

button again.

To display he maximum air speed

measured during the current recording

session, briefly press the

Max./Min.

button. (

Do no

press and hold the button;

this will stop recording). The LCD will display the maximum value below the

term

Max

on the top line. 5

To display he minimum air speed

measured during the current recording

session, briefly press the

Max./Min.

button again. (Again, do not press and

hold the button.) The LCD will now display the minimum value below the term

Min

on the top line.

Once you have pressed the

Max./Min.

button with

REC

on the top line, you

cannot resume displaying real-time readings without ending the recording

session.

To end the recording session, press and hold the

Max./Min.

button. This will

cause the

REC

term to disappear. The meter will then resume displaying

real-time air speed measurements.

SPECIFICATIONS

Measurement Ranges 1.4 to 108 km/hr, 0.4 to 30m/sec,

80 to 5910 fpm, 0.9 to 67 mph, 0.8 to 58.3 knots

Measurement Accuracy ±3% of full-scale value below 20m/sec;

±4% of full-scale value above 20m/sec

Measurement Resolutions 0.1 km/hr, 0.1m/sec, 1 fpm, 0.1 mph, 0.1 knots

Display Size 1.3 in. (33mm) diagonal

Digit Height 3/8 in. (10mm)

Auto Power Off Trigger 10 minutes of front-panel inactivity (disabled in

Min/Max recording mode)

Current Consumption 17mADC

Dimensions 6.15 x 2.36 x 1.29 in. (156 x 60 x 33mm)

Weight (including battery) 5.6 oz. (159g)

Power Source 1 “9V” battery (not included)

MAINTENANCE TIPS

When the icon appears in the upper left corner of the LCD, it’s time to

change the meter’s “9V” battery (although measurements will remain valid for

several hours after the icon first appears). To change the battery, follow the

Setup nstructions on p. 4.

Remove the battery if you do not expect to use the meter for an extended

period of time (months or years).

Do not drop or disassemble the meter or immerse it in water.

To clean the housing or LCD, use a dry or damp cloth. Avoid using chemical

cleaners.

WARRANTY INFORMATION

General Tools & nstruments’ (General’s) DAF800 Mini Digital Airflow Meter is

warranted to the original purchaser to be free from defects in material and

workmanship for a period of one year. Subject to certain restrictions, General

will repair or replace this instrument if, after examination, the company

determines it to be defective in material or workmanship. The warranty period

begins on the date of purchase. You are encouraged to register your product

online. General will extend your warranty an additional 60 days if you register at

www.generaltools.com/ProductRegistry.

This limited warranty does not apply to damages that General determines to be

from an attempted repair by non-authorized personnel or misuse, alterations,

normal wear and tear, or accidental damage. The defective unit must be

returned to General Tools & nstruments or to a General-authorized service

center, freight prepaid and insured.

Acceptance of the exclusive repair and replacement remedies described herein

is a condition of the contract for purchase of this product. n no event shall

General be liable for any incidental, special, consequential or punitive damages,

or for any cost, attorneys’ fees, expenses, or losses alleged to be a

consequence of any damage due to failure of, or defect in any product

including, but not limited to, any claims for loss of profits.

extension to your warranty.

RETURN FOR REPAIR POLICY

Every effort has been made to provide you with a reliable product of superior

quality. However, in the event your instrument requires repair, please contact

our Customer Service to obtain an RGA (Return Goods Authorization) number

before forwarding the unit via prepaid freight to the attention of our Service

Center at this address:

Remember to include a copy of your proof of purchase, your return address,

and your phone number and/or e-mail address.

Speciﬁcations subject to change without notice

NOTICE - E ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS.

MAN# DAF800

8/16/13

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

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