OPERATION MANUAL

RS232

INTEGRAL VANE

DIGITAL ANEMOMETER

Model:8903/8904/8906

Model:

8903

8904

8906

Congratulations on your purchase of this Integral vane anemometer.

The meter features versatile functions, use it to check air velocity FPM (Feet per minute) and CFM (Cubic feet per minute) in residential , light commercial and standard commercial systems.

Thank you for selecting the meter.

Please read this operation manual throughly before operation.

This meter has many user-friendly features, all the features are accessible through the keypads.

Please contact the store or the place you purchased for the rest models you might interested in.

The meter is most ideal for HVAC/R technicians measuring Heat / Ventilation

/ Air conditioning / Refrigerating wind flow and temperature.

CAUTION: Objects strike the fan may

damage the meter.

Model:

Knot, MPH,

KM/H

Air Flow

Volume

AZ8903

AZ8904

AZ8906

No

Yes

Yes

1

No

No

Yes

FEATURES

A. Measuring Air Velocity (Single point)

Feet per Minute (FPM).

B. Continuous Moving Average.

C. MIN/MAX/AVG reading on a single

point.

D. Air Velocity average for multiple

points ( 8904.8906 model only).

E. Non Sleep Mode(Bypass auto power

off).

F. Default setting ( Imperial/ Metric)

G. RS232 interface setting.

H. Auto power off function.

I. FTM , MPH , KNOT unit selectable

(8904.8906 model only).

J. Direct measuring of air flow

(Single point) CFM ( 8906 only).

K. Obtain air flow (CFM) average

for multi-point ( 8906 only).

Typical Measurement a) Please place the meter in the

airstream. Make sure that the

airstream and the sensor

are aligned as shown ( 20

degrees maximum).

20 o b) 3 seconds for the

reading to stabilize .

20 o

Rear side

2

FRONT PANEL DESCRIPTION

Model:8903

HOLD

AVERAGE

MULTI-POINT

MIN/MAX REC

SINGLE-POINT

Model:8904

O N-O /RE

SET

F EE AR

AF

IT

LO

Y

W

AV RAG

ON T

S L-M

K

IL

- N

/H

T

MIN/M

AX REC vel

F LO

W

Ho ld ft /m m/s m f

2

2

MI

N REC

MAX

AV

G

ON-OFF

RESET

HOLD

AVERAGE

MULTI-POINT

SEL -MIL/H

- KN OT

MIN/MAX REC

SINGLE-POINT

Model:8906

ON-OFF/RESET MODE-VELOCITY

FREE AREAFLOW

HOLD

AVERAGE

MULTI-POINT

SEL- MPH

- KNOTS

MIN/MAX REC

SINGLE-POINT

BUTTON / DISPLAY

1.ON/OFF- RESET. Power ON/OFF.

Press with HOLD key to set non-sleep

mode.

2.HOLD. Freezes the reading.

3.AVERAGE MULTI-POINT.

4.MN/MX RECORD SINGLE POINT

5.SEL:MIL/H (MPH) ,KNOT. unit

selectable .

(Model:8904 & 8906 only)

6.MODE VELOCITY, FREE AREA ,

FLOW. (Model:8904/8906 only)

Air volume measurement .

3

INDICATORS

1.vel. Air velocity measurement.

2.FLOW. Air Flow/Air volume.

3.AREA. Free area default setting.

4.Hold. Freezes the reading.

5.ft/m.

Feet per minute.

Feet square.(imperial) meter square.(metric)

8.cfm. Cubic feet per minute.(imperial)

9.cms. Cubic meter per second.(metric)

10.C. Celsius unit.

11.F. Fahrenheit unit.

12.REC. Record and saved.

13.AVG. Average data

14.MIN. Minimum data

15.MAX. Maximum data

16. Primary readout-Numerical display

for Air Velocity/ Air Volume/Free

area digit

17. Secondary readout -Temperature

display or records number.

18. "-" Polarity indicator for negative

temperature.

19. Knots.

(KN)=1850 meters per hour

20. Mil/h. or 1.15 miles per hour

(Imperial) Miles per hour

21. Km/h. (Metric) Km/h Kilometer per hour ve l FLOW AREA Hol d PH Kno ts ft/m ft 2 m/ s m 2 mi l/h cf m km/ h cms

MI N REC

MAX AVG

4

A. MEASURING AIR VELOCITY

(SINGLE POINT) FEET PER

MINUTE (FPM)

1. Press the ON/OFF button to turn the

meter on. Meter will show full display

for initial 5 seconds. (See Fig.1)

2. Unit is ready for use when LCD display

shows "vel" at upper left corner and

temperature at lower right corner.

(See Fig.2)

Fig.1

vel FLOW AREA Hold PH Knots ft/m m/s ft

2 m

2 mil/h cfm km/h cms

MIN REC

MAX AVG vel

Fig.2

ft/m

B. CONTINUOUS MOVING AVERAGE

The meter has the ability to display continuous moving average for up to two(2) hours.

1. Turn the power ON .

2. Place sensor in front of air flow

source.

3. Press MIN/MAX record key once.

An "AVG" and "REC" in the lower left

corner of the display to confirm the

meter is in continuous moving average

measurement mode. The display

will update every second.

(See Fig.3) vel m/s

Fig.3

REC

AVG

5

C. MIN/MAX/AVG READING ON A

SINGLE POINT

To obtain MIN/MAX/AVG readings on a single point.

1. Power the meter ON.

2. Place sensor in front of air flow

source.

3. Press MIN/MAX REC SINGLE POINT

key. The unit will begin to record

the readings.The meter displays the

average velocity by default.(see Fig.3)

Each press of the MIN/MAX button

cycles the display through:

* Real-time readings.

* MIN velocity.

* MAX velocity.

* Back to AVG velocity.

4. To revert to normal measurement

mode or clear the current MIN/MAX

and average readings, you could turn

off the meter first and then turn it on

again or press and hold MIN/MAX key

until meter beeps twice, then release.

Note: Feet Per Minute (FPM) readings

can be converted to CFM readings

by following below instructions:

1. Press the HOLD button to store

the readings before moving the

meter away from an air flow

sources.

2. Press MODE key to enter area

setting (see page11 for the details

of area setting). After setting, press

MODE key again to convert the

FPM into CFM.

6

D. AIR VELOCITY AVERAGE FOR

MULTIPLE POINTS(8904,8906 only)

1. Turn the meter on and position the

vane at the first point to be measured.

soon as the first measurement is

completed press the HOLD key,(you

will hear a single beep), and release.

The display will show HOLD above

the reading. (See Fig.4) vel Hold vel Hold m/s m/s ll ll

Fig.4

Fig.4-A

2. Press the MIN/MAX key,(You will hear

a single beep), and release,(the

display will show a digit 1-8). This

number represents the point number

which has been recorded.(See Fig.4-A)

3. Repeat above procedure until all

desired points have been measured

and recorded. A maximum 8 points may

be recorded at one time.

4. Once all measurements have been

recorded, you could vel Hold

press AVERAGE m/s

key to view the

average air velocity

reading and the

number of points

which are recorded.

AVG

Fig.5

5. You could press HOLD key to revert to

normal measurement mode

6. To clear multi- point average memory,

press and hold next digit/multi point

average key until unit beeps twice,

then release.

7

E. NON SLEEP MODE (Disable auto

power off)

Power unit off; press ON and HOLD at the same time and then release ON only.

An "n" appears on the LCD then you can release the HOLD key. The instrument will remain on until the OFF button is pressed.(See Fig.6 )

Fi g. 6

F. HOW TO CHANGE THE DEFAULT

SETTING/IMPERIAL TO METRIC

Vice Versa(METRIC TO IMPERIAL)

The default measuring units can be changed by following the steps below.

The unit should be turned off before commencing.

1. Press and hold the AVERAGE key,

then press the ON/OFF key once to

turn the unit on. When the LCD o o

displays " ft/m,ms " and " C, F"

realease the AVERAGE key.(Fig.7)

2. To choose the metric units, pressing the

HOLD key. The LCD should display " o

m/s, C". (See Fig.8)

Fi g. 7 m/s ft/m m/s

Fi g. 8

8

To choose the imperial units, pressing the

AVERAGE key. The LCD should display ft/m

Fig.9

3. Press the MIN/MAX REC key, the LCD

should display "S" (See Fig.10) .

Then press the HOLD key. The LCD

display 2400 or 1200 (pre-setting).

(If Baud rate change is needed, please

refer to step G.1) (See Fig.11)

Fi g. 10

Fig.11

.

4. Press the MIN/MAX REC key again,

the LCD should display "S" again.

(See Fig.10) .Then press the HOLD

key, the LCD will revert to a normal

measurement display. The default

setting is now completed.(See Fig.12) vel m/s

Fig.12

9

G.SETTING THE RS232 OUTPUT

(Optional accessory)

1. Following Step F.2, you will see a

"2400" (default) number on the screen.

The 2400 is the default setting of Baud

Rate for RS232 output. You can

change the setting to "1200" by

pressing HOLD Key and change the

setting back to "2400" by pressing the

AVERAGE key. (See Fig.13)

Fig.13

2. Please remember to save your

changes by pressing the MIN/MAX REC

key. An "S" displays on the LCD.

(See Fig.10).

Press the HOLD key to confirm and

save the changed value. The meter

will return to air velocity mode

automatically.

3. Plug the earphone jack of the cable

VZRS232M into RS232 socket on the

meter and connect 9-pin D-sub to the

computer's COM1 or COM2. Press

ON key to start measurement. The

length of the cable VZRS232M is 2M.

RS232 SOCKET

ON-O

F / F RESET

F E RF VEL O ITY

EA L O W

H O D

AR V E A

MU LTIPN -O

I T S EL-MIL

-

KN

/H

O T M N/

SING

MAX R

C

L -P O

E

INT

MIN

REC

A AV G v el

W E

Ho ld

PH K n o s ft/m m ft m k il/h m/ h c c

10

H. AUTO POWER OFF

The unit will turn off automatically after

20 minutes to save the battery. This will be preceded by 3 beeps.

I. MEASURING ft/m , MPH, Knot (Km/

Hour) (model 8904,8906 only)

In imperial , press SEL :.MPH . KNOT

Key, the reading will change from ft/m,

mil/h, knot in turns. In metric, press SEL

:.MPH. KNOT key, the reading will change

from m/s , km/h, knot in turn .

J. DIRECT MEASURING OF AIR

FLOW (SINGLE POINT) CFM

(model 8906 only)

Air Velocity measurement is calculated by multiplying the air velocity readings by the free area dimensions. Free area is published by the grill and register manufacturer you are servicing. You must first determine the free area of the air source before entering it into the meter.

AREA ft

2

Fig.14

1. Power unit on

2. Press MODE once. LCD will display

"AREA" and "1.111" will appear

(See Fig.14). The first digit will flash.

3. Press the HOLD key to increase the

number.

4. Press the AVERAGE key to advance

to next number. Follow Step 3 and

repeat to input the free area size.

5. Press the MODE key once all digits

have been entered. The word "flow"

will appear.

11

The meter is now ready to measure air flow(CFM).

K. TO OBTAIN AIR FLOW (CFM)

AVERAGE FOR MULTIPOINTS

(model 8906 only)

Simply complete steps 1~4 in D. Once all the multi-point average is determined:

1. Press MODE button once and confirm

correct free area setting is locked into

instrument. (if free area setting must

be adjusted make necessary changes

now.)

2. If free area setting is correct press

MODE button again to enter air flow

mode.

3. Unit will now display average air flow

reading and number of points measured.

L. MIN/MAX/AVG AIR VOL. READING

ON A SINGLE POINT (8906 only)

To obtain min/max/avg air volume readings on a single point, power the meter on, select the mode as FLOW and the place the sensor in front of the air flow source.

Press MIN/MAX/REC SINGLE POINT key, the unit will begin to record the reading. Press MIN/MAX key to read the real time value/MIN/MAX/AVG in turns.

Long press MIN/MAX key to clear the average readings.

The meter's free area dimension has been set to 1.111 square feet, a most commonly used free area dimension in the U.S.A. If you want to measure the air flow for a single point without changing the area dimension, please power on the

12

meter, position the fan and then press the

MODE key twice, you will be into the air flow(CFM) mode and the air flow(CFM) displayed is equal to the current air velocity reading (FPM x FREE AREA =

CFM) times the 1.111 square feet.

We would suggest to set the free area dimension before you start measuring the air velocity so after you measure the air velocity, you can jump to the air flow mode to view the cubic feet per minute without further changing the free area dimension.

Cubic equations:

Units Conversion Table:

1 m/s=

1 ft/min=

1 knots=

1 km/hr=

1 mph= m/s

1

0.00508

0.5144

0.2778

0.4464

ft/min

196.87

1

101.27

54.69

87.89

knots

1.944

0.00987

1

0.54

0.8679

1 m/s=

1 ft/min=

1 knots=

1 km/hr=

1 mph= km/hr

3.6

0.01829

1.8519

1

1.6071

mph

2.24

0.01138

1.1523

0.6222

1

Note:

On initial start up, the unit will show full display as fig.15 vel FLOW AREA although these features are only

Hold PH Knots ft/m ft 2 m/s m 2 mil/h cfm km/h cms available on models

8901, 04 and 06.

MIN REC

MAX AVG

13

Fig.15

TROUBLE SHOOTING

? LOW BATTERY

When the reading of display is flashing, or no display , please change the 9 volt battery in the meter .

Replace battery procedure:

Remove the screw from the lower back of the meter. Lift the cover out and remove the battery .Reverse the process to install a new battery and replace the cover .

? E6

Indicates the related circuits or parts of thermistor are failed. Send them back to the store you have bought for repairing.

? SENSOR'S FAN WILL NOT TURN

Indicates the sensor fan is damaged , purchase new sensor probe .

MATERIAL SUPPLIED

This standard package contains:

1.The meter x 1

2.Battery x 1 (9.0 volt)

3.Operation manual x 1

4.Hard carry case x 1

Optional accessory: a) RS232 software CD-R.

b) D-sub connector.

14

GENERAL SPECIFICATION

SPECIFICATIONS

Resolution

Accuracy

Airflow Range

80-5900 ft/min

0.4-30 m/sec

1

0.01

o

0.1

Temperature

+14 F to 122 F 0.1

Battery Life 100 Hours

(2% of reading

+0.2 m/s)

Display Type LCD

Display Size 37mm x 42mm(1-1/4" x 1- 5/8")

Max Reading 9999

Dimensions 183mm(L)x76mm(W)x45mm(D)

Fan Diameter 70mm(2-7/8")

RS232 OUTPUT FORMAT TXXX.XF, VXXXXFTM

TXXX.XC, VXXXXMPS

AUTO POWER OFF Approx. 20 minutes

DATA HOLD

RS232 OUTPUT:

The meter can link with personal computer to capture on-line datas

,display air velocity records with real-time output, you can retrieve file , save the datas for operating data analysis, records statistic ,multi-files display in the screen,

....versatile functions for your choice.

15

Connection procedures:

1.Plug the optional accessory RS232

cable onto the DC jack port ( at the

right side of the meter)

2.Instert the D-sub 9P type connector

onto computer's Com.1 or 2 port or....

3.Start to set up RS232 software by

inserting the CD-ROM or Floppy

diskette.

4.When installing the RS232 software

,please follow the operation manual

procedure in the software package.

WARRANTY

The meter is warranted to be free from defects in material and workmanship for a period of one year from the date of purchase. This warranty covers normal operation and does not cover battery , misuse , abuse , alteration , tampering , neglect , improper maintenance , or damage resulting from leaking batteries .

Proof of purchase is required for warranty repairs . Warranty is void if the meter has been opened .

16

RETURN AUTHORIZATION

Authorization must be obtained from the supplier before returning items for any reason . When requiring a RA (Return

Authorization) , please include data regarding the defective reason, the meters are to be returned along with good packing to prevent any damage in shipment and insured against possible damage or loss .

CE CERTIFICATION

The meter conforms to the following

standards:

* EN 50081-1/1992: EN 55022

* EN 50082-1/1997: (EN 61000-4-2/-3/-8

,ENV 50204)

, the meter complies with the essential protection requirements of Council

Directive 89/336/EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility.

17

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