Omega Products HHF92A Installation Manual

HHF92A

Digital Anemometer

M3665/1200

A. MEASURING AIR VELOCITY (SINGLE POINT)

FEET PER MINUTE (FPM)

1.

Press the ON/OFF button and turn meter on. Meter will

full display when first powered on.

2. Unit is ready for use when LCD display shows “vel” at upper
left comer and temperature at lower right comer.

B. CONTINUOUS MOVING AVERAGE
The

meters displays continuous moving average for up to two ‘(2) hours.

1. Power unit on.

2. Place sensor in front of air flow source.

3. Press

MIN/MAX

record key and unit will begin to display moving average. The Meter will

record the reading every second.

4. Press HOLD prior to moving instrument away from air flow source to store

d

show

rz;.

dings.

MIN/MAX/AVG

c.
To obtain

MIN/MAX/AVG readings on a single point.

READING ON A

SINGLE

POINT

1. Power unit on.

2. Place sensor in front of air flow source.

3. Press

MR@lAX REC SINGLE POINT’ key. The unit will begin to record readings.

4. Press HOLD prior to moving instrument away from air flow source to store readings.
a). Press
b). Press
c). Press
d). Press
e).

MIN/MAX

MIN/MAX
MIN/MAX
MIN/MAX

.Press

MIN/MAX key again to display

5. To clear the current

MN/MAX

key until unit beeps twice, then release.

D. AIR VELOCITY AVERAGE

key once the screen displays AVG velocity readings under

key again AVG disappears.
key again to display
key again to display MAX velocity readings.

MIN/MAX

average readings, turn off the power or press and hold

FOi

MULTIPLE

MXN

velocity readings side by

currentvelocity.

POINTS

REC.

REC.

1. Power the unit on and position the vane at the first point to be measured.

2. As

;soon

as the first measurement is completed press the HOLD key until you hear a single

beep, then release. The display will show Hold above the reading.

3. Press the

MWMAX

key, When you will hear a single beep release the button. The

display

will show a digit (l-8). This number represents the point that is being recorded.

4. Repeat this process until all desired points have been measured and recorded,

Amaximum

of 8 points may be recorded at one time.

5. Once all measurements have been recorded press AVERAGE key. The unit will display the
average air velocity reading and number of points measured.

1

E. NON SLEEP MODE

(BYPASS AUTO POWER

1, Power unit off.

QFF)

. .

2. Press ON and HOLD at the same time and then release ON only.
can

3. An “n” appears on the LCD then

VW

release the HOLD key. The instrument will remain

an until the OFF button is pressed.

.‘_

_i

.)

;. :

..‘.,

‘;‘, , _

,* &

.” f

7,<;

‘l,f

*

r;‘,

:

.

-1

:

4

.“,

-. .

F.

CHANGING THE DEFAULT

SEITlNG/IMPERlAL

The default setting for the measuring unit of air velocity is
temperature is
steps:

1 .

Press ON and AVERAGE at

Release ON first, then average. A LCD will show

“F.

You can change the measuring units to

.

-.

thesame time.

SmalLprinting

TO METRIC

feet/n&t.

meter&c

and the unit of

and

_

“ft/m”(default) on the

of

“C

by following these

_.

i.-..

:

upper right comer and an “OF” on the lower right comer.
a). Press HOLD key to change the measuring units to metric system; press AVERAGE key

for imperial measuring units.

b). Press

MIN/MAX

REC key and an

“9

will show on the LCD. Press HOLD to confirm and

save the changed value. At this time, the baud rate “2400” (default appears on the screen

.<

t,!’

I0

‘..

4,

. ,

.

,’

tobefollowedbySteplforchangingRS232output(ifnecessaxy).

:

. .

G. AUTO POWER OFF

w ill

The

un it

turn off automatically after

;”

:‘,,

. , . .

*

20

minutes to save the battery. This will be preceded

.a

_f’.

by 3 beeps. Press the ON key and the unit will resume operation.

H. MEASURING

ft./m,

MPH, KNOTS,

:

+’

”

“

‘,”

;

‘_..J;”

,:r;,..>,*.:::

,,

“’

*’

T ’;

‘j*‘?”

<.

In imperial:

mil/h

1. Press the
knots in turn.

._.

ft./min

to SELMIL/H-KNOT Key and the reading will change from

to

.’

In metric:

2. Press the

SEL:MIL/H.KNOT

tum.

I

I.

DIRECT

MEASURlNG

Key and the reading will change from m/s to km/h to knots in

.

OF AIR

FLOW (SINGLE

POINT).CFM

’

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.

1.

Power unit on

2. Press MODE once (you will hear one beep). Meter will display “AREA” in upper case
lettering and “1.111

”

will appear.The first digit will

be flashing

.

3. Press the HOLD key to increase the number.

4.

Press the AVERAGE key to advance to next number. Follow Step 3 and repeat.

5. Press the MODE key once all digits have been entered. The word

“flow”will

appear.

The meter is now ready to measure air flow

(CFM).

To clear

memory of current multi

-

point

average readings, press and hold AVERAGE key until unit beeps twice, then release. Unit must

velocity/FPM mode in order to clear current average readings.

be in

2

J. OBTAINING AIR

l-4

Complete steps

in section D

FLOW(CFM)AVERAGE

FOR MULTIPOINTS

,

Once all multipoint averages are determined:

1. Press MODE key once to confirm that the correct free area setting is locked into the
instrument. (if free area needs adjustment, make necessary changes now).

2. Once

free area setting is correct, press MODE key again to enter air flow mode.

3. Unit will now display average air flow reading and number of points measured.

The meters free area dimension has been set to 1.111 square feet which is the most commonly
used free area dimension

in the

USA. If you want to measure the air flow for a single point
without changing the area dimension: 1. Power the unit on and position the fan 2. Press the
MODE key twice, You will then be in the air

(FPM

to the current air velocity reading

x Free Area =

flow(CFM)

mode. The air flow displayed is equal

CFM)

times the 1.111 square feet.

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

:

TROUBLE SHOOTING

LOW

BATTERX

Indicates battery is low. Please replace with a 9 volt battery.

‘.”

NOTE:
On initial

.

Specifications:

Air Flow Range:
80-6900

0.435

startup the unit will display flow, area,

ft/min

m/set

_

Resolution

1

0.0 1

Temperature:

+14”F

-10°C to 50°C
Battery Life:

122’F 0.1

to

100

Hours

0.1

Display Type: LCD
Display

Size:

1

X

x 1

w

(37 x

42mm)
Maximum Reading: 9999
Dimensions(LxWxD):7~x3xlX ’(183x76x45mm)
Fan Diameter: 2

v(7Omm)

ft/mph,

cfm, km/h and knots,

ans.mil/h,

Accuracy

+3%FS
*3YoFS

&.O”F

. .

+l.O”C

Auto Power Off: 20 minutes

Data Hold

3

LA

1180

(0)20

3472121

&nclux:

ISSS,

733 01

(0)69

6311899

ml-66342

hpin, 78190

621400

Fnecc:

D75392

26,

9398.0

Germany:

Drive, River

Manchester

hiam,
61777

6611&l(O)1

Europe:

Ol!UI

0800+&%2

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?z!inz

www.omega.com

Sewicing

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Cm&d

One
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Tel:
e-mail:

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Lwal

Tel: (514)
c-mail:

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Omega

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(203)

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