Omega HHF-309 User guide

User’s Guide

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HHF-309

Mini Anemometer-Psychrometer

With CFM/CMM And Enthalpy

omega.com [email protected]

Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

Stamford, CT 06907-0047 USA

Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: [phone] Fax: [phone]
e-mail: [email protected]

For Other Locations Visit omega.com/worldwide

The information contained in this document is believed to be correct, but OMEGA accepts no
liability for any errors it contains, and reserves the right to alter specifications without notice.

MINI ANEMOMETER-

PSYCHROMETER WITH

CFM/CMM & ENTHALPY

USER’S MANUAL

HHF-309

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

TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 3

Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

What’s In the Package . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 5

Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Activate Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . 6 – 12

Measuring Air Speed and Temperatures . . . . . . . 7 – 9

Measuring Airflow Volume . . . . . . . . . . . . . . . . 9 – 10

Displaying Min/Max/Avg Air Speeds

and Airflow Volumes . . . . . . . . . . . . . . . . . . 10 – 11

Measuring Relative Humidity (RH) . . . . . . . . . . . . . 11

Measuring Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . 12

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 – 13

Maintenance Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

INTRODUCTION

Thank you for purchasing OMEGA’s HHF-309 Mini Anemometer­Psychrometer with CFM/CMM & Enthalpy.
Please read this user’s manual carefully and thoroughly before
using the product.

2

The HHF-309 is a one-piece vane anemometer-psychrometer that
can measure all parameters needed to install, test or fine-tune the
performance of an HVAC/R system.

KEY FEATURES

• Measures:
Ambient temperature
Dew Point and Wet Bulb temperatures
Wind Chill Index (WCI)
Relative humidity (RH)
Air speed
Airflow volume
Enthalpy

• All temperatures displayable in°F (default) or °C

• Five available air speed units: ft./min, mph, m/sec, km/hr, knots

• Airflow volume and Enthalpy readings available in Imperial or

metric units

• Min, Max and Avg session values for air speed and airflow

volume

• Large backlit dual readout LCD

• 5-minute Auto Power Off

• Small and light enough for one-handed operation

• Includes vane and sensor

Tripod mount

•

• CE and RoHS approved

• 1 year limited warranty

cap with wrist strap

3

WHAT’S IN THE PACKAGE

The meter comes in a blister pack with a “CR2032” button cell
pre-installed in the battery compartment. A hard copy of this
user’s manual is inside the blister card.

PRODUCT OVERVIEW

Fig. 1 below shows all controls, indicators and physical structures
of the unit, as well as the location of the battery compartment.

Fig. 2 shows all possible indications on the unit’s LCD.

Fig. 1. The controls, indicators and physical structures of the
HHF-309

A. Vane and sensor

protection cap
B. Vane
C. Temperature-humidity

sensor
D. LCD
E. Keypad
F. Battery compartment
G. Wrist strap

moun

ded tripod
ting hole

H. Threa

A

B

C

D

E

F

H

4

A. Low battery

A B C D

icon

B. Upper

readout

S

C. Air speed

mode

indicator

D. Airflow

volume

mode

indicator

Q

P

O
N

M

E. RH mode

indicator

F. Enthalpy

mode indicator

G. Air speed units

L

Fig. 2.
All possible display indications

H. RH unit
I. Enthalpy units
J. Area units
K. Lower readout
L. Area entry mode indicator
M. Dew Point mode indicator
N. Wet Bulb mode indicator
O. Wind Chill Index mode indicator
P. Airflow volume multiplier
Q. Airflow volume units
R. Air speed, airflow v

easurement HOLD indicator

S. M

olume session value indicators

E F

GR

H

I

J

K

5

SETUP INSTRUCTIONS

ACTIVATE BATTERY

1. Turn the meter over and use your thumbs or a coin to turn the
battery compartment cover on the back (Fig. 1, Callout F)
clockwise 30 degrees, in the direction marked OPEN.

2. Pull and discard the tab under the pre-installed battery.

3. Replace the battery compartment cover and turn it
counterclockwise 30 degrees until it snaps shut.

Complete Setup by carefully removi

D.

the LC

ng the plastic film protecting

OPERATING INSTRUCTIONS

To power on the HHF-309, press the red button. The LCD will
illuminate with the backlight on and show all possible display
indications for 2 seconds. The unit will then automatically enter
the measurement mode in which it was operating when it
powered off. The backlight will turn off after 15 seconds if no
front-panel button is pressed during that period. Pressing any
button begins another

To

power off the HHF-309, press and hold the button for at

least 2 seconds.
To change measurement mode, start by pressing the MODE button.

This will cause the icon of the current mode to begin flashing on
the top line. Then press the SET button one to three times, until the
icon of the mode you want begins flashing on the top line.

The figure below shows the four measurement modes in their
sequence of selection using the SET bu

15 seconds of backlight.

tton.

VEL

6

FLOW

RH BTU

When the icon of the mode you want appears, flashing, on the top
line, press the MODE button once to stop it from flashing. Doing
this will cause one or more measurement unit icons below to
begin flashing. Press the MODE button again to stop those icons
from flashing. This causes the meter to enter real-time
measurement mode for the chosen parameter (air/wind speed,
airflow volume, RH or enthalpy).

To hold any pair of measurements (“

freeze” the readouts),
press the HOLD button. To release the hold and resume displaying
real-time values, press the 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 5 minutes later after p

Why d

o you have only 5 minutes? To extend battery life, the

ositioning the LCD at eye level.

HHF-309 automatically powers itself off following any 5-minute
period in which no front-panel button is pressed.

MEASURING AIR SPEED AND TEMPERATURES

To make an air speed measurement, unsnap the vane and
sensor protection cap (Fig. 1, Callout A) and let it hang from the
unit by the wrist strap. Turn the vane at the top of the unit
perp

endicular to the source of air or wind. It makes no difference
whether the front of back of the vane faces the flow. The
measured air speed value will appear on the upper readout.
Allow a few seconds for the reading to stabilize.

The HHF-309’s factory default air speed measurement unit is
feet/minute (ft/m). To change the air speed unit, begin by
pressing the UNIT button. This will cause ft/m to begin flashing

e right side of the upper readout. Then, within 15 seconds

on th
(before the backlight extinguishes), press the SET button. This will
change the flashing ft/m term to mph, also flashing. Press the
SET button again and mph will turn to knots. Press it again to
change knots to m/s.

7

Press the SET button as many
times as necessary until the air
speed unit you prefer appears,
flashing, on the right side of the
upper readout. To save this unit,
press the UNIT button. The figure
at right shows the five available
air speed units in their selection
sequence.

When you press the UNIT button
to save your preferred air speed unit, °F—the HHF-309’s factory
default temperature measurement unit—will begin flas

ht side of the lower readout. To keep °F as the temperature

rig

hing on the

measurement unit, begin by pressing the UNIT button. This will
cause °F to stop flashing and the meter to resume displaying real­time air speed and temperature measurements. To change the
temperature unit to °C, press the SET button, followed by the
UNIT button to save the selection.

The HHF-309 will “remember” the air speed and temperature
units (as well as its operating mode and other selected units and
parameters

) in use each time it powers off and will resume
operating in that mode and with those units upon restart. So if
you always use ft/m and °F for air speed and temperature
measurements, you need not perform any of the above steps. And
if you always use the same air speed and temperature units (other
than ft/m and °F), you need on
onc

e. Unlike many instruments, changing the battery does not

ly perform the above procedure

reset all units to their factory default.
As mentioned earlier, the HHF-309 automatically begins

measuring and displaying ambient temperature upon startup.

To display other temperatures whose calculation includes the
effect of wind speed or humidity (Wind Chill Index, or Wet Bulb

and Dew Point temperatures, respectively), begin by pressing the

8

MODE button with the me er operating in air speed mode (with
VEL appearing on the top line of the LCD). This will cause VEL to

begin flashing. Then press the MODE button again. On meters that
have come fresh from the factory, this will cause the three terms
WCI, WET and DEW to appear, flashing, on the left side of the
LCD. Within 15 seconds (before the backlight turns off), press the
SET button as many times a
wan

t appears by itself, flashing, on the left side. Note that the

s necessary until the temperature you

temperature on the lower readout changes with each press of the
SET button. To save the temperature you want, press the MODE
button while its abbreviated term (WCI, WET or DEW) is flashing.

As with air speed units, the type of temperature you select and
save becomes the display default until you change

When

operating in Wind Chill Index mode, make sure the vane is

it.

perpendicular to the wind direction.

MEASURING AIRFLOW VOLUME

To enter airflow volume measurement mode, begin by pressing
the MODE button with the meter operating in air speed mode
(with VEL appearing on the top line of the LCD). This will cause
VEL to begin flashing. Then press the SET button. This will cause

the flashing term FLOW to replace

the flashing term VEL on th

e
top line of the LCD. To stop FLOW from flashing, press the
MODE button.

Note that the term AREA now appears at the left of the lower
readout. To calculate airflow volume, the HHF-309 must “know”
the area of the grille or duct through which air is passing. Before
entering that area, you should enter your preference for using the
metric or Imperial unit for airflow volume—cubic meters/minute

MM) or cubic feet/minute (CFM), respectively.

(C
To change CMM to CFM, begin by pressing the UNIT button. This

will cause CMM to begin flashing. Then press the SET button,
followed by the UNIT button to save the selection.

9

You can now measure the area of your grille and duct and enter
it into the HHF-309. The meter can accept any area from

2

to 99.9 ft2. Users of metric units must convert their cm

0.1 ft

2

measurements to ft2before entering them.
To begin, press the AREA button. This will cause the left (most

significant) digit on the lower readout to begin flashing. Press the
SET button as many times as necessary until the left digit matches
the left digit of your grille or duct area. Then press the AREA button
to save that digit. This will cause the second digit from the left to
begin flashing. Again, press the SET button as many times as
necessary until the second digit from the left on the display
matches the second digit from the left of your grille or duct area.
Press the AREA button to save that digit. Repeat the process for

e right (least significant) digit. To return to any digit to change its

th
value, press the AREA button once, twice or three times.

To me

asure the volume of air exiting a grille or duct, remove

the vane and sensor protection cap and enter airflow volume
mode (with FLOW appearing on the top line of the LCD). Turn the
vane at the top of the unit perpendicular to the source of air or
wind. It makes no difference whether the front of back of the vane

the flow. Allow a few seconds for the reading to stabilize.

faces
For airflow volumes less than 9999 CFM or CMM, the value on the

upper readout represents a true measurement. For airflow
volumes between 10,000 and 99,999 CFM or CMM, the indication
X10 below and to the left of the upper readout is a reminder to
multiply the value shown by 10 for a true measurement. For

ow volumes above 99,999 CFM, the indication X100 is a

airfl
reminder to multiply the value shown by 100 for a true
measurement.

DISPLAYING MIN/MAX/AVG AIR SPEEDS
AND AIRFLOW VOLUMES

The HHF-309 keeps track of the maximum and minimum (fastest
and slowest) and average air speed and airflow volume values

10

recorded over a measurement “session”—the period of time
during which you measure speeds at multiple locations and/or
speeds of multiple devices. The session begins when you power
on the HHF-309; it typically ends 5 minutes after you finish
making measurements with the activation of the APO function.

The value of being able to quickly determine the fastest and
slowest fans of a group, or the average of a group
be ob

vious.

of fans, should

To display the maximum, minimum or average air speed

during a measurement session,
briefly press the DISP button as
many times as necessary until the
label of the desired value (Max,
Min or Avg) appears at the left of
the LCD (Fig. 2, Callout R). The
figure at right shows the three
available session parameters in
their selection sequence relative to
real-time measurement mode.

MEASUR
HU

MIDITY (RH)

ING RELATIVE

To enter RH mode, press the SET button with FLOW flashing on
the top line of the LCD. This will change the flashing term to RH.
To stop RH from flashing, press the MODE button.

The HHF-309 will now display real-time RH values on the upper
readout and the current Wind Chill Index or Dew Point or Wet Bulb
temperature on the lower readout. To change the unit of
temperature measurement to or from °F or °C, press the SET
bu

tton, followed by the UNIT button to save the selection. To leave

the unit unchanged, press the UNIT button.

11

MEASURING ENTHALPY

Enthalpy is a measure of the amount of energy needed to change
the state of a substance from a solid to a liquid or from a liquid to
a gas. The most common application for the HHF-309’s enthalpy­calculating algorithm is measuring the enthalpy of vaporization of
air in an HVAC/R system duct.

To enter Enthalpy mode, press the SET button with RH flashing on
the top line of the LCD. This will change

top BTU from flashing, press the MODE button.

To s

the flashing term to BTU.

You can now enter your preference for using the metric or Imperial
unit for Enthalpy—kiloJoules per kilogram (KJ/kg) or British
thermal units per pound (BTU/lb), respectively. To change KJ/kg
to BTU/lb, begin by pressing the UNIT button. This will cause
KJ/kg to begin flashing. Then press the SET button, followed by
the UNIT button to

save the selection.

Selecting the Enthalpy unit will cause the default temperature unit
at the right of the lower readout to begin flashing. To change the
unit, press the SET button, followed by the UNIT button to save
the selection. To leave the unit unchanged, press the UNIT button.

To make an Enthalpy measurement, remove the vane and
sensor protection cap and enter Enthalpy mode (with BTU
appearing on the top line of the LCD). Turn the vane at the top of
th

nit perpendicular to the source of air or wind. It makes no

e u
difference whether the front of back of the vane faces the flow.
The measured Enthalpy value will appear on the upper readout.
Allow a few seconds for the reading to stabilize.

SPECIFICATIONS

Air Speed Measurement Range:

80 to 5910 ft./min (0.4 to 30 m/s)

Air Speed Measurement Accuracy:

±(3% of full-scale value + 40 ft./min (0.2 m/s))

12

Air Speed Measurement Resolutions: 1 ft./min (0.1 m/s)
Temperature Measurement Range: 32° to 122°F (0° to 50°C)
Temperature Measurement Accuracy:

±1.8°F (1°C) from 68° to 104°F (20° to 40°C);

±3.6°F (2°C) elsewhere in range
Temperature Measurement Resolution: 0.1°
Airflow Volume Measurement Range:

0 to 591,000 CFM (0 to 16,740 CMM)
Relative Humidity (RH) Measurement Range: 0 to 100%
RH Measurement Accurac

±3% from 2

0 to 80%RH; ±5% elsewhere

y:

Dew Point Measurement Range: -67° to 122°F (-55° to 50°C)
Wet Bulb Measurement Range: -31° to 122°F (-35° to 50°C)
Enthalpy Measurement Range: -8 to 318 Btu/lb. (-19 to 740kJ/kg)
Response Time:<2 seconds for air speed
Display Size: 1.34 x 0.94 in. (34 x 24mm)
Auto Power Off Trigger: 5 minutes of front-panel inactivity
Backlight Duration: 15 seconds (without front-pan

rrent Consumption: <3 mA with backlight off,

Cu

el activity)

<10 mA with backlight on
Operating Temperature: 32° to 122°F (0° to 50°C) @ <85%RH
Storage Temperature (without battery):

-22° to 140°F (-30° to 60°C) @ <85%RH
Dimensions: 5.83 x 2.08 x 0.87 in. (148 x 53 x 22mm)
Weight (without battery): 2.86 oz. (81g)
Power Source: (1) “CR2032” battery (pre-installed)

13

MAINTENANCE TIPS

When the icon appears in the upper left corner of the LCD,
it’s time to change the anemometer’s “CR2032” battery (although
measurements will remain valid for several hours after the icon
first appears). To change the battery, follow the Setup Instructions
on p. 6. Install the new battery so the side with the text and
+ marking faces up.

Remove the battery if you do not expect to use the
an exten

ded period of time (months or years).

Replace the vane and sensor protection cap (Fig. 1, Callout A)
following each measurement session.

Do not drop or disassemble the unit or immerse it in water.
Do not operate the HHF-309:

• Near a magnet

• Near equipment like arc welders and induction heaters that

generate an electromagnetic field

• In environments full of water vapor, dust or static electricity

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

T
ch

emical cleaners.

HHF-309 for

14

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of 13 months from date of purchase. OMEGA’s Warranty adds
an additional one (1) month grace period to the normal one (1) year product warranty to
cover handling and shipping time. This ensures that OMEGA’s customers receive maximum
coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone
or written request. Upon examination by OMEGA, if the unit is found to be defective, it
will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects
resulting from any action of the purchaser, including but not limited to mishandling,
improper interfacing, operation outside of design limits, improper repair, or unauthorized
modification. This WARRANTY is VOID if the unit shows evidence of having been tampered
with or shows evidence of having been damaged as a result of excessive corrosion; or
current, heat, moisture or vibration; improper specification; misapplication; misuse or
other operating conditions outside of OMEGA’s control. Components in which wear is not
warranted, include but are not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products.
However, OMEGA neither assumes responsibility for any omissions or errors
nor assumes liability for any damages that result from the use of its products
in accordance with information provided by OMEGA, either verbal or written.
OMEGA warrants only that the parts manufactured by the company will be as
specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED,
EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser
set forth herein are exclusive, and the total liability of OMEGA with respect to
this order, whether based on contract, warranty, negligence, indemnification,
strict liability or otherwise, shall not exceed the purchase price of the component
upon which liability is based. In no event shall OMEGA be liable for consequential,
incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used:
(1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation
or activity; or (2) in medical applications or used on humans. Should any Product(s) be
used in or with any nuclear installation or activity, medical application, used on humans, or
misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/
DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold
OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.

WARRANTY/ DISCLAIMER

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT
(IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be
marked on the outside of the return package and on any correspondence. The purchaser is
responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in
transit.

FOR WARRANTY RETURNS, please have
the following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which the
product was PURCHASED,

2. Model and serial number of the product
under warranty, and

3. Repair instructions and/or specific
problems relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement
is possible. This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2015 OMEGA ENGINEERING, INC. All rights reserved. This document may not
be copied, photocopied, reproduced, translated, or reduced to any electronic medium or
machine-readable form, in whole or in part, without the prior written consent of OMEGA
ENGINEERING, INC.

RETURN REQUESTS/ INQUIRIES

FOR NON-WARRANTY REPAIRS,
OMEGA for current repair charges. Have
the following information available BEFORE
contacting OMEGA:

1. Purchase Order number to cover the COST
of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

consult

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

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