Omega HHAQ-108 User Manual

HHAQ-108

Formaldehyde Meter

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User’s Guide

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liability for any errors it contains, and reserves the right to alter specifications without notice.

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FORMALDEHYDE METER

USER’S MANUAL

HHAQ-108

Please read this manual carefully and thoroughly before using this product

TABLE OF CONTENTS

Operating and Maintenance Tips ............................. 15-18

Specifications .......................................................... 14-15

Operating Instructions ............................................. 10-14

Install Batteries ................................................ 9-10

Setup Instructions ..................................................... 9-10

Product Overview ........................................................ 8-9

What’s in thePackage ...................................................... 8

Key Features .................................................................... 7

INTRODUCTION

Thank you for purchasing OMEGA’s HHAQ-108 Formaldehyde
Meter. Please read this user’s manual carefully and thoroughly
before using the product.

The HHAQ-108 is an easy-to-use handheld instrument for
measuring levels of gaseous formaldehyde (HCHO) as part of
a workplace indoor air quality (IAQ) maintenance program or
to spot-check a residential environment.

Exposure to formaldehyde has a significant impact on human
health. In 2011, the U.S. National Toxicology Program
described formaldehyde as “known to be a human
carcinogen.” It can also be toxic and allergenic.

2

Formaldehyde—which is colorless and has a characteristic
pungent, irritating odor—is ubiquitous. It is produced by the
oxidation or combustion of methane and other carbon
compounds and is therefore present in forest fires,
automobile exhaust, and tobacco smoke. When produced in
the atmosphere by the action of sunlight and oxygen on
atmospheric methane and other hydrocarbons, formaldehyde
becomes part of

smog.

T

he primary exposure concern is for the workers in the
industries producing or using formaldehyde. Including indirect
employment, over 4 million people work in the formaldehyde
industry across approximately 11,900 plants in the U.S. and
Canada alone. For example, the textile industry uses
formaldehyde-based resins as finishers to make fabrics
crease-resistant. Formaldehyde-based materials are key t

o

t

he manufacture of automobile transmissions, electrical

systems, engine blocks, door panels, axles and brake shoes.
Occupational exposure to formaldehyde by inhalation is

mainly from three types of sources: thermal or chemical
decomposition of formaldehyde-based resins, formaldehyde
emission from aqueous solutions (for example, embalming
fluids), and combustion of a variety of organic compounds.
Because

formaldehyde resins are used in many

construction
materials it is one of the more common indoor air pollutants.
At concentrations above 0.1 ppm in air, formaldehyde can
irritate the eyes and mucous membranes, resulting in watery
eyes. Formaldehyde inhaled at this concentration may cause
headaches, a burning sensation in the throat and difficulty
breathing, and can trigger or aggravate asthma symptoms.

W

hen treat

ed with phenol, urea, or melamine, formaldehyde
produces polymer resins that are commonly used as
permanent adhesives in plywood and carpeting, in nail

3

hardeners and nail polish, and as the wet-strength material
added to sanitary paper products such as facial tissue, table
napkins and roll towels. Production of formaldehyde resins
accounts for more than half of formaldehyde consumption.

Other formaldehyde derivatives include methylene diphenyl
diisocyanate, an important ingredient of polyurethane paints
and foams. Formaldehyde has been found as a conta

minant

i

n several bath products, at levels from 54 to 610 ppm; it is
thought to arise from the breakdown of preservatives in the
products. Since 2006, formaldehyde (methylene glycol) is also
used in hair smoothing treatments in order to straighten
wavy/curly hair and make hair less prone to frizz in humid
weather. OSHA Oregon has reported these treatments as
unsafe for human health.

An aqueous solution of

formaldehyde can be useful as a

d

isinfectant as it kills most bacteria and fungi, including their
spores. Formaldehyde solutions are applied topically in
medicine to dry the skin, such as in the treatment of warts.

Urinary tract infections are often treated with a derivative of
formaldehyde (methenamine), a method often chosen
because it prevents overuse of antibiotics and the resultant
development of b

acterial resistance to them.

Some topical
creams, cosmetics and personal hygiene products contain
derivatives of formaldehyde as the active ingredients that
prevent the growth of potentially harmful bacteria.

A 1988 Canadian study of houses with urea-formaldehyde
foam insulation found that formaldehyde levels as low as

0.046 ppm were positively correlated with eye and nasal
irritation. A recent review of

studies has shown a strong
association between exposure to formaldehyde and the
development of childhood asthma. Chronic exposure at higher

4

levels, starting at around 1.9 ppm, has been shown to result in
significant damage to pulmonary function, resulting in reduced
maximum mid-expiratory flow and forced vital capacity. There
is also research that supports the theory that formaldehyde
exposure contributes to reproductive problems in women.

RESIDENTIAL EXPOSURE

In the residential environment, formaldehyde exposure comes
from a number of diffe

rent routes; formaldehyde can off-gas

f

rom wood products, such as plywood or particle board, but it
is produced by paints, varnishes, floor finishes, and cigarette
smoke as well.

The U.S. Environmental Protection Agency (EPA) allows no
more than 0.016 ppm formaldehyde in the air in new
buildings constructed for that agency. An EPA study found
that a new home measured 0.076 ppm when brand new and

0.045 ppm

after 30 days. T

he agency recommends the use of
“exterior-grade” pressed-wood products with phenol instead
of urea resin to limit formaldehyde exposure, since pressed­wood products containing formaldehyde resins are often a
significant source of formaldehyde in homes.

People who suffer allergic reactions to formaldehyde tend to
display lesions on the skin in the areas that have had direct
contact with the substance,

such as the neck or thighs (often
due to formaldehyde released from permanent-press
clothing) or dermatitis on the face (typically from cosmetics).
Formaldehyde has been banned in cosmetics in both Sweden
and Japan.

The eyes are most sensitive to formaldehyde exposure: The
lowest level at which many people can begin to smell
formaldehyde is about 0.05 ppm and the highest level is
1 ppm. The maximum concentrat

ion value at the workplace is

5

0.3 ppm. In controlled chamber studies, individuals begin to
sense eye irritation at about 0.5 ppm; 5 to 20% report eye
irritation at 0.5 to 1 ppm; and greater certainty for sensory
irritation occurred at 1 ppm and above. While some agencies
have used a level as low as 0.1 ppm as a threshold for
irritation, the expert panel found that a level of 0.3 ppm would
protect against nearly all irritation. In fa

ct,

the expert panel
found that a level of 1.0 ppm would avoid eye irritation—the
most sensitive endpoint—in 75 to 95% of all people exposed.

Formaldehyde emits from a variety of construction materials,
furnishings, and consumer products. The three products that
emit the highest concentrations are medium-density
fiberboard, hardwood plywood, and particle board.
Environmental factors such as temperature a

nd relat

ive
humidity can elevate levels because formaldehyde has a high
vapor pressure. Formaldehyde levels from building materials
are the highest when a building first opens because materials
have had less time to off-gas. Formaldehyde levels decrease
over time as the sources suppress.

A Guide to Formaldehyde Exposure Levels

0.03 ppm Average outdoor level

0.10 ppm Recommend upper short-term exposure

limit (STEL) limit for residences by ASHRAE,
ANSI, EPA, and NIOSH

0.40 ppm Recommended upper STEL for

manufactured homes

0.50 ppm OSHA’s workplace limit

6

7

0.75 ppm OSHA’s 15-minute time-weighted average
(TWA) limit

0.80 ppm Level at which most people first detect odor

2.00 ppm OSHA’s STEL limit

KEY FEATURES

• Electrochemical sensor measures real-time formaldehyde

gas concentration from 0 to 5 ppm with ±5% accuracy and

0.01 ppm resolution

• Also tracks, calculates and displays three cumulative

formaldehyde gas metrics: 8-hour TWA (time-weighted
average), 1-hour average, and 15-minute STEL (short-term
exposure limit)

• One-button calibration to 0 ppm in fresh air

• User-adjustable high concentration audible alarm threshold

•

Also measures relative humidity (RH) and temperature in

°F or °C

• Manually offsetable long-term drift of temperature and RH

accuracy

• Min/Max memory and data hold

• Large backlit dual-readout LCD

• 15-minute Auto Power Off (can be disabled)

• Low battery indication

• Tripod mount

• Powered by (4) “AAA” batteries

• CE and RoHS approved

• 2 year limited warranty

8

Fig. 1. The controls,

indicators and physical

structures of the

HHAQ-108

1

2

6

5

4

3

WHAT’S IN THE PACKAGE

The HHAQ-108, a 110VAC adaptor and this user’s manual
come in a soft pouch inside a white box.

PRODUCT OVERVIEW

Fig. 1 shows all controls, indicators
and physical structures of the
HHAQ-108. Fig. 2 shows all possible
indications on the LCD. Familiarize
yourself with the locations and
functions of the control buttons
and the meanings of the display
icons before moving on to the
Setup Instructions and Operating
Instructions.

1. Formaldehyde gas sensor inside

vented ball housing

2. Dual-readout LCD

3. Control buttons

HOLD. Freezes b

oth readouts.

A

lso used to increment
individual digits of high
concentration alarm.
MODE. Pressed and held, calibrates meter to 0 ppm in
fresh air. Pressed briefly in high alarm adjustment mode,
shifts one digit to left.

PWR. Pressed briefly with meter off, powers meter on.
Pressed briefly with meter on, arms/disarms high

concentration alarm. Pressed and held with meter on,
powers meter off.

MAX/MIN. Selects value shown on upper readout. Options
are: 1) highest or lowest (Max or Min) level detected since
meter was powered on; 2) 8-hour TWA (time-weighted
average; 3) 15-minute STEL (short-term exposure limit);

4) 1-hour average. Pressed briefly in high alarm
adjustment mode, shifts one digit to right.
SET. Pressed and held, enters/exits high alarm adjustment
mode.
UNIT. Selects °F or °C unit fo

r ambient temperat

ure
reading.
BKLT. Pressed briefly, turns backlight on and off. Also used
to decrement individual digits of high concentration alarm.

4. Battery compartment (on back)

5. Threaded tripod mounting screw hole (on bottom)

6. Jack for AC adaptor (on side)

Fig. 2. All possible display

indications

SETUP INSTRUCTIONS

INSTALL BATTERIES

THE HHAQ-108’s battery compartment (Fig. 1, Callout 4) is
located on the lower back of the meter.

9

Obtain four “AAA” batteries. To install them:

1. Open the battery compartment by using your thumb to

slide its cover down and away from the meter.

2. Install the batteries in series in the compartment,

observing the polarity markings inside.

3. Close the battery compartment by sliding the cover back

up on its track until it snaps shut.

OPERATING INSTRUCTIONS

To power on the HHAQ-108, briefly press the PWR button.
The CD will illuminate and immediately begin scrolling “Os”
across the five positions on the upper readout to indicate that
it is warming up. During the warmup period, the meter will
burn off any dust on the formaldehyde sensor inside the
vented ball. If this is the first use of the meter or if it has not
been powered on for a long time, the warmup period may last
as long as several hours.

Normally, it takes 1 to 15 minutes for the scrolling to stop.
O

nce it stops, the upper readout will begin counting down
from 9999 through 8888 and 7777 all the way to 0000. When
the upper readout reaches 0000, if no formaldehyde is
present the upper readout will begin reading 0.00 ppm, the
lower readout will begin alternating displays of ambient
temperature and RH, and the term HCHO (the chemical
formula for formaldehyde) will appear below the lower
read

out.

10

If you want the meter to calculate and display cumulative
formaldehyde levels over a period longer than 15 minutes
(the meter’s Auto Power Off triggering time), you must disable
the APO function. To power on the HHAQ-108 and
simultaneously disable the APO function, first press and
hold the HOLD button, and then (without releasing HOLD)
press and hold the PWR button. Doing this will cause a small
n to briefly appear on the LCD before the meter powers

up

w

ith both readouts visible. There is no permanent on-screen
indication that the APO function has been disabled. So if you
disable APO, realize that the batteries will discharge within an
hour or two if you forget to manually power off the meter
after a measurement session.

Once the meter has been powered on and both readouts have
stabilized, the HHAQ-108 automatically begins operating in real­time measurement mode. In this mode you can:

1) Turn the LCD backlight

on and off,

by briefly pressing the
BKLT button. This feature comes in handy when making
measurements above your head, below your knees, around
a corner, or in the dark.

2) Calibrate the meter to 0 ppm. With the HHAQ-108 powered
on in a room completely free of formaldehyde gas, enter
calibration mode by pressing and holding the MODE
button. This will produce the screen shown below, with
temperature and RH values
continuing to alternate on the lower
readout. The “ooooo” string will
continue to flash during the self­ca

librat

ion procedure, which

typically takes 15 seconds.

11

3) Freeze both readouts by briefly
pressing the HOLD button. The term
Hold will appear below the lower
readout as a reminder that neither
readout is now showing real-time
values.

4) Change the unit of the ambient temperature value shown
on the lower readout to/from °F and °C by pressing the
UNIT button. The HHAQ-108 will “remember” the unit in use

when the meter powers off and will resume using that unit
when it is powered on again.

5) Adjust the high concentration alarm threshold. To enter
threshold adjustment mode, press and hold the SET
button. T

his will produce a display show

ing 0.08 ppm (the
default alarm threshold) on the upper readout, with the left
“0” (the “ones” digit) flashing. To raise the threshold in
increments of 1 ppm to a maximum of 5 ppm, press the
HOLD button one or more times. To lower the threshold in
increments of 1 ppm, press the BKLT button one or more
times.
To adjust the alarm threshold in increments of less than
1 ppm, use

the MODE a

nd MAX/MIN buttons to move the
flashing digit left and right, respectively. Then use the
HOLD and BKLT buttons to set the “tenths” and

12

“hundredths” digits of the ppm threshold to any value
between 0 and 9. Used together, the HOLD, BKLT, MODE
and MAX/MIN buttons allow you to set the alarm threshold
to any value between 0 and 5 ppm with 0.01 ppm
resolution.
Once you have adjusted the high alarm threshold to its
desired value, press and hold the SET button to save the
setting and return to real-time measurement mode.

6) Arm and disarm the high concentration alarm.
a

. To arm the alarm, briefly press (but do not hold) the

PWR button until the icon appears in the upper left

corner of the LCD.

b. To disarm the alarm, briefly press the PWR button until

the icon disappears.

c. To cancel the alarm when it sounds, briefly press the

PWR button.

7) Display maximum and minimum formaldehyde,
temperature and RH session values, as well as
cumulative formaldehyde exp

osure levels. A

m

easurement session is the period of time during which
you measure the formaldehyde level, temperature and RH
at multiple locations. The session begins when you power
on the HHAQ-108; it typically ends 15 minutes after you
finish making measurements with the activation of the APO
function. You can extend a measurement session beyond

13

15 minutes by pressing any front-panel button (in effect,
resetting the clock to zero) or by disabling the APO function
and powering the HHAQ-108 through the optional AC adaptor
(see page 11 to learn how to do this).

The value of being able to quickly determine where the
level of formaldehyde is highest and lowest in an area or
facility should be obvious.

The sequence of five screen shots below illustrates the
order in which the two session values and three
cum

ulat

ive formaldehyde exposure metrics are displayed

by pressing the MAX/MIN button.

To clear the MAX and MIN session values without powering
off the meter, press and hold the HOLD button for at least
2 seconds. This will flash the text CLr on the lower readout,
switch the meter to real-time measurement mode, and reset
the Max and Min memories to the values being measured at
that moment.

SPECIFICATIONS

Formaldehyde Range / Resolution: 0 to 5 ppm / 0.01 ppm
Formaldehyde Accuracy: ±(5% + 0.03 ppm)*
Formaldehyde Sensor Type/Warmup Time: Electrochemical /

1 to 15 minutes, typical
Temperature Range: 0° to 122°F (0° to 50°C)
Temperature Accuracy/Resolution: ±1.8°F (1°C) / 0.1°
RH Range: 10 to 90%RH

14

RH Accuracy / Resolution: ±5% of reading / 0.1%RH
Display Type / Size: Dual readout LCD / 2 in. (51mm) diagonal
Auto Power Off Trigger: 15 minutes of front-panel inactivity

(can be disabled)

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

0 to 95%RH, non-condensing
Dimensions: 8.3 x 2.4 x 1.0 in. (210 x 60 x 25mm)
Weight: 7.2 oz. (204g), including batteries
Power Source: (4) “AAA” batteries (not incl

uded) or incl

uded

110VAC adaptor
* Meets U.S. National Institute for Occupational Safety and

Health's (NIOSH's) acceptance criterion within ±25% of true
value at 95% confidence level

OPERATING & MAINTENANCE TIPS

When the low battery indicator appears in the upper right
corner of the LCD, install fresh batteries immediately,
following the instructions on pages 9 and 10 of this manual.
Be aware that measurements remain valid even though the
batteries have grown weak.

The electrochemical formaldehyde sensor is as power-hungry
as it is accurate and sensitive. OMEGA recommends using
the included 110VAC adaptor if you plan to routinely conduct
m

easurement sessions lasting more than 15 minutes. The
AC adaptor can also provide a worry-free way to keep the
HHAQ-108 powered long enough to calculate and display the
three cumulative formaldehyde exposure metrics.

Remove the batteries if you don’t expect to use the HHAQ-108
for an extended period of time (months or years).

The meter uses a capacitive RH sensor and a thermistor
temperature sensor whose accuracy may drift over time. If you

15

notice that the temperature and/or RH readings on the lower
readout are consistently high or low, compared to a known
reference, write down the magnitude(s) of the difference,
including whether it is positive or negative. This number (for
temperature or RH) or these numbers (for both parameters),
represent the extent of the HHAQ-108’s temperature and/or

Following is a procedure that you can perform to offset either
or both types of drift and thereby restore the HHAQ-108’s
specified accuracy.

1) With the meter powered off, press and hold the MODE and
BKLT buttons with fingers of your left hand while pressing
and holding the MAX/MIN and PWR buttons with fingers of
your right hand.

2) When the LCD shows 0.0C and SET, release all four buttons.

3) If you prefer to work in °F, press the UNIT button briefly to
change 0.0C to 0.0F.

4) If your temperature drift is negative, you want to add value
to 0.0 to compensat

e. If your temperature drift is positive,
you want to subtract value. To add value to the 0.0 term,
press the HOLD button once for each 0.1° of compensation
you need. To subtract value, press the BKLT button once
for each 0.1°C of compensation. You can press and hold
the HOLD or BKLT button to add or decrease a large value.
The maximum amount of temperature drift you can
compensate for is ±9.9° (C or F

).

5

) If you only need to compensate for temperature drift, press

and hold the SET button to save the offset value you
entered. After the bottom line of the LCD shows SAVE for
2 seconds, the meter will automatically power off with your
temperature offset in place.

16

RH drift.

6) If you also need to offset RH, do not press and hold the SET
button yet. Instead, press the SET button briefly. This will
change the display to 0.0%.

7) If your RH drift is negative, you want to add value to 0.0 to
compensate. If your RH drift is positive, you want to
subtract value. To add value to the 0.0 term, press the
HOLD button once for each 0.1% of compensation you
need. To subtract value, press t

he BKLT b

utton once for
each 0.1% of compensation. The maximum amount of RH
drift you can compensate for is ±9.9%RH.

8) When you are satisfied with the temperature and/or RH
offset values you have entered, press and hold the SET
button to save the settings. After the bottom line of the LCD
shows SAVE for 2 seconds, the meter will automatically
power off with the offsets in place.

Abrupt temperature changes

will cause condensat

ion and
possible vapor penetration. Clean the LCD after the vapor
evaporates. Blow off loose particles with compressed air.
Gently brush remaining debris away with a lens hair brush.

Never use a solvent or an abrasive cleaner on the FD08. To
clean the housing, use a soft, damp cloth.

Do not drop or disassemble the meter or immerse it in water.
There are two error messages you may enco

unter when

u

sing the HHAQ-108:

17

Er1: Typically indicates damage to the formaldehyde sensor,

ambient temperature sensor or RH sensor.

Er2: Typically displayed for 1 second on the lower readout

when the meter tries to measure a temperature or RH
value outside the specified measurement range. It may
also be produced by clearing the Max/Min memory.

18

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.

FOR NON-WARRANTY REPAIRS,

consult
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.

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.

WARRANTY/ DISCLAIMER

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.

RETURN REQUESTS/ INQUIRIES

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.

M5499/0915

Where Do I Find Everything I Need for

Process Measurement and Control?

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Shop online at omega.com

SM

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