Omega HHTP21 User guide

HHTP21

User’s Guide

ALM

Health

Index

MODE MEM

MAX

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omega.com

e-mail: [email protected]

For latest product manuals:

omegamanual.info

READ

HHTP21

Air Quality Monitor

SM

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.

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

1. SAFETY INFORMATION

❑ Read and keep the instruction manual.

❑ Follow all warnings and instructions.

❑ Avoid any adhesive particle like oil, etc. from gettng onto the meter.

❑ Do not install or operate the meter close to noise generator, such as

electric dust collector, fluorescent lighting, etc.

❑ Avoid use on mechanical vibration.

❑ Avoid use in moisture.

❑ Do not use the meter near water, such as a sink, wash basin, or bathtub.

❑ Do not spill any liquids onto or into the meter.

❑ Do not push any objects into the openings of the meter.

❑ Do not use any liquid or spray cleaners on the meter.

Clean only with dry cloth.

❑ Do not install or operate near any source of heat.

❑ Do not use the meter in direct sunlight or other bright light source.

❑ Air sampling port shall not be covered when in use.

❑ Place the meter in a flat and safe surface to prevent it from dropping.

While the meter can detect levels of airborne particulates it cannot
determine the health impact for any given individual.
Respiratory ailments and allergic symptoms are caused by a variety
of factor. The meter is not meant to be used in the treatment or
mitigation of any medical condition.

Health Disclaimer

2. INTRODUCTION

Particle pollution comes from many different type of sources. Fine particle
(2.5 micrometers in diameter and smaller) include power plants, industrial
processes, vehicle tailpipes, wood stoves, and wildfires. Coarse particles
(between 2.5 and 10 micrometers) come from crushing and grinding
operations, road dust, and some agricultural operations.

Particle pollution is linked a number of health problems, including coughing,
wheezing, reduced lung function, asthma attacks, heart attacks and strokes.
It also is linked to early death.

-1-

Some people may be at greater risk from particle pollution. They include:

People with cardiovascular disease (diseases of the heart and blood

❑

vessels).

People with lung disease, including asthma and COPD.

❑

Children and teenagers.

❑

Older adults.

❑

Research indicates that obesity or diabetes may increase risk.

❑

New or expectant mothers may want to take precaution to protect the

❑

health of their babies.
The meter is a real-time air quality monitor instrument used to monitor the
concentration of PM2.5, humidity and temperature in the indoor environment.
The meter convert the concentration of PM2.5 in the air into visual data, and
evaluate the air quality comprehensively. Visual and audio alarm will be actived
when the air quality reached a critical or alarm limit values.

2-1 Features:

Fine particulate matter (PM2.5) measurement.

❑

Temperature and Humidity measurements.

❑

Health index (0 ~ 9) detection and alarm.

❑

PM2.5 time weighted average reading.

❑

Data hold and MAX/MIN with time stamp function.

❑

Six-color LED indication Air Quality Index Category.

❑

Preset warning point of buzzer alarm, LED and alarm output.

❑

Manual data memory and read function.

❑

2-2 Applications:

Sensitive individuals can monitor their personal space at home and work.

❑

Evaluate effectiveness and placement of air filtration devices.

❑
❑

Investigate the effectiveness of different strategies to reduce particulates.

❑

Correlate health related issues to changes in particulate levels.

❑

Indoor air quality investigations.

❑

Evaluate effectiveness of air filtration.

❑

Continuous monitoring of building conditions (continuous commissioning)

❑

Troubleshooting/optimization of filtration methods.

❑

Sales tool for understanding filtration needs.

-2-

3. SPECIFICATIONS

Measurement Range

❑

PM2.5

: 0 to 500 g

Humidity
Temperature: -20°C to +60°C (-4°F to +140°F)

Resolution: 1g/m

❑

Accuracy:

❑

PM2.5

: ±10% of reading±10 g

:

3

µ

/m

: 1% to 99%R.H.

3

, 0.1% R.H., 0.1°C, 0.1°F

µ

µ

Temperature: ±0.8°C, ±1.5°F
Humidity: ±3%RH (at 25°C, 30 to 80% RH).

±5%RH (at 25°C, 0 to 20% RH and 80 to 100% RH).

❑

Sensor type:

PM2.5: Optical sensing with an IRLED and a photodiode sensor.
Humidity: Precision capacitance sensor
Temperature: Thermistor sensor

Response time:

❑

PM2.5

:≤1min

Humidity

: 45%R.H. to 95% R.H. 1

95%R.H. to 45%R.H.3min

≤

min

≤

Temperature : 10°C/2 sec.

Flow rate: 0.115m

❑

Sampling rate: 1 sample/second.

❑

Data Memory Capacity: 39 sets. (Direct reading from LCD display)

❑

Alarm Output: Open-collect output. Input impedance: 490Ω

❑

3

/min (4.135 CFM)

Maximum applied Voltage: 24V DC
Maximum drive current: 50mA DC

Operating temperature and humidity: 0°C to 60°C, below 95% R.H.

❑

❑

Storage temperature and humidity: -10°C to 60°C, below 70% R.H.

Power supply: Four 1.5V LR-6/AA size batteries, AC adapter

❑

y life: Approx. 8 hour

Batter

❑

Dimensions: 165mm(L)×93mm(W)×75mm(T), (6.5"L×3.7"W×3"T)

❑

❑

Weight: Approx. 380g (13.4oz)
Accessories: Instruction manual, Battery, AC adaptor DC6V 1000mA.

❑

-3-

4. PARTS & CONTROLS

4-1 Description of Parts & Control keys:

ALM

Health

Index

MODE MEM

READMAX

-4-

1. PM2.5 LED Air quality indicator

LED

Red

Air Quality

Index

Good

(0 – 50)

Moderate

(51 – 100)

Unhealthy

for Sensitive

Groups

(101 – 150)

Unhealthy
(151~200)

Who Needs to Be Concerned ?

24-hour average

No one. Air quality is good for
everyone.
Some people may be unusually
sensitive to particle pollution and
may need to take precautions.

Sensitive groups include people
with heart or lung disease, older
adults, children and teenagers.

Everyone can be affected. 55.5 – 150.4

Color

Green

Yellow

Orange

Very

Purple

Unhealthy

Everyone 150.5 – 250.4

(201 – 300)

Maroon

Hazardous

(301 – 500)

Everyone 250.5 – 500

2. LCD display.

3. Power and Backlight control key:

 Press this key to turn on the meter.
 Press this key again to turn on or off the LCD backlight.
 Press this key for 3 seconds to turn off the meter.

4. MODE S key:
MODE



key: Press this key to cycle the Measurement, PM2.5 TWA

(Time-Weighted Average) and Current Date reading.

 S key: Press this key for 3 seconds to enter the Setting Mode.

Press key to exit this mode.

SET dAtE
SET bEEP
SET UNit
SET PM2.5 TWA
SET cA
SET ALM

5. MAX key:

: Real-time setting mode.

: Alarm sound on/off setting mode.

: Temperature unit °C/°F setting mode.

: PM2.5 TWA average time setting mode.

: User calibration setting mode.

: Alarm limit values setting mode.

 key: In the setting mode, press this key to store the setting data and exit.

MAX



key: Press this key to enter the MAX (maximum) /

Recording Mode.

µ

PM2.5 (

g/m

0.0 – 12.0

12.1 – 35.4

35.5 – 55.4

MIN (minimum)

3

)

-5-

Press this key to circulate the MAX and MIN reading.

Press this key for 3 seconds to exit this mode and store one set recorded
datas to memory.

u

key:

6. MEM

 u key: In the setting mode, press this key to move cursor to the desired

position.

MEM key



a).
b).

7. READ

 p

READ key



:

Memory function
Clear the stored data

again. There shows “

YES

“

” or “no” to erase the memory data.

key:

p

key

: In the setting mode, press this key to increase the parameter.

: Press this key one time to store a measuring data.

: Press and hold this key, then turn on the meter

rEC CLr no

” mark on LCD. Press p key to select

: Press this key to enter the READ mode, then press this key

again to select the desired stored number of data to read.
Press !key to exit.

8. Air sampling inlet port.

9. Air sampling outlet port.

10. Alarm output jack:

Alarm signal is available this jack.

11. AC adaptor power jack (DC 6V, 1000mA).

12. Battery compartment.

4-2 Description of Display:

-6-

SET

: Setting mode indication.

HOLD

: In the user calibration setting mode, the measuring data hold

indication for calibration.

MAX

: In the MAX/MIN recording mode, maximum value indication.

MIN

: In the MAX/MIN recording mode, minimum value indication.

MAX MIN

: In the MAX/MIN recording mode, current value indication.
: Battery capacity indication.
: Low battery indication.

PM2.5

: Fine particulate matter (PM2.5) measurement value indication.

PM2.5 TWA

g/m

: Fine particulate matter (PM2.5) measurement TWA value

indication.

3

: PM2.5 measurement unit.

: PM2.5 measurement value.

: Disable alarm sound indication.

: Enable alarm sound indication.

ALM

: Enable the alarm function indication.

: Measurement value upper to the high limit value or setting the high limit

value indication.

: Measurement value below to the low limit value or setting the low limit

value indication.

: Current time (hour:minute) indication.

: PM2.5 air particle pollution is based on a scale from 0 – 9 indication.

0: Very good, 1: Good, 2 – 4: Moderate, 5 – 8: Poor, 9: Very poor.

: Temperature measurement value.

M

: Store one set of data into memory.

M 39

: Manual memory address number indication.

R

: Read mode indication.

R 39

: Recall manual memory address number indication.

Hour 24

: PM2.5 TWA average time indication or setting.

: Relative humidity measurement value.

Year Month Date hour min sec

: Real-time or MAX/MIN recorded stamp time

indication.

-7-

5. BEFORE OPERATION

or

the

en

not

5-1 Power Supply:

The meter can be powered by two ways: Four AA-size alkaline batteries
the AC adaptor.

5-2 Install the Batteries:

Insert four AA-size batteries as indicated by the diagram located on
inside of the battery compartment.
The meter is disigned to operate only with alkaline batteries.
When the battery voltage drop below the operating voltage, the “
mark will be blink displayed, it indicates the batteries need to be changed.

5-3 AC Adaptor:

The AC adaptor allows you to power the meter from a wall outlet. Wh
using the AC adaptor, the batteries (if installed) will be by passed. The AC
adaptor is not a battery charger.

5-4 Air Sampling Port:

Always ensures that the meter air sampling inlet and outlet port are

blocked and open to the atmosphere.

6. OPERATING INSTRACTIONS

6-1 Selecting Temperature Unit °C or °F :

1. Press

2. Press S key for 3 seconds to enter the setting mode, the “

key to turn on the meter.

SET

” and “

dAtE

marks are displayed.

3. Press S key 2 times to enter the temperature unit °C /°F setting mode, the

Unit

“

” mark is displayed.

4. Press u key to select “°C” or “°F” unit now blink on the display.

5. Press key to store the desired measure unit.

6-2 Taking Measurements:

1. Press key to turn on the meter.

2. The display will shows the PM2.5 concentration reading (PM2.5 g/m3),

µ

Temperature reading (°C or °F ), Humidity reading (%RH), Real-time
hour:minute (

), and PM2.5 air particle pollution (Health Index 0 –

9 ). The Health Index 5 – 9 will be blink display for warning.

3. The PM2.5 LED air quality indicator in a color format, the Red, Purple and
Maroon colors will be blink.

”

”

-8-

4. Press

MODE

key to cycle the Measurement, PM2.5 TWA and Real-time

display. If the measurement time arrive ahead of the TWA average setting

5. Press

6. Press key for 3 seconds to turn off the meter.

6-3 Setting the TWA Average Time:

1. Press

2. Press S key for 3 seconds to enter the setting mode, the “

3. Press S key 3 times to enter the PM2.5 TWA average time setting mode,

4. Press p key to select the desired average time from 1 to 24 hours.

5. Press key to store the setting value and exit this mode.

6-4 Setting the Real-Time:

1. Press

2. Press S key for 3 seconds to enter the real-time setting mode, the “

3. Using u key to position the cursor on the date or time element to adjust.

4. Press

5. Press key to complete the action.

6-5 Taking Maximum (MAX) and Minimum (MIN) Recorder Measurements:

1. Press key to turn on the meter.

2. Press

3. If you wish to read previously recorded data, press

4. Press

time, the “

displayed.

the “

The meter internal clock is used in the display and for time-stampling
recorded measurements.

dAtE

OLd dAtA

display the recorded data, then press
mode. Otherwise press
auto clear the previous recorded data.

 Current measurement reading, the “




hour - -:

” will be displayed.

key again to turn on or off the LCD backlight.

key to turn on the meter.

SET PM2.5 TWA hour

key to turn on the meter.

” mark is displayed.

key to change the selected date or time element value.

MAX

key to enter the read previous recorded data mode, the “

” mark is displayed.

MAX

key to cycle through the

MAX.

reading for PM2.5, temperature and humidity, the “

displayed.

MAX.

reading for PM2.5 TWA, temperature and humidity, the “

TWA

” mark is displayed.

” mark is displayed.

MAX

MAX

key again to enter the recorder mode and

key for 3 seconds to exit this

MAX MIN

-9-

” mark is displayed.

READ

SET

” mark is

key to cycle

MAX

” mark is

MAX

SET

rEAd

MIN.



reading for PM2.5, temperature and humidity, the “

displayed.

MIN.



reading for PM2.5 TWA, temperature and humidity, the “

TWA

” mark is displayed.

MAX.



PM2.5 reading with its temperature and humidity reading, the

PM2.5

“

” mark is blinks.

MIN.



PM2.5 reading with its temperature and humidity reading, the

PM2.5

“

” mark is blinks.

MAX



. temperature reading with its PM2.5 and humidity reading, the “°C

°F

or

” mark is blink.

MIN.



temperature reading with its PM2.5 and humidity reading, the

“°C or °F ” mark is blink.

MAX.



humidity reading with its PM2.5 and temperature reading, the

%RH

“

” mark is blink.

11

MIN.

humidity reading with its PM2.5 and temperature reading, the

%RH

“

” mark is blink.

Under  to

11

steps, users also can get the occurred time by press
key to display the occurred time, press
display.

11

Under  to

5. Press

steps, the “R” mark is displayed.

MAX

key for 3 seconds to exit this mode and store the recorded

data to memory.

MODE

key again to exit time

MIN

MIN

” mark is

MODE

6-6 Taking Alarm Operation:

1. Quantity for alarm operation

Alarm setpoints

:

A alarm monitors the quantity chosen for the alarm operation. When the
measured value is in between the “

high

is OFF. When choosing low value as “

low

“

” value, the alarm is OFF when the measured value is not between

low

” and “

high

” limit values, the alarm

” value and higher value as

the setpoints. You can also set only one setpoint.

The figure for illustrative examples of the different measurement-based
alarm operation modes.

Hysteresis function is to prevent the alarm operation back and forth when
the measured value is near to the setpoint values. Hysteresis value should
be smaller than the difference of the setpoints.

-10-

Mode 1: Only “high” setpoint set.

MODE 2: Only “low” setpoint set.

Alarm is ON when value is
above the setpoint.

Mode 3: Both setpoints set

“high” > “low”.

Alarm is ON when value is
outside the setpoints.

Legend

A: “high” setpoint value Alarm is ON
B: “low” setpoint value

h: Hysteresis value

Alarm is ON when value is
below the setpoint.

Mode 4: Both setpoints set

“high” < “low”.

Alarm is OFF when value is
outside the setpoints.

 Alarm is ON

¢

Alarm is OFF

-11-

2. Setting the alarm limit values

 Press
 Press S key for 3 seconds to enter the setting mode, the “

displayed.

 Press S key 5 times to enter the PM2.5 alarm mode select, the “

ALM

 Press p key to select the desired PM2.5 alarm mode from 1 to 4, then

press key to select and to enter the alarm limit values setting mode.

 The “

the “p
the “p
Press p key to set the desired value, the p key can be held down to

increase the speed.
Press key to move the next setting value or to enter the temperature

alarm mode select, the “°C or °F

 Repeat step  and  above to complete the temperature limit value

setting, and to enter the humidity alarm mode select, the “
and “

 Repeat step  and  above to complete the humidity limit value setting,

and exit the alarm limit values setting mode.

3. Setting the alarm sound ON/OFF

 Press key to turn on the meter.
 Press S key for 3 seconds to enter the setting mode, the “

displayed.

 Press S key 1 times to enter this mode, the “

are displayed.

 Press p key to select “

for enable the alarm sound.

 Press key to exit this mode.

4. To turn-on and turn-off alarm function.

 Press

ALM

“

 Press

or “

key to turn on the meter.

no-x

” and “

ALM

ALM
ALM

no-x

READ

ALM

” marks are displayed.

q” mark indication setting the low limit value,

” mark indication setting the high limit value, and
q” mark indication setting the hysteresis value.

ALM

” and “

”marks are displayed.

” for disable the alarm sound or select “

READ

key for 3 seconds to turn on the alarm function, the

ALM

” or “

key one time to turn off the alarm function, the “

” mark is disappeared.

” mark is displayed.

no-x

” marks are displayed.

bEEP

” and “

SET

” mark is

PM2.5

%RH, ALM

SET

” mark is

” marks

ALM

”

”

”

-12-

6-7 Manual data Memory and Read Mode:

1. To clear the manual memorized data

 Press

 Press and hold down

LCD show “

 Press p key to select “

If you select “YES” the memorized data will be cleared.

2. To memorized the reading

 Press

the memory. At this moment, LCD will show the memory address
number and the “M” mark will be disappear one time. Total memory size
is 39 sets.

 When the memory is full, LCD will show “

3. To recall the memorized data.

❑ Press

and the memory address number.

❑ Press

display.

❑ Press

again to exit the date and time display.

❑ Press key to exit.

6-8 User Friendly Calibration Procedure:

6-8-1

Use standard PM2.5 meter for 2-point calibration, use standard

1. Press key to turn on the meter.

2. Press S key for 3 seconds to enter the setting mode, the “
displayed.

3. Press S key 4 times to enter the calibration mode, “

4. Wait about 10 minutes, until the meter and the standard meters all readings
are stable, then press key to hold the meter measured values, the

HOLD

“

5. Press and hold down the key to increase the PM2.5 first point value or
press and hold down the key to decrease the value, until the PM2.5
value is same as the PM2.5 standard meter.

key to turn off the meter.

rEC CLr no

MEM

key each time will store one set of the measured value into

READ

READ

MODE

temperature meter for 1-point calibration, and use standard humidity
meter for 1-point calibration.

” mark is displayed and the “

MEM

” mark.

YES

key to enter the READ mode, the LCD will show “R” mark

key to select the desired memory address number data for

key to display the stored date and time, press

p

key then press key to turn on the meter,

” or “no”, then press key to exit.

rEC FULL

PM2.5 1

” mark is blinking.

u

” mark.

SET

CA 1

” mark is displayed.

MODE

” mark is

key

-13-

6. Press key, the “°C or °F ” mark is displayed, press or key until

the temperature value is same as the standard temperature meter.

7. Press key, the “

humidity value is same as the standard humidity meter.

8. Press key to enter the PM2.5 second point calibration mode, the “

2

” mark is displayed.

9. Wait about 10 minutes, until the meter and PM2.5 standard meter

reading are stable, then press key to hold the meter measured value,

HOLD

the “

10. Press or key until the PM2.5 second point value is same as the

11. Press key to complete the calibration procedure and exit this mode.

6-8-2 Reset to factory calibration

pu

PM2.5 standard meter.

1. Press

2. Press and hold down S key then press key to turn on the meter,

CA Fact no

the “

3. Press  key to select “
factory calibration.

%RH

” mark is displayed, press or key until the

” mark is displayed and the “

key to turn off the meter.

” mark is displayed.

YES

” or “no”. If you select “

PM2.5 2

pu

pu

” mark is blink.

YES

” will reset to

7. MAINTENANCE

7-1 Cleaning

Periodically wipe the case with a dry or damp cloth and mild detergent.
Do not use abrasives or solvents to clean this instrument.

7-2 Battery Replacement

When the battery power is not sufficient, LCD will show “ ” mark is
blink, the four 1.5V “AA” alkaline batteries must be replaced.

1. Turn the meter off.

2. Remove the meter’s battery cover.

3. Replace the batteries observing polarity.

4. Affix the battery cover.

CA

-14-

8. AIR POLLUTION REGULATION

PM2.5

µ

g/m

Yearly

average

3

average

IT-1 IT-2 IT-3 AQG

35 25 15 10 25 12 12 -

Daily

75 50 37.5 25 - 35 - 30

(24-hour)

Australi

Japan

a

8 15 - 35 15 35 25 15

25 35 - 75 35 75 50 35

PM2.5

µ

g/m

average

3

average

Yearly

Daily

(24-hour)

South
Korea

European

Union

Hong
Kong

United

California

States

China

Class1 Class2

ASU OHW

Canada

Thailand Taiwan

-15-

NOTES:

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

SM

TEMPERATURE

MU

Thermocouple, RTD & Thermistor

Probes, Connectors, Panels &
Assemblies

MU

Wire: Thermocouple, RTD &

Thermistor

MU

Calibrators & Ice Point References

MU

Recorders, Controllers & Process

Monitors

MU

Infrared Pyrometers

PRESSURE, STRAIN AND
FORCE

MU

Transducers & Strain Gages

MU

Load Cells & Pressure Gages

MU

Displacement Transducers

MU

Instrumentation & Accessories

FLOW/LEVEL

MU

Rotameters, Gas Mass Flowmeters

& Flow Computers

MU

Air Velocity Indicators

MU

Turbine/Paddlewheel Systems

MU

Totalizers & Batch Controllers

pH/CONDUCTIVITY

MU

pH Electrodes, Testers &

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MU

Benchtop/Laboratory Meters

MU

Controllers, Calibrators, Simulators

& Pumps

MU

Industrial pH & Conductivity

Equipment

DATA ACQUISITION

MU

Data Acquisition & Engineering

Software

MU

Communications-Based Acquisition

Systems

MU

Plug-in Cards for Apple, IBM &

Compatibles

MU

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MU

Recorders, Printers & Plotters

HEATERS

MU

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MU

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MU

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MU

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MU

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MU

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MU

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MU

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MU

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MU

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MU

pH, Conductivity & Dissolved

Oxygen Instruments

M5486/1015