Co2meter 77597 Operation Manual

OPERATION MANUAL

PORTABLE IAQ METER

CO2Meter.com

131 Business Center Drive
Ormond Beach, FL 32174 USA
Support: [phone]
Email: [email protected]

Thank you for

purchasing t

his portable

Indoor Air Quality (

I

AQ) me ter. The meter

me

asures

the carbon dioxide (

CO

2) level

,

carbon monoxide (

CO) level,

air

t

emperature, dew point,

wet bulb

t

emperature and humidity, and is an ideal

portable

instrument for IAQ diagnosis.

Poor indoor air quality is considered
unheal

thy

because it

causes t

iredness

,

los

s of

ability to

concentrate,

and even

illness

(for example: Sick Building

Syndro

me). IAQ

moni

t

oring

has

become

widel

y applied in public areas such as

o

ff

ices, classrooms, fact

ories,

hospitals

an

d hotels. It is

also suggested in

regula

t

ions of

industrial hygiene in some

coun

t

ries (see Appendix).

The portable CO2 meter uses NDIR (non­dispersive

infrared) t

echnology to

ensure

reliabili

ty

and long t

erm stability. It is

use

ful in

verifying HVAC system

performance

and air ventilation control.

The IAQ meter also measures carbo n

monoxide. CO is a colorless,

odorless,

and tast

eless gas which is lighter t

han air

.

It is highly t

oxic to

humans and anima ls.

The maximum

CO

indoor air quality level
per ASHRAE Residential standards 62­1989

for

living area is under 9ppm.

Besides, it is also necessary to

remove
employees from enclosed space if the
CO concentration exceeds 100ppm per
the

OSHA exposure limit. Please refer t

o

the Appendix for the details.

1

INTRODUCTION

This package contains:

 Meter
 4 AA batteries

 Mini USB cable and software C

D

 Operation manual
 Hard carrying case
 Adaptor (9V/100~240Vac)
 33% calibrati on salt
 75% cali bration salt

2

MATERIAL SUPPLIED

Features:

• Big LCD display with blue

backlight to use in dark area

• One touch to display CO

2 /Dew

Point temperature/Wet bulb
temperature/

• Air temperature/Humidity/CO in

turns. Designed with NDIR (non­dispersive infrared) Waveguide
technology CO

2 sensor

• Programmable warning CO level

• Long term NDIR CO2 sensor drift

compensation

• Audible alarm (~80db) threshold

setting Max, Min, TWA, STEL
functions included Mini USB to PC
download function for analysis

• 99 memory points manually

recorded

• 24,000 data points auto recording

• Review 99 points manual record

• Hold function freezes current

readings Wide, slotted housing
design improves air ventilation for
quicker and more accurate
response

• Easy to manually calibrate

CO2 in fresh air (~400ppm).

The meter is powered by either 4 AA
batteries or a DC adaptor (9V/1A output).

Install the batteries into the battery

compartment on the rear and make sur

e

they are in correct polarity and good
contact. When an adaptor is used, it wil

l

cut off the power supply from batteries.
The adaptor can’t be used as a battery

charger.

When battery voltage gets low

B

will

appear on the LCD (Fig.1).
The CO2 sensor cannot work normally
under low voltage. Please replace wit

h

fresh batteries or connect the adaptor.

Fig.1

3

CO

2

PM

B

POWER SUPPLY

MIN

AVG

TWA

O O

F

AM

Symbols

UpperLCD CO2/CO/Temp/RH

display

LowerLCD Clock/timer display

CO

2

CO

HOLD
MIN/MA

X

STEL

Carbon dioxide reading

Carbon monoxide reading
Readings are frozen unchanged
Minimum/Maximum readings
Short-term exposure limit (15

minutes weighted average)

Time weighted average (8 hours)
Low battery indicator
Dew point temperature
Dry air temperature

Wet bulb temperature

Unit of relative humidity

Celsius/Fahrenheit temperature

In calibration mode

In manual/automatic logging

In manual records recall mode

TWA

B

DP
TA
WBT
%RH

o C/o

F
CAL
REC

RECALL

Turns on and off the meter.

Enters setup mode while meter is off

.

Sets as non-sleep mode with

HOLD

.

Exits setup/recall page.

Start automatic logging.

ON/OFF

SET

START

ESC

Press to switch displayed mode.

Long press to enter memory recall mode.

4

MODE

RECALL

KEYPAD

HOLD

CO

2

CO

TADPWBT

MAX

C

STEL

%rh

CAL

REC

B

Re call

LCD DISPLAY

HOLD

Freezes the current readings.

Selects unit or increases value in setup.
Cancels data hold function.

MEM

Press to manually record the reading.

Selects unit or decreases value in setup.

POWER ON/OFF

Press to turn the meter on and off.

M

N/AVG

Activates MIN, MAX, TWA, TEL

X

function. Saves and finishes settings.

ON/OFF

SET

At power up, it emits a short beep and

performs a 30 second countdown
(Fig.2). It then displays the normal mode
and clock

(Fig.3). The real time display

will cycle between date and time in turns.

Fig.2

Fig.3

While waiting for 30 seconds to warm up
is best, for a quick start you can press

M X/AVG

N

for 2 seconds to end the warm up

and show the normal display.

TAKING MEASUREMENT

The meter starts when the power is

turned on and updates readings every
second. When the operating
environment changes quickly (ex.
going outdoors on a cold day), it can
takes 30 seconds

for the CO

2

level to
change and u p to 30 minutes for RH.
NOTE: Do not hold the meter close to
your

face. Exhalation affects the CO

2

levels.

5

CO

2

AM

OPERATION

CO2 (Carbon Dioxide)

RECALL

to switch the mode to CO2.

You can view the CO2 reading in ppm o

n

the main display (Fig.4). The lower

display shows the real time clock.

Press

MODE

Fig.4

Fig.5

CO (Carbon Monoxide)

RECALL

to switch the mode to CO.

You can view the CO reading in ppm
on the main display (Fig.5). The lower
display shows the real time clock.

AIR, DP, WB Temperature

Press

MODE

to switch to temperature
display (Fig.6). You can view the dew
point temperature, and next the wet bul

b

temperature (Fig.7). The lower displa

y

shows the real time clock.

Press

MODE

RECALL

Fig.6

Fig.7

Humidity

Press

MODE

to switch to humidity display

RECALL

(Fig.8).The lower display shows the real
time clock.

Fig.8

6

%rh

WBT

O

C

TA

O

C

PM

CO

AM

CO

2

AM

STEL, TWA and current value in turns.

Each press of displays MIN, MAX,
STEL, TWA, current value in sequence.
(Fig.10~12). To return to normal mode,

press the

START

key to escape (Fig.13).

CURRENT MIN,MAX,STEL,TWA REVIEW

This meter allows you to check the
minimum, maximum, STEL, TWA and
current value from the moment you pres

s

the

M X/AVG

key. Under normal mode, press

BACKLIGHT
The backlight will be activated for 10
seconds by pressing any key.

DATA HOLD

In normal display mode, press

HOLD

to
freeze the readings, "HOLD” icon is
flashed on the left top of LCD(Fig.9). Al

l

current readings are kept unchanged.
Press

HOLD

again to cancel the hold

function.

Fig.9

N

M

X/AVG

N

to see the minimum, maximum,

M

X/AVG

N

ESC

If the meter is turned on for shorter than

15 mins, the STEL and TWA values will b

e

the weighted average of readings take

n

since power on. The actual TWA value

s

will appear after 8 hours.

It takes at least 5 mins to calculate STE

L

and TWA. The display will show “----”
during the first 5 minutes after power on.

While in “HOLD” mode, STEL and TWA

will update every 5 mins.

7

HOLD

%rh

AM

The m eter also

allows you to check the

min/max/STEL/TWA v alues calcul ated
since power on. Under normal mode
press to see min/max/STE L/TWA
and real time sequence. Each pr ess of
the displa ys the sequen ce in turn,
then returns to the current mode
(Fig.10~13).

STEL and TWA are calculated for CO2 only.
In this mode, press to switch the

displayed parameters (Fig 14).
Press the key to leave this mode and

return to normal mode.

You can tell between the normal display

and current review by checking the time
display format. In normal display, the
date & time display in turns. In current
review, the time display is the
accumulated time of how long you are i

n

max/min mode.

Fig.11

Fig.10

Fig.13

Fig.12

NOTE:

“MANUALY RECORD &

“RECALL” FUNCTIONS
ARE DISABLED IN
MIN/MAX/AVG MODE.

NOTE:
TWA & STEL ARE FOR
CO2 ONLY.
MIN/MAX ARE FOR ALL
PARAMETERS.

Fig.14

8

CO

MAX

CO

2

AM

CO

2

CO

2

T

WA

CO

2

RECORDING DATA

The meter features a 99 point memory.

In normal or hold mode, Press

MEM

key

to record.

icon and main display

flash for about 3 seconds. The main

display shows the memory serial number

up to 99 points ((Fig. 15).

Each memory contains all parameters

(CO2, CO, TA.....%RH), not only the

parameter you choose to see on the main
display.

If the reading change

s

quickly, you can press

HOLD

to freeze the

reading before

manually recording

Fig.15

the data.

The manually recording function is
disabled in min/max mode.

99 MEMORY RECALL

The meter has 99 memor y locations

that can be saved and reviewed.

In normal or hold mode, press

MODE

key

RECALL

for more than 2 seconds until the

icon flashes.

Press or to scroll through the

memories. The memory serial number

displays on the main LCD first and readings
come after (Fig.16 & 17).

Rec al l

Rec al l PM

Fig.16

Fig.17

9

CO

2

Re ca ll

TA

REC

AM

REC

Press

MODE

key to switch the display

RECALL

parameter (Fig.18).

Fig.18

Rec al l PM

The time displayed in memory recall

mode is the recording time of this
memory.

To leave the memory recall mode,
press

ESC

key to exit and return to

the

normal display.

ALARM

The meter features an audible alarm to
give warnings when CO concentration
exceeds the limit. (See P.20 in setup
for setting alarm threshold). It emits
beeps (approx. 80db) if the CO level
goes over the set value and stops only
when the readings fall below the set
value. It beeps again if the value goes
over the limit.

DATA LOGGING

The meter can automatically record
readings of CO2/CO/TEMP/RH for long
time environment monitoring. The
memory capacity is 8,000 points. Users
can set that sampling rate from 1 second
to 4 hours 59 minutes and 59 seconds
(See SETUP Section).

START

After sampling rate is selected, press

for 2 seconds under normal

START

ESC

mode to start logging. The

REC

icon

flashes to indicate the logging status
and LCD main display shows the real
time CO

2 value. Lower displays are th

e

real time clock (Fig.19).

10

CO

Fig.19

To terminate data logging, press

for 2 seconds,

REC

icon stops flashing.

The meter will only record one session

at a time. Once

REC

record mode is

activated all previous data is erased.
Download logged data on a PC

prior to

recording another data log.

The meter turns off automatically after

20 minutes of inactivity. To override th

e

function, hold down and at
the same time for 2 seconds until “n”
appears (Fig.20).

NOTE: AUTO POWER OFF IS
DISABLED DURING CALIBRATION.

Fig.20

Fig.21

When the meter is off, hold down

for more than 1 second to enter setup
mode.

Press or to scroll through the
setup options.

Press to exit setup mode.

11

SETUP

AUTO POWER OFF

CO

2

REC

P10 CLEAR MEMORY

When entering setup mode, P10 and

“CLr” (Fig.21) are displayed on the LCD.

Press

N

to go into P11 and decide to

M

X/AVG

clear or keep all the manual records.

The current set will be blinking on LCD

(Fig.22).

Press or to choose NO or YES

HOLD MEM

and press

N

to confirm.

M X/AVG

Fig.22

Press

START

to return to P10.

ESC

P20 CO ALARM

When entering setup mode, P20 and

“ALAr” (Fig.23) are displayed on LCD.

Press

N

to go into P21 and set the

M

X/AVG

CO alarm threshold. The current set

value will blink on the LCD (Fig.24).

Press

HOLD

to increase the value or

MEM

to decrease. The selectable alarm

limits are 15~200ppm. Each press is
5ppm. When the preferred alarm value

is set, press

N

to save the setting or

M

X/AVG

START

without saving and return to P20

ESC

Fig.23

Fig.24

12

CO

CO

Press

START

to return to P30.

P30 TEMPERATURE UNITS

When entering setup mode, P30 and

“unit” (Fig.25) are displayed on the LCD.

Press

N

to go into P31 and select the

M

X/AVG

temperature units in 0C or 0F.

The current set will display on LCD

(Fig.26).

Press

HOLD

or

MEM

to pick 0C or 0F

and press

M

X/AVG

N

C

Fig.25

Fig.26

ESC

P40 LOGGING SAMPLING RATE

Go into P40 for setting sampling rat

e

of data logging (Fig.27). The range
is from 1 second to 4 hours 59
minutes and 59 seconds.

N

Press

M

X/AVG

and it goes into setting

with blinking Hour digits on the lower
display. To change the digit, press

HOLD

to increase and

MEM

to decrease. Press

to confirm and enter Minute setting.

M

X/AVG

N

N

Press

M

X/AVG

again to confirm and ente

Second setting (Fig.28). Press
to confirm the rate setting or

N

M X/AVG

START

ESC

without saving and return to P40.

Fig.27

Fig.28

13

TA

O

TA

P50 PRESSURE COMPENSATION

When entering setup mode, P50 and

“PrES” (Fig.29) are displayed on the LCD.

Press

N

to set pressure compensation

M

X/AVG

value for CO2 measurement.

The current set will flash on LCD

(Fig.30).The barometric pressure uni

t

is kpa.

Press

HOLD

or

ME

M

to adjust the pressure

value and press

to confirm.

M

X/AVG

N

Fig.30

Fig.29

Press

START

to return to P50.

ESC

P60 REAL TIME CLOCK

Go into P60 to set the real time clock.
Press to enter into P61 to set the

time format as 12 or 24 hour. The current

setting will flash on the LCD. Press
or to change the format and press
the key to confirm.

NOTE: Date format is YY/MM/DD

The date will show on the lower display
with the year digit blinking. Press

to

increment or to decrement the
digits.

Use the same process to set the month

and day. Press to return.

Fig.31

Fig.32

14

PM

CO

2

CO

2

The meter is calibrated at standard

400ppm CO2 concentration at the
factory. You should manually calibrate
regularly to maintain good accuracy.

NOTE:

When accuracy becomes a concern afte

r

long use, you can return the meter to

CO2Meter, Inc. for standard calibration.

For succes sful manual calibration, it

should only be completed

with the meter

located i n fresh, outdoor air. Start with
the unit powered off.

First press

START

+

MEM

then also

ON/OFF

SET

ESC

simultaneously for 3 seconds to turn on

the meter and enter calibration mode

(Fig.33).

Press or to choose

from humidity, CO or CO2 calibration

menus.

Press

key to select the

calibration. 400ppm and

icon
will blink on the screen.

(Fig.34).

Wait about 10 minutes until the blinking

stops and the calibration is completed
automatically. To abort the calibration,

press at any time.

NOTE:

Ensure the batteries are fully charged or
meter is plugged in during calibration to
prevent interrupted or failed calibration.

15

CAL

IMPORTANT:

Do not calibrate the meter in air wit

h

an unknown CO2 concentration.
Otherwise, it will be calibrated as
400ppm by default which will lead

to inaccurate measurements.

CO2 CALIBRATION

Fig.33

Fig.34

The meter defaults to be calibrated the

humidity with 33% and 75% salt solution

.

The ambient condition is recommended
to be at 25oC and stable humidity(better
to be close to the calibrating value). To

abort calibration, just turn off the meter.

33% calibration

Plug the sensor probe into 33% salt

bottle. First press

START

+

MEM

, also

ON/OFF

SET

ESC

simultaneously for 3 seconds to turn on

the meter and enter calibration mode

(Fig.33).

Press or to choose

the 33% humidity calibration menu.

Press to select 33% calibration

(32.8% if at 25

o

C) and to start.

Meter is now calibrating, and will finish

in about 60 minutes when “CAL” and
humidity stop blinking. To abort
calibration, press at any time.

75% calibration

Plug the sensor probe into 75% salt
bottle and enter calibration mode. In
calibration mode, press

HOLD

to select
75% calibration (Fig.35), press to
begin.

M X/AVG

N

16

CAUTION:

Do not calibrate the humidity without
the default calibration salt. Otherwise

,

it will cause permanent damage.
Contact CO2Meter, Inc. for calibration

salt or services.

RH CALIBRATION

CO

2

CAL

%rh

CAL

“CAL” and calibrating value (75.3% if at

25oC) are blinking on the LCD.

Meter is now calibrating, and will finish

in about 60 minutes when “CAL” and
humidity stop blinking. To abort

calibration press at any time.

Fig.35

CAL

When the accuracy becomes a concern

after a long time usage, return to dealer

s

for standard calibration. It is necessary

to have standard CO gas for calibration.

Place the meter in the calibration site.

First press

START

+

MEM

then also

ON/OF

ESC

SET

simultaneously for 3 seconds to turn on

the meter and enter calibration mode
(Fig.33).

Press

HOLD

or

MEM

to select the CO

0ppm or 400ppm calibration. ppm and

“
Press

“ icon will blink on the LCD.

to start the calibration

M

X/AVG

N

(Fig.36 & 37).

Wait about 10 minutes until the blinking

stops and the calibration is completed
automatically. To abort the calibration,
press at any time.

17

CAL

CAUTION:

Do not calibrate the meter in the ai

r

with unknown CO concentration.
Otherwise, it will be calibrated as
0 or 400ppm by default and leads t

o

inaccurate measurements.

CO CALIBRATION

%rh

Fig.36

Fig.37

NOTE: 400ppm calib ration gas c an

vary from 385~415ppm (400+15ppm)

? Cannot power on

-Press

SET

for more than 3 seconds

ON/OFF

and try again.

-

Check whether batteries are in good

contact and correct polarit

y, or the

adaptor is plugged in correctly.

-You may also take out the batteries for
10 mins and then put them back in
again.

? Fixed readings

Check whether data hold is activated.
(HOLD icon displayed)

? Slow response

Check whether the air flow channels on
the rear are blocked.

? Error messages

E01/E33: CO2 sensor is out of order. Try

new battery first.
E02: The value is under range.
E03: The value is over range.
E04: The original data error results in

this error (DP, WB)
E11: Retry humidity calibration.
E16: Retry CO calibration.
E31: Temperature sensor or

AD damaged.

E32: Memory IC damaged.
E33: Humidity sensor or circuit damaged.

18

TROUBLESHOOTING

CO

CAL

CO

CAL

Connect the logger to PC, users can do

logging setting and data transmission

with the included software.

Plug the USB cable into the socket at

the right side of the meter and the othe

r

port to PC. Then install the software i

n

your PC with the following procedure.

1.Insert the CD Rom and run installation.

Select a preferred directory and click

“Next” step by step and finish it.

2. After the software installation is

completed, it will run USB drive

r

installation next.

19

PC CONNECTION

logger connection automatically and
indicate the COM Port information at

the bottom of the main screen as well
as the COMPort setting column.

Logger Settings

To set up logging plan, click “Setting”
icon and select “Logger”. The setting
page is opened.

Users can set up the logger identifier
number. Click OK for setting and Exit
the screen to confirm the settings.

20

Software Operation

Auto-Connect

Start the software and it will detect

Data Transmission

To transmit auto recorded data from th

e

meter, click “Download” icon on the lef

t

top side of the main screen. All auto­recorded data in the logger will be
transmitted. The raw data with time
stamp will display at the lower part of

the screen and the graph in the middle.

In the Graph display, the Y-axis indicates

Temp, RH, DP, WBT, CO2 & CO level in
different line colors. And the X-axis can
be switched to show Time or Record

number stamp.

Data Review Function

The following functions help to view

the GRAPH data in more detailed way.

Under View function, there are 4 tools

to enlarge the Graph data for detaile

d

data review.

Zoom in: Hold down “Ctrl” key on the

PC keyboard and click any target point
on the graph. It enlarges the point in

each click.

21

Zoom window: Hold down “Ctrl” key and

drag click the left button of the mouse to
select an area on the Graph and the
selected area will be enlarged.

Zoom X-axis: Hold down “Ctrl” key and
drag click the left button of the mouse to
select an area on the Graph and the
X-axis of the selected area will be

enlarged.

Zoom Y-axis: Hold down “Ctrl” key and

drag click the left button of the mouse t

o

select an area on the Graph and the
Y-axis of the selected area will be

enlarged.

Three icons on the right top side of the
main screen:

Redraw: After any review and zooming

on the Graph, click “Redraw” to reset i

t

to original format.

Clear: Click “Clear” to delete all data

and Graph on the window. A warnin

g

box shows up for confirmation. Pres

s

“Yes” and all data will be cleared.

Cursor: Switch Cursor ON and it shows

the raw data with the cursor. In any clic

k

on the graph, the digital data displayed

.

Switch OFF to disable the function.

22

Load: To retrieve saved files, just click

“Load” and select a desired file and it
will be loaded in the main screen with
the file details at the left top side.

Data Processing

The downloaded data can be Saved or

Printed via “File” processing functions.

77597

0~9999 p pm,

(5001~9999 p pm o ut o f s cale r ange)

0~1000 p pm,

Measuring r ange

CO2

CO

Temperature

Relative H umidity

-20~60oC ( -5~140oF)

0.1%~99.9%RH

-20.0~59.9oC

-5.0~59.9oC

1ppm

, 0

.1oC/oF, 0 .1%RH

DP(Dew p oint t emp.)

WB(Wet b ulb t emp.)
Resolution

Accuracy

CO2

+30ppm+5% o f r eadin g

(

0 ~5000ppm)

Other r anges a re n ot s pecif ie d

+/- 10 ppm fo r le ss th an 100 ppm
+/- 10% or readin g fo r 101~500 ppm
+/- 20% of readin g fo r 501ppm and above

+0.6oC/+0.9oF

+3%RH

(at 2 5oC, 1 0~90%RH) ;

+ 5%RH

( a t 2 5oC , o th er r ange

)

30 s econds

CO

Temperature

Relative H umidity

CO2 Warm-up t ime
Response t ime
CO2

CO

Tair
RH
LCD / Mete r siz e (mm

)

Operating c ondition
(avoid c ondensation)

Storage c ondition
Power s upply
Battery l ife

Weight

<30 s econds(90% s tep c hange)

<60 s econds(90% s tep c hange)

<2 m ins

(90% s tep c hange)

<10 m inutes ( 9 0% s tep c hange)

26(H)x44(L), 205(L)x70(W)x56(H)

-20 t o 5 0 ° C ( CO2 s ensor),0 t o 5 0 ° C ( CO s ensor)

-20 t o 6 0 ° C ( for t he r est p arameters)

-20~ 6 0oC,10~90%RH(avoid c ondensation)
AA

x 4

pcs o r 9 V a daptor

> 2 4 h ours ( Alkaline b attery)

200g

Standard p ackage

Meter, m anual , AA b at.,USB c able & CD, c arry c ase

23

SPECIFICATIONS

Non-Enforced Reference levels

NIOSH recommendations
400 ppm: normal outdoor ambient air

CO2 concentrations

600 ppm: normal indoor air quality
1,000+ ppm: indicates inadequate

ventilation; complaints such as
headaches, fatigue, and
eye/throat irritation will be more
widespread. 1000 ppm should b

e

used as an upper limit for indoor

levels.

EPA Taiwan: 600ppm and 1,000ppm

Type 1 In indoor areas such as department

stores, theaters, restaurants, libraries
the acceptable CO

2 concentration of 8

hours average (TWA) is 1,000ppm.

Type 2 indoor areas with special requirement

s

of good air quality such as schools,
hospitals, day care centers, the

suggested CO2 level is 600ppm.

Regulatory Exposure Limit

ASHRAE Standard 62-1989: 1,000ppm

CO2 concentrations in occupied buildings
should not exceed 1,000ppm.

Building bulletin 101 (BB101): 1,500ppm
UK standards for schools say that CO

2

levels averaged over the whole day (TWA, i.e

.

9am to 5pm) should not exceed 1500ppm.
OSHA: 5000ppm

Time weighted average over five 8-hour work

days should not exceed 5,000ppm.

Germany, Japan, Australia, UK: 5,000ppm

8 hours weighted average in occupational

exposure limit is 5,000ppm.

24

CO2 LEVELS AND GUIDELINES

ppm

Symptoms and applicable standard

Maximum allowable concentration per
62-1989 for

living area.

exposure per California OSHA

level per US OSHA workplace standards.

exposure in any 8 hrs average level per

space if the CO concentration exceeds

dizziness w/i 2-3 hrs.

after 3hrs. Maximum concentration
standards.

w/i 2-3 hrs.

25

0-1

Normal background levels

9

Maximum indoor air quality level:
ASHRAE Residential standards

25

Maximum limit 8 hrs of continuous

workplace standards.

35

Maximum 8 hrs average exposure

50

Maximum concentration for continuous
OSHA standards.

100

Remove employees from enclosed
100ppm per OSHA exposure limit.

20 0

Mild headache, fatigue, nausea and

40 0

Frontal headache, life threatening

in flue gas per the US EPA and AGA

80 0

Dizziness,

nausea,

convulsions,

death

1600

Nausea w/i 20 min.,death w/i 2-3 hrs

CO LEVELS AND GUIDELINES

The meter comes with a one (1) year

warranty starting from the date the
meter was shipped to the bu ye r.

During this period of time, CO2Meter
warrants our products to be free from
defects in materials and workma nsh ip
when used for their intended purpose,
and agrees to fix or replace (at our

discretion) any part or product that fails

under normal use. To take advantage
of this warranty, the product must be
returned to CO2Meter.com at your
expense. If, a fter examination, we
determine the product is defectiv e, we
will repair or replace it at no add itional
cost to you.

This warranty does not cover any
products that have been subje cted to
misuse, neg lect, accident,
modifications or repairs by you or by a
third party. No employee or reseller of
CO2Meter.com’s produ ct s ma y alter
this warranty verbally or in writing.

All liabi lities under this agreement shall

be limited to the actual cost of the
product paid to CO2Meter.com. In no
event shall CO2Meter.com be l iable
for any incidental or consequential

damages, lost profits, loss of time, lost
sales or loss or damage to data, injury

to person or personal property or any

other indirect damages as the result of

use of our products.

26

LIABILITY

WARRANTY

If the product fails under normal use

during the warranty period an RMA

(Return Material Authorization) number
must be obtained from CO2Meter.com.

After the item is received,
CO2Met e r. c o m w il l rep a i r or re p la ce
the item at our discretion.

To obtain an RMA number, call us at
[phone] or email us at

[email protected]

. When

requesting an RMA number, please
provide the reason for return and the
original order number

If we determine that the product has
failed because of improper use (wate r
damage, dropping, tampering,
electrical damage, etc.) or if it beyond

the warranty date, we will inform you of

the cost to fix o r replace the product.
For more inform atio n vi sit our w e bsite:

www.CO2Meter.com/pages/faq

Contact us: We’re here to help!

If the troubleshooting guide above
doesn’t help you solve your problem or
for more information, please contact us
using the information below.

[email protected]

(386) 256

-4910 Technical Support

(386) 872

-7665 Sales

27

RETURN AUTHORIZATION