Extech Instruments CO260 Manuale utente

User Manual

Carbon Monoxide (CO) and Carbon Dioxide (CO2) Meter

With Air Temp/RH Measurements and Dew Point/Wet Bulb calculations

Model CO260

Additional User Manual Translations available at www.extech.com

CO260-en-GB_v1.0 8/17

Introduction

Thank you for selecting the Extech CO260 Meter. The CO260 measures CO2(Carbon Dioxide)

levels, CO (Carbon Monoxide) levels, air temperature, and relative humidity. The CO260 also

displays dew point and wet bulb temperatures, generated from calculations performed on

temperature and humidity measurements. The CO260 is an ideal instrument for indoor air

quality (IAQ) analysis.

This device is shipped fully tested and calibrated and, with proper use, will provide years of

reliable service. Please visit our website (www.extech.com) to check for the latest version and

translations of this User Manual, Product Updates, and Customer Support.

Features

•Adjustable carbon monoxide warning level

•Designed with NDIR (non-dispersive infrared)

•Long life electrochemical sensor

•Audible and visual alarm

•Backlit LCD for easy viewing in dimly lit areas

•Low battery indicator

•Auto power off

•Mini USB connector

•Manual and automatic recording

Safety Information

IMPORTANT CARBON MONOXIDE (CO) SAFETY NOTES

•The CO260 Carbon Monoxide Monitor is intended for general purpose Air Quality monitoring

only, and has not been certified for use pursuant to any state or city safety Carbon Monoxide

Alarm or Monitoring requirements.

•The CO260 Carbon Monoxide Monitor has not been tested by an independent lab to comply

with the UL 2034 or IAS 6-96 standard.

•It is the responsibility of the customer to obtain and apply current local, state, and national

regulations with regard to CO alarms, monitoring and testing.

•Electromagnetic (EMI) interference my cause erratic meter readings; do not place meter near

areas of high EMI when taking CO measurements.

•Recovery time is required after the meter has been exposed to high levels of CO; the longer

the exposure, the longer the recovery time.

Carbon monoxide is life threatening even at relatively low concentrations; learn

and recognize the effects of CO poisoning (see Table below). Do not use this

meter as a personal safety-monitoring device.

CO260-en-GB_v1.0 8/17

Effects of Carbon Monoxide (CO) poisoning

Warning: Ensure that the meter is powered, at room temperature, and in an area free of

Carbon Monoxide (CO) before starting measurements. If not, the meter will read

incorrectly when subsequently measuring CO.

0-1 PPM Normal background levels

9 PPM Maximum allowable short term exposure

50 PPM Maximum allowable continuous exposure level in any 8-hour

period, according to OSHA

200 PPM Mild headache, fatigue, nausea and dizziness after 2-3 hours

400 PPM Frontal headache with 1-2 hours, life threatening after 3 hours

800 PPM Dizziness, nausea, convulsions within 45 minutes. Unconsciousness

within 2 hours. DEATH WITHIN 2 TO 3 HOURS

1600 PPM Headache, dizziness, nausea within 20 minutes, DEATH WITHIN 1

HOUR

3200 PPM Headache, dizziness, nausea within 5-10 minutes. DEATH WITHIN

25-30 MINUTES

6400 PPM Headache, dizziness, nausea within 1-2 minutes. DEATH WITHIN

10-15 MINUTES

12800 PPM DEATH WITHIN 1 TO 3 MINUTES

Regulatory exposure limits for Carbon Dioxide (CO2)

ASHRAE Standard 62-1989: 1000ppm: CO2concentration in occupied building should not

exceed 1000ppm.

OSHA: 5000ppm: Time weighted average over five 8-hour workday should not exceed

5000ppm.

Building bulletin 101 (BB101): 1500ppm. UK standards for schools state that CO2averaged

over the whole day (i.e. 9:00am to 3:30 pm) should not exceed 1500ppm.

Germany, Japan, Australia, UK: 5000ppm, 8 hours weighted average in occupational exposure

limit is 5000ppm.

EPA Taiwan (Type 1): Indoor areas such as department stores, theaters, restaurants, libraries

have acceptable CO2concentration of 1000ppm over an 8-hour average period.

EPA Taiwan (Type 2): Indoor areas with special requirements for good air quality such as

schools, hospitals, and day care centers have suggested CO2level of 600ppm.

CO260-en-GB_v1.0 8/17

Descriptions

METER

1. Temperature and Humidity sensor

2. Primary display

3. Secondary display

4. Power and Set button

5. Start and Escape button

6. Mode and Recall button

7. Min-Max-Avg and Enter button

8. Memory and Down button

9. CO and CO2 sensors (on rear of meter)

10. Hold and Up button

11. AC Adaptor and Micro USB ports

Battery compartment on rear of meter

LCD DISPLAY

LCD SYMBOLS

CO2 Carbon dioxide

CO Carbon monoxide

TWA Time weighted average (8 hours)

STEL Short-term exposure limit (15 minutes weighted average)

HOLD Freezes current reading on display

MIN/MAX Minimum/Maximum readings

Low battery indicator

DP Dew point temperature

TA Air temperature

WBT Wet bulb temperature

%RH Relative humidity

C or F Celsius/Fahrenheit

CAL Calibration Mode

REC Manual/automatic data logging

RECALL View manually logged data

CO260-en-GB_v1.0 8/17

KEYPAD

POWER ON/OFF, SET

Short press to power the Meter ON or OFF

With the meter OFF, long press to enter setup mode

Long press /SET and H/



to enable or disable APO mode

START/ESCAPE

Short press to exit setup mode

Long press to begin data logging

MODE/RECALL

Short press to change the display modes

Long press to recall manually stored readings

HOLD/UP ARROW

Short press to freeze or unfreeze reading on the display

Short press while in setup mode to select units or increase the

value

Long press /SET and H/



to enable or disable APO mode

MEMORY/DOWN ARROW

Short press to save readings into memory

Short press in setup mode to select units or decrease the

value

MIN/MAX/AVG/TWA/STEL, SAVE

Short press to select MIN, MAX, TWA, STEL function

Short press in setup mode to save settings

Battery Installation

•Four (4) ‘AA’ batteries or an AC/DC adaptor powers the meter.

•Install the batteries into the rear battery compartment observing correct polarity.

•When the adaptor is used, the batteries are disconnected from the meter circuitry. The

adaptor cannot be used to charge rechargeable batteries.

•When battery voltage is low, the battery symbol ( ) appears. Replace the batteries

promptly.

Never dispose of used batteries or rechargeable batteries in household waste.

As consumers, users are legally required to take used batteries to appropriate collection sites, the

retail store where the batteries were purchased, or wherever batteries are sold.

Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-

of-life devices to a designated collection point for the disposal of electrical and electronic

equipment.

CO260-en-GB_v1.0 8/17

Powering the Meter

Short press the /SET button to turn the meter ON or OFF. At power up, the meter emits a

short beep and performs a 30-second warmup before entering normal operating mode. After

the countdown, the primary LCD will display the current readings. The secondary display will

alternate between the current date and time.

Taking Measurements

The meter begins measuring in the selected mode, when powered on, and the sensor responds

every 1 second. If the operating environment changes (example: from high to low temperature),

it requires 30 seconds for the CO2sensor to respond and up to 30 minutes for the relative

humidity sensor to respond.

Measuring Carbon Dioxide (CO2)

1. Short press the M/REL button to change the mode to CO2if necessary.

2. To take a measurement, trace the CO260 around the area of the suspected leak.

3. The meter indicates the presence of carbon dioxide (CO2) in ppm in the primary display. The

secondary display indicates the current date and time alternately.

NOTE: Do not hold the meter close to your mouth or any other source of CO2.

Measuring Carbon Monoxide (CO)

1. Short press the M/REL button to change the mode to CO, if necessary.

2. To take a measurement, trace the CO260 around the area of the suspected leak.

3. The meter indicates the presence of carbon monoxide (CO) in ppm in the primary display.

The secondary display indicates the current date and time alternately.

4. The display will flash and an audible beeper sounds at 25 ppm alerting the user to

dangerous CO levels. The higher the concentration of CO, the faster the beeper will sound.

The display will stop flashing once the measured CO is below the alarm limit value.

Measuring Air Temperature and Calculating Dew point and Wet bulb

1. Short press the M/REL button to change the mode to air, dew point, or wet bulb

temperature.

2. To take a measurement, trace the CO260 in the testing area.

3. The primary display indicates the air temperature, dew point, or wet bulb temperature

depending on the selected mode. The secondary display indicates the current date and time

alternately.

4. Note that Dew Point and Wet Bulb Temperature displays are calculations made from Air

Temperature and Relative Humidity measurements.

Measuring Relative Humidity %

1. Short press the M/REL button, if necessary, to change the mode to Relative Humidity.

2. To take a measurement, place the CO260 in the testing area.

3. The primary display indicates the relative humidity measurement and the secondary display

indicates the current date and time alternately.

CO260-en-GB_v1.0 8/17

Advanced Functions

Data Hold

Short press the H/button to freeze the readings on the display. The "HOLD” icon flashes in the

top left of the display. Short press the H/button again to unfreeze the readings on the display.

Note: the HOLD function is not operational in Min/Max/Avg mode.

Display Backlight

The meter is equipped with a backlight for easy viewing in dimly lit areas. The backlight will

activate for 10 seconds by pressing any button.

MIN, MAX, STEL, TWA Recording

In normal operating mode, short press the MXMN/AV/button to view the minimum,

maximum, weighted average, and current readings. With each short press of the MXMN/AV/

button, the meter displays the MIN, MAX, STEL, TWA, or current value along with elapsed timer,

in sequence. Short press the /ESCbutton to return to normal operating mode.

In MIN and MAX modes, the meter shows the lowest (minimum) or highest (maximum) reading

in the primary display.

In STEL and TWA modes, the main display shows the weighted average of readings for the past

15 minutes (STEL) or 8 hours (TWA). TWA and STEL mode are only operational in CO2 mode.

In CURRENT mode, the primary display shows the current readings. The secondary display shows

the elapsed timer. Press the /ESC button to exit and return to normal operating mode.

NOTES:

1. If the meter is ON for < 15 minutes, the STEL value will be the weighted average of

readings taken since power on. Similarly, for the TWA mode when the meter has been

ON for < 8 hours, the display only shows a weighted average of the readings up to the

moment.

2. The CO260 requires at least 5 minutes calculating STEL and TWA. The display shows “----”

during the first 5 minutes from power ON.

3. While in HOLD mode, the STEL and TWA values will continue to update every 5 minutes.

4. Hold, Record, and Recall functions are not operational while in Min/Max/Avg mode.

5. TWA and STEL will function only in CO2mode

6. The unit of measure can be changed while in Min/Max mode.

Manual Data Recording

The CO260 has 99 memory locations for which to store readings one at a time.

1. While in normal operating mode or hold mode, short press the MEM/button to store

a reading. The REC icon flashes on the display for approximately 3 seconds. The primary

display briefly shows the memory location.

2. Each measurement parameter is saved, not just the currently displayed parameter. (For

example, when recording CO readings, the CO2, %RH, and air temperature will also be

recorded).

3. Short press the H/button to freeze the readings on the display before recording the

data if the readings change too quickly.

CO260-en-GB_v1.0 8/17

Note: The manual recording mode is not operational in Min/Max mode.

Recalling Manually Stored Readings

The meter can recall up to 99 previously saved readings.

1. While in normal operating mode, long press the M/RCL button until ‘Recall’ flashes on

the display.

2. Short press the H/or MEM/buttons to scroll through the memory locations. The

selected memory location will flash for approximately 3 seconds and then the stored

reading will display on the screen.

3. Short press the M/RCL button to change the displayed measurement parameter.

4. The secondary display shows the time and date the data was recorded into memory.

5. To exit memory recall mode, short press the /ESC button.

Automatic Datalogging

The CO260 automatically records CO2, CO, Temperature, or RH readings and can store up to

32,000 records. The sample rate can be set from 1 second to 4 hours 59 minutes and 59 seconds.

See ‘Setup Mode’ for information on setting the sample rate.

1. After the sample rate is selected, long press the /ESC button to begin logging. The ‘rec’

icon flashes and the primary display shows the real time value. The secondary display

shows the current time and date alternately.

2. Short press the M/RCL button to select a different measurement mode to record.

3. To exit the datalogger mode, long press the /ESC button. The ‘rec’ icon stops flashing.

Notes:

Previous records are overwritten any time logging is started.

The M/RCL button is the only button that is operational while in datalogging mode.

CO Alarm

The meter features an audible alarm (80db beep) that warns when CO concentration exceeds

the set limit. The beeper stops when the readings fall below the limit. The meter beeps again if

the value exceeds the limit. See the section ‘Setup Mode’ for more information.

Auto Power OFF

The meter turns off automatically after 20 minutes of inactivity. To override the function, long

press both the /SET and H/buttons while powering ON the meter until “n” appears in the

display.

NOTE: Auto power off is not operational while in calibration mode.

CO260-en-GB_v1.0 8/17

Setup Mode

While the meter is OFF, long press the /SET button to enter the setup mode.

To exit the setup mode, short press the /ESC button at any time during setup.

P10 Clearing the Manual Recording Memory

Clearing the memory will erase ALL the manually stored records.

1. Upon entering setup mode, P10 and “CLr” display on the LCD.

2. Short press the MXMN/AV/button to advance to P11 and make a selection.

3. Short press the H/or MEM/button to select YES or NO. ‘YES’ will erase all the

manually stored records.

4. Short press the MXMN/AV/button to save the selection and return to P10.

5. Short press the /ESC button to exit without saving.

6. Short press the H/button to advance to the next step.

P20 Setting the CO Alarm

1. When in alarm setup mode, P20 and “ALAr” are displayed. Short press the H/button

to advance to P20 if necessary.

2. Short press the MXMN/AV/button to advance to P21 and set the CO alarm threshold.

The current set value will blink on the display.

3. Short press the H/button to increase or the MEM/button to decrease the value.

The alarm range is from 15 to 200ppm and each press of the buttons will advance 5ppm.

4. Short press the MXMN/AV/button to save the selection and return to P20.

5. Short press the /ESC button to exit without saving.

6. Short press the H/button to advance to the next step.

P30 Changing the Temperature Units

1. When in temperature setup mode, P30 and “unit” display on the LCD. Short press the

H/button to advance to P30 if necessary.

2. Short press the MXMN/AV/button to advance to P31 and change the temperature

units. The current temperature unit displays on the LCD.

3. Short press the H/or MEM/button to toggle between °C and °F.

4. Short press the MXMN/AV/button to save the setting and return to P30.

5. Short press the /ESC button to exit without saving.

6. Short press the H/button to advance to the next step.

P40 Setting the Datalogging Sampling Rate

1. When in datalogging setup mode, P40 and “rAtE” display on the LCD. Short press the

H/button to advance to P40 if necessary.

2. Short press the MXMN/AV/button to advance to set the sampling rate for datalogging.

The hour digit will blink in the secondary display.

3. Short press the H/button to increase the time or short press the MEM/button to

decrease the time.

4. Short press the MXMN/AV/button to save the setting and advance to the minute

setup.

5. Short press the H/button to increase the time or short press the MEM/button to

decrease the time.

CO260-en-GB_v1.0 8/17

6. Short press the MXMN/AV/button to save the setting and advance to the second

setup.

7. Short press the MXMN/AV/button to save the settings and return to P40.

8. Short press the /ESC button to exit without saving.

9. Short press the H/button to advance to the next step.

Note: The datalogging sampling range is from 1 second to 4 hours 59 minutes 59 seconds.

P50 Changing the Barometric Pressure Compensation

1. When in pressure setup mode, P50 and “PrES” display on the LCD. Short press the H/

button to advance to P50 if necessary.

2. Short press the MXMN/AV/button to set the pressure compensation value for the CO2

measurement. The current pressure compensation value in hPa will flash on the LCD.

3. Short press the H/or MEM/button to adjust the barometric pressure value. The

pressure compensation range is from 70 to 199 hPA.

4. Short press the MXMN/AV/button to save the setting and return to P50.

5. Short press the /ESC button to exit without saving.

6. Short press the H/button to advance to the next step.

P60 Setting the Real-Time Clock

1. When in Real-Time Clock mode, P60 and “rtC” display on the LCD. Short press the H/

button to advance to P60 if necessary.

2. Short press the MXMN/AV/button to advance to P61 and set the time as 12-hour or

24-hour format. The current time format will flash on the LCD.

3. Short press the H/or MEM/button to change the format between 12-hour and 24-

hour.

4. Short press the MXMN/AV/button to save the setting and advance.

5. The year will flash in the secondary display. Short press the H/or MEM/button to

change the value.

6. Short press the MXMN/AV/button to save the setting and advance to the month

setup.

7. Short press the H/or MEM/button to change the value.

8. Short press the MXMN/AV/button to save the setting and advance to the next step.

9. Repeat the above steps to complete the setup for the month/day/hour/minute/second

settings.

10. Short press the MXMN/AV/button to save the selection and return to P60.

11. Short press the /ESC button to exit setup mode.

Calibration

RH CALIBRATION

The meter is calibrated to a standard 33% and 75% salt solution bottle. Calibration must be

performed in a controlled temperature environment of 25°C.

CAUTION: Do not calibrate the humidity without the default calibration salts. The meter will lose

its current calibration data and will become inoperable. Contact Extech to order calibration salts

or to inquire about calibration services.

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