Extech Instruments CO260 User Manual page 3

Carbon monoxide (co) and carbon dioxide (co2) meter with air temp/rh measurements and dew point/wet bulb calculations

Hide thumbs

Table Of Contents

Table of Contents

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

9 PPM

50 PPM

200 PPM

400 PPM

800 PPM

1600 PPM

3200 PPM

6400 PPM

12800 PPM

Regulatory exposure limits for Carbon Dioxide (CO

ASHRAE Standard 62-1989: 1000ppm: CO

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 CO

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 CO

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

schools, hospitals, and day care centers have suggested CO

Normal background levels

Maximum allowable short term exposure

Maximum allowable continuous exposure level in any 8-hour

period, according to OSHA

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

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

Dizziness, nausea, convulsions within 45 minutes. Unconsciousness

within 2 hours. DEATH WITHIN 2 TO 3 HOURS

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

HOUR

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

25-30 MINUTES

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

10-15 MINUTES

DEATH WITHIN 1 TO 3 MINUTES

concentration of 1000ppm over an 8-hour average period.

concentration in occupied building should not

level of 600ppm.

)

averaged

CO260-en-GB_v1.0 8/17

Table of Contents

Show Quick Links

Hide quick links:

Table of Contents

Need help?

Do you have a question about the CO260 and is the answer not in the manual?

Questions and answers

Cathy Cooke

January 23, 2025

How do I calibrate this meter?

1 comments:

Mr. Anderson

February 10, 2025

To calibrate the Extech Instruments CO260 meter for relative humidity:

1. Ensure calibration is performed in a controlled temperature environment of 25°C.
2. Plug the sensor probe into a 33% salt solution bottle.
3. Long press the ESC, MEM, and SET buttons simultaneously to enter calibration mode.
4. The LCD will blink "CAL" and display the current value (e.g., 32.8% at 25°C).
5. The meter will calibrate for about 60 minutes until the value stops blinking.
6. The calibration is complete once the value remains steady.

Caution: Do not calibrate without the default calibration salts, as this may cause the meter to lose calibration data and become inoperable. Contact Extech for calibration salts or services if needed.

This answer is automatically generated