CO30 - Meter Extech - Free user manual and instructions

Product Type	Carbon Monoxide Meter
Measurement Range	0 to 1000 ppm
Resolution	1 ppm
Accuracy	±5% or ±10 ppm (whichever is greater)
Sensor Type	Electrochemical
Display	Digital LCD with backlight
Alarm	Audible (85 dB) and visual (flashing LED)
Data Hold	Yes
Auto Power Off	After 15 minutes of inactivity
Low Battery Indicator	Yes
Power Supply	One 9V battery (approx. 200 hours continuous use)
Operating Temperature	0°C to 50°C (32°F to 122°F)
Storage Temperature	-20°C to 60°C (-4°F to 140°F)
Dimensions	160 x 83 x 38 mm (6.3 x 3.3 x 1.5 in)
Weight	180 g (6.3 oz)
Warranty	1 year
Included Accessories	Carrying case, 9V battery, instruction manual
Maintenance	Keep sensor clean; avoid exposure to solvents; recalibrate annually
Safety Standards	CE, RoHS compliant
Spare Parts & Repairability	Battery and sensor are user-replaceable; contact Extech for service

Frequently Asked Questions - CO30 Extech

How do I turn on the Extech CO30?

Press and hold the POWER button for approximately 2 seconds until the display turns on.

What does the alarm indicate?

The alarm sounds when CO concentration exceeds 35 ppm (OSHA limit) or as defined by local regulations. The meter will emit a loud beep and flash LED.

How often should I calibrate the CO30?

Extech recommends annual recalibration or after exposure to gas concentrations above 1000 ppm. Contact Extech or an authorized service center.

Can I replace the battery myself?

Yes. Open the battery compartment on the back, replace with a 9V alkaline battery, and close securely. Dispose of old battery properly.

What is the typical battery life?

A fresh 9V battery provides approximately 200 hours of continuous operation. Low battery indicator warns when replacement is needed.

How do I enable the backlight?

Press the LIGHT button to toggle the backlight on/off. It stays on for about 10 seconds after button press.

What is the measurement range and resolution?

The CO30 measures 0 to 1000 ppm with a resolution of 1 ppm. Accuracy is ±5% or ±10 ppm, whichever is greater.

Can I use the CO30 for continuous monitoring?

Yes. The meter can be left on for continuous monitoring. The auto power off feature can be disabled by pressing and holding the MODE button during power on.

How do I clean the sensor?

Use a soft, dry cloth to wipe the exterior. Do not use solvents or immerse the sensor. Avoid exposure to silicone vapors which can poison the sensor.

What accessories are included with the CO30?

The package includes the CO30 meter, a carrying case, one 9V battery, and an instruction manual.

USER MANUAL CO30 Extech

Thank you for selecting the Extech Instruments Model CO30. The CO30 is a 3-in-one Carbon Monoxide (CO), temperature measurement, and humidity measurement meter. 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 of this User Guide, Product Updates, and Customer Support.

Description

Meter Description

1. Compensation adjustment
2. Control button
3. AC Adaptor jack
4. LCD Display
5. LED indicator

Note: Tilt Stand, Wall mount access, and battery compartment located on rear of meter.

IMPORTANT SAFETY NOTES

The CO30 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 CO30 Carbon Monoxide Monitor has not been tested by an independent lab to comply with 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.

Powering the meter

If the meter is supplied without batteries installed, install the supplied batteries in the rear battery compartment to power the meter. Please observe proper polarity.

If the meter is supplied with the batteries installed, and a protective battery strip is installed in the battery compartment, remove the protective strip to power the meter.

Alternatively, plug the AC adaptor into the jack on the side of the meter and then into an AC power source to power the meter.

Normal Operation Mode

When switched ON, the LCD displays '0000' for a period of time, depending on the time that the meter has been inactive. The meter will then proceed to the normal mode of operation where the LCD displays the current CO levels in ppm, the Temperature (°C/°F), and RH% (relative humidity) alternately every 6 seconds.

Status Indicator LED

The Front panel status LED uses a color-coding system to inform the user as to the measured CO concentration; Green for Good (<10ppm); Yellow for Caution (10 to 29ppm); Red for Danger (>30ppm). If the LED fails to illuminate, please return the unit for service.

Control button

The Control button located on the left side of the meter is used to control and program a variety of meter functions. Press and hold the Control button for at least 3 seconds to access the Control Setup Mode. Repeated presses of the Control button cycle through the available parameters. These parameters, in order, are:

• ZERO Calibration
  • Temperature Unit selection (°C/°F)
  • Temperature compensation (used in conjunction with side potentiometer)
• Humidity compensation (used in conjunction with side potentiometer)
  • Alarm Beeper Threshold (25, 30, 35, 50, 100, 200 ppm)
  • Factory Default setting reset
• Escape/Return (abort and return to normal mode)

ZERO Calibration

Ensure that the Zero Calibration is performed in a clean air environment (no CO gases).

Press and hold the Control button for 3 seconds (until 'CAL' appears on the LCD screen) and then press and hold the Control button again to enter the calibration mode ('CAL' should appear on the display).

Release the Control button and wait approximately 20 seconds for the calibration to complete. The meter will display 'END' for 2 seconds when calibration is complete and will then return to the normal mode of operation.

Changing Temperature Units C/F

When [-F_2] is shown on the display, press and hold the Control button to display the current temperature unit. Momentarily press the Calibration Control button to toggle °C and °F units. To save setting, press and hold the Control button. The meter will return to the normal mode.

Temperature Compensation Adjustment

When SEE3 is shown on the display, press and hold the Control button. The factory default '0.0' value will flash. Turn the compensation potentiometer clockwise to increase the temperature offset or counterclockwise to decrease offset). The range is -5.4°F to +5.4°F (-3.0°C to +3.0°C). When done, press and hold the Control button to save the setting. The meter will return to the normal measurement mode and will reflect the offset when temperature readings are displayed.

Note: To perform an accurate offset adjustment, a standard reference is required for comparison.

Relative Humidity Compensation Adjustment

When SER4 is shown on the display, press and hold the Control button to enter the relative humidity compensation adjustment mode. Momentarily press the Control button to make a step change in the RH% offset; the range is -9 to +9 RH %. When done, press and hold the Control button to save the setting. The meter will return to the normal mode.

Note: To perform an accurate offset adjustment, a standard reference is required for comparison.

Warning: While performing temperature or RH% compensation adjustments do not touch the slotted openings on the meter housing, these are where the sensors are located. Otherwise, accuracy may be compromised.

Note: If the meter displays '...5' press the Control button to step to the next setting.

Alarm Beeper Threshold Selection

When bPr6 is shown on the display, press and hold the Control button. The factory default setting will flash. Momentarily press the Control button to choose a 25ppm, 30ppm, 35ppm, 50ppm, 100ppm, or 200ppm threshold. After the selection, press and hold the Control button to save and return to the normal mode.

The alarm beeper prompts personnel to evacuate an area because of the detection of unsafe concentrations of CO. The meter alarms when the CO concentration exceeds the default or user-programmed threshold.

The beeper may be temporarily silenced for approximately 4 minutes by pressing the Control button. After this time, if the meter continues to detect a CO concentration exceeding the threshold, it will alarm again. For safety purposes, the meter alarm function cannot be completely disabled.

Revert to Factory Default Settings

When rFSN is shown on the LCD display, press and hold the Control button to reset the CO30 to its default (factory) settings.

Escape/Return Function

When ESCB is shown on the LCD display, press and hold the Control button for 3 seconds to abort the current programming step and return to the normal measurement mode.

Maintenance

Low Battery Condition

When the battery icon (☐) appears on the LCD, the batteries must be replaced. If the meter is low on battery voltage, erratic or inaccurate CO concentration readings may result. Never use the meter with the low battery icon displayed.

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.

Troubleshooting Error Codes

The following errors may appear on the CO30 display:

E-1: CO measurement exceeds specified measurement range

E-2: Temperature measurement exceeds specified measurement range

E-3: Relative Humidity (RH %) measurement exceeds specified measurement range

Specifications

Display	Multifunction LCD displays CO concentration, Air Temperature, and Relative Humidity
Status LED indicator	Tri-color status indication (Green <10ppm, Yellow: 10 to 29ppm, and Red >30ppm)
CO measurement range	0 to 999ppm
CO accuracy	±5% of reading or ± 10ppm
CO Resolution	1ppm
Operating Temperature	0 to 50°C (32 to 122°F)
Temperature Resolution	0.1°C (0.1°F)
Operating Relative Humidity	0 to 95%RH
RH Resolution	1% RH
Temperature Accuracy	±1°C/1.8°F
Relative Humidity Accuracy	±5%
Storage Temperature	-20 to 50°C (-4 to 122°F)
Storage Humidity	0 to 95%RH (avoid condensation)
Alarm functionality	Meter beeps and displays the alarm bell icon when the CO level exceeds the alarm setpoint (default setpoint is 30ppm, user adjustable)
Temperature and RH Compensation	Manual; user-adjustable
CO Calibration	Standard user function
Zero Calibration	Standard user function
Power	4 x AAA batteries or supplied Universal AC adaptor
Meter dimensions	113 x 108 x 53mm (4.4 x 4.3 x 2.1 in.)
LCD display dimensions	48 x 28mm (1.9 x 1.1 in.)
Weight	159g (5.6 oz.)