USER MANUAL Digital CO Monitor Model CO30 Additional User Manual Translations available at www.extech.
EXTECH INSTRUMENTS Introduction 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.
EXTECH INSTRUMENTS Operation 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.
EXTECH INSTRUMENTS 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 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.
EXTECH INSTRUMENTS Relative Humidity Compensation Adjustment When 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.
EXTECH INSTRUMENTS Revert to Factory Default Settings When 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 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.
EXTECH INSTRUMENTS 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.
