English User`s Manual
Contents
1. Specifications Display Dual multifunction LCD CO measure range 0 to 9 999ppm CO accuracy 75ppm 5 of reading O to 2 000ppm Temperature range 10 to 50 C 14 to 122 F 0 1 resolution Temperature Accuracy 1 C 1 8 F Relative humidity range 10 to 90 RH Relative Humidity Accuracy 5 of rdg at 25 C 77 F otherwise 7 RH Dew Point Temperature range 72 9 to 47 C 99 22 to 118 F 0 1 resolution Wet Bulb Temperature range 11 to 48 2 C 12 2 to 118 8 F 0 1 resolution Power AAA batteries x 6 pcs or AC adaptor Dimensions 211 x 60 x 40 mm 8 3 x 2 4 x 1 6 Weight 181 4 g 6 4 oz Copyright 2014 2015 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form 150 9001 Certified www extech com 7 CO240 en GB_v1 6 3 152. long term drift as compared to the expected fresh air value of 400ppm The ABC period is 15 days during which the ABC function default is always on CO2 Alarm Setting Press and hold the SET button for 2 seconds to enter the high CO alarm threshold Press the HOLD button to increase the value and the Down arrow button to decrease the value Press the MODE button to select the digit to the left and press the MAX MIN button to select the digit to the right Once the desired value is set press the SET button for 2 seconds to save the alarm setting The LCD will return to its normal mode of operation The meter alarm limit default is 1000ppm OSHA Momentarily press the POWER button to toggle the alarm on and off Data Streaming to PC The CO240 features real time data streaming to a PC using the supplied SW200 S software When the meter is connected to a PC the USB icon will be visible on the LCD display Please install the USB driver and supplied software before attempting to stream data Refer to the Help Utility within the software program for further details 5 CO240 en GB_v1 6 3 15 EXTECH INSTRUMENTS Maintenance and Troubleshooting Battery Replacement When the battery icon appears on the LCD the batteries must be replaced In a downward motion slide the rear battery compartment cover off of the meter housing Remove the old batteries and replace with new batteries all of the same type observing correct polarity This meter
3. EXTECH USER GUIDE INSTRUMENTS Carbon Dioxide Meter Model CO240 EXTECH INSTRUMENTS Introduction Thank you for selecting the Extech Instruments Model CO240 The CO240 measures Carbon Dioxide CO2 Air Temperature and Relative Humidity It also calculates Dew Point Temperature and Wet Bulb Temperature The user programmable high alarm feature alerts the user when CO level rises above the programmed limit and the data streaming feature allows readings to be captured in real time by PC USB connection 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 Features e Portable meter measures CO Air Temperature and Relative humidity accurately e Measures CO 0 9 999ppm using NDIR Non dispersive Infrared Technology e Dual display indicates Relative Humidity Air Temperature and CO e Calculates Dew Point and Wet Bulb Temperature e Adjustable CO high alarm threshold with audible beeper e Tripod mount e USB cable for PC data streaming software supplied e Battery or AC Adaptor Powered 2 CO240 en GB_v1 6 3 15 EXTECH INSTRUMENTS Meter Description 1 Sensors 2 LCD Screen 3 HOLD Up Arrow Button 1 4 MODE 4 Left Arrow Button 5 SET Button 6 AC Adaptor jack ppm 7 Tripo
4. d Mount 3 000 8 POWER Button o M Max Min gt Right Arrow Button 10 UNIT Button 3 8 11 Y Down Arrow Button 4 9 12 USB PC interface port gt Battery compartment on rear of meter 6 WS 0240 CO240 en GB_v1 6 3 15 EXTECH INSTRUMENTS Operation Powering the meter Momentarily press the POWER button to power on the meter Hold the POWER button for 2 seconds to turn off the meter During measurement if the alarm is sounding audible beeper press the POWER button momentarily to turn off the beeper Press again to activate the beeper function The alarm beeper is set to ON by default The meter can be powered by 6 AAA batteries or AC Adaptor Recommendation For datalogging power the unit using an AC DC adaptor in order to conserve battery power Auto Power Off The CO240 will automatically turn off after 20 minutes of inactivity To disable the auto power off function With the meter OFF press and hold the HOLD button and then press the POWER button The LCD will show n and will then return to normal measurement mode Measurements When the meter is turned on a self test is implemented Due to the nature of the NDIR sensor it typically requires approximately ten minutes to obtain stable accurate readings If the USB cable is connected to the CO240 the USB symbol will be shown on the LCD The temperature and relative humidity readings will alternate on the lower LCD line a
5. long with the CO reading on the top display line Use the MODE button to switch to DP Dew Point Temperature and WB Wet Bulb Temperature modes lower display line Maximum and Minimum Readings Memory Momentarily press the MAX MIN button to review the maximum and minimum readings captured since the meter was powered on Pressing the button once will show the maximum value Pressing the button again will display the minimum value Pressing the button a third time will return the meter to its normal mode of operation While in MAX MIN mode press and hold the HOLD button for 2 seconds to reset clear the stored maximum and minimum values Selecting C F units of measure Press the UNIT button to select the desired temperature unit of measure Calibration Press and hold the SET UNIT buttons for 2 seconds to enter the self calibration mode Ensure that there is as little CO present as possible It is recommended that this be done in outside air The LCD will display CAL and will perform a 60 second countdown as it performs the calibration A reading of 400 is displayed as a normal CO level reference value during the calibration After the calibration has completed the meter will return to its normal mode operation 4 CO240 en GB_v1 6 3 15 EXTECH INSTRUMENTS Automatic CO2 Baseline Calibration ABC The ABC algorithm continually tracks the sensor s lowest reading over a fixed time interval and slowly corrects for any
6. uses six 6 1 5V AAA batteries Please replace the battery compartment cover before attempting to use the meter 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 ma Patteries 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 Battery Safety Reminders o Please dispose of batteries responsibly observe all relevant regulations o Never dispose of batteries in a fire batteries may explode or leak o Never mix battery types install new batteries of the same type Troubleshooting Error Message Displays Erratic Readings Replace the batteries or use the AC DC adaptor and check again ER1 Display CO Temperature or Humidity sensor failure or a sensor communication error Send for service if display persists ER2 Display Out of range condition for CO Temperature or Relative Humidity Detected reading exceeds CO Temperature or Humidity range specification This error is normal when clearing the maximum and minimum readings in the MAX MIN mode 9999 Display Reading exceeds the CO maximum measurement range or the battery power is weak 6 CO240 en GB_v1 6 3 15 EXTECH INSTRUMENTS
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