Extech Instruments CO200 User manual

USER MANUAL
CO2Monitor
Model CO200

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Introduction
Congratulations on your purchase of the Model CO200 Carbon Dioxide Meter. The CO200
measures and displays CO2level, air temperature, and relative humidity. Visible and audible
alarm (with alarm relay output), and real-time calendar clock, make this an ideal instrument for
indoor air quality (IAQ) monitoring. The CO200 is shipped fully tested and calibrated and, with
proper use, will provide years of reliable service.
Description
METER
1. LCD Multifunction display
2. Power LED indicator
3. Control buttons
Power adaptor jack, alarm relay jack, and sensors on rear
LCD DISPLAY
1. CO2concentration in ppm
2. Calendar clock
3. Air Temperature
4. % Relative Humidity
FUNCTION INDICATORS
ppm CO2measurement value
GOOD CO2(good air quality level)
NORMAL CO2(normal air quality level)
POOR CO2(poor air quality level)
Air Temp Air Temperature
Humidity % Relative Humidity
°C or °F Celsius or Fahrenheit units
MIN/MAX Minimum or Maximum readings
Flashes when CO2alarm is triggered (relay activates)
CONTROL BUTTONS
SET Long press to enter setup mode. Saves settings.
ESC Exits setup page/mode. Terminates CO 2 calibration.
RESET Long press to clear the MIN/MAX memories.
▲Select a mode or increase a value in the setup menu.
MIN/MAX ▼Access MIN/MAX function or use as down-arrow in setup mode.
Long press SET, MIN/MAX, and ▲ to enter the CO 2 calibration mode .

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Operation
Powering the CO200
Plug the supplied power adaptor (5V/0.5A) into the power jack on the back of the meter
(ensure that you connect to the power jack on the left, not the alarm relay jack on the right;
see diagram in the Alarm Relay section below).
Now connect the power adaptor to an AC power source, the meter will switch ON, the front
panel LED power indicator will light, and the beeper will sound. If the power source voltage
is incorrect, “bAt“ will display and the LED indicator will flash. Do not use the CO200 with an
incorrect power source.
In normal operation the LCD will display CO 2 , temperature, humidity, date, and time. The air
quality level is also displayed (GOOD, NORMAL, POOR).
Measurements
The meter starts measuring as soon as it is powered and updates readings once per second. If the
operating environment changes (from high to low temperature, for example), it will require 2 minutes
for the CO2 sensor to respond and 10 minutes for the Relative Humidity sensor to respond.
Note: Do not hold the meter close to your mouth or any other source of CO2.
MIN/MAX Mode
In the normal mode, press the MIN/MAX button to see the minimum or the maximum CO2,
Temperature, and Humidity values. Each press of the MIN/MAX button steps through the MIN, the
MAX, and then the normal display mode.
Long press the RESET button to clear the minimum and maximum values from memory.
Alarm Function
The CO200 features an audible (beeper) and visual (flashing fan icon) alarm that warn when the
CO2concentration exceeds the programmed threshold. There are two alarm thresholds, the ‘POOR’
air quality threshold (that triggers the alarm), and the ‘NORMAL’air quality threshold (that cancels
the alarm). See the Setup mode to set these threshold settings.
The alarm output relay switches on and off as the CO2alarm switches on and off (see next section).
The audible alarm can be manually silenced by pressing any key, or it will automatically stop when
the CO2reading is no longer in the alarm region (the user can subsequently press and hold the
RESET button to re-activate the alarm, if desired).
If the beeper is manually silenced, it will sound again when readings
move out of, and then back into, the alarm region.
The fan icon continues to flash even when the beeper is manually
silenced. It disappears only when readings are no longer in the alarm
region.

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Alarm Relay Output
The CO200 includes an alarm relay output that can be connected to an external device such as an
alarm light, warning sign, alarm buzzer, or controlling device (ON/OFF switch to a fan, for example).
The relay switches ON and OFF as the CO200’s CO2alarm switches ON and OFF (see previous
section for more on the alarm feature). The fan display icon flashes each time the relay closes.
The rear relay output jack requires a 2.5mm stereo phone plug. The relay is rated for 1A at 30VDC
or 0.5A or 125VAC.
1. AC adaptor input (5VDC)
2. Alarm relay output
3. Phone plug wiring
Setup Mode
Long press the SET button to enter the setup mode.
P1.1: Threshold setting for the ‘GOOD’air quality display icon
When entering the setup mode, P1.0and ‘CO2’are displayed. Press the SET button again to
access P1.1for setting the CO2upper limit (threshold) for the ‘GOOD’air quality display icon. The
current set value will appear blinking on the display.
Press the ▲or ▼button to increase or decrease the value. Each press adjusts in 100 ppm
increments. The range is 0 to 700 ppm (default is 700 ppm).
When the value has been set, press the SET button to confirm the ‘GOOD’threshold and move to
P1.2for setting the ‘NORMAL’display threshold. Press the ESC button to exit without saving.
P1.2: Threshold setting for the ‘NORMAL’air quality icon and the CO2Alarm
P1.2is used for setting the CO2high threshold for the ‘NORMAL’air quality display icon. It is also
the low threshold for the alarm beeper, the flashing fan alarm icon, and the output relay. The current
set value will appear blinking on the display.
Press the ▲or ▼button to increase or decrease the value. Each press adjusts in 100 ppm
increments. The range is 700 to 1000 ppm (default is 1000 ppm).
When the value has been set, press the SET button to confirm the ‘NORMAL’limit and move to
P1.3for setting the ‘POOR’display threshold. Press the ESC button to exit without saving.

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P1.3: Threshold setting for the ‘POOR’air quality icon and CO2Alarm
P1.3is used for setting the high CO2threshold for the ‘POOR’air quality display icon, alarm beeper,
flashing fan icon, and output relay. The current set value will appear blinking on the display.
Press the ▲or ▼button to increase or decrease the threshold. Each press adjusts in 100 ppm
increments. The range is 1000 to 5000 ppm (default is 1000 ppm).
When the value has been set, press the SET button to confirm and return to the P1.0 screen. Press
ESC to exit without saving.
Caution: Set the alarm value within the specified range of the CO200 where accuracy is assured.
Out of specification readings are for reference only.
P2.0 Temperature Units
Press the ▲button in P1.0mode to access P2.0for setting the temperature display units.
Press the SET button to access the P2.1 setting mode. The °C or °F will blink (default is °C).
Press the ▲button to change the units. Press the SETbutton to confirm the setting or press the
ESC button to exit without saving and return to P1.0.
P3.0 Real-Time Clock
Press the ▲ button in P1.0twice to access P3.0for setting the real-time calendar clock. Press the
SET button and the meter will access P3.1, showing the blinking YEAR on the lower left. To change
the year, press the ▲ or ▼ button. Press the SET button to save the setting and to enter P3.2(or
press the ESC button to return to P3.0without saving the setting).
Press the ▲button from P3.1to access P3.2. The current MONTH setting will blink. To change the
month, press the ▲ or ▼ button. Press the SET button to save the setting and to enter P3.3(or
press the ESC button to return to P3.0without saving the setting).
Repeat as above to finish setting the P3.3(DATE), P3.4(HOUR) and P3.5(MINUTE)

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P4.0: Factory Default Reset
Press the ▲button in P1.0 three times to access P4.0 where you can reset the meter to its default
settings. Press SET and the meter will access P4.1 with a blinking “No”. Press the ▲to switch the
status to ‘Yes’and then press either the SET button to confirm and continue or the ESC button to
abort the process.
Calibration
The meter is calibrated to a 400ppm CO2concentration at the factory. If the accuracy becomes a
concern, or after one year of use, return the meter to Extech for calibration or continue below.
ABC (Automatic Baseline CO2Calibration)
ABC (Automatic Baseline Calibration) establishes a baseline calibration to eliminate the zero drift of
the infrared sensor. The ABC function is always “ON” when the meter is powered.
ABC is designed to calibrate the meter at the minimum CO2reading detected over 7.5 days of
continuous monitoring (power on). It assumes that the area being tested receives fresh air with a
CO2level of approximately 400ppm at some point during the monitoring period. Note that It is not
suitable to use the CO200 in closed areas with consistently high CO2levels 24 hours a day.
Manual CO2Calibration
Manual calibration is suggested to be done outdoors on a clear day with good ventilation and fresh
air where the CO2level is approximately 400 ppm. Do not calibrate on a rainy day because high
humidity will affect the CO2level in air.
CAUTION: Do not calibrate the meter in an atmosphere of unknown CO2concentration. Do not
calibrate in places crowded with people, pets, plants, or where high CO2concentrations may exist
such as near ventilation ducts or fireplaces.
Place the meter in the calibration area and switch it on. Press and hold the
SET, ▲, and ▼buttons simultaneously for > 1 second to enter CO2
calibration mode. “400ppm”and “CO2” will blink while the calibration is in
process.
The calibration will require approximately five (5) minutes. When the
calibration is complete, the blinking stops and the meter returns to the normal operating mode.
Press ESC to abort a calibration session (not recommended).

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Specifications
Function
Range
Resolution
Accuracy
CO2
0 to 9999ppm
1ppm
± (5%rdg + 50ppm)
Temperature
-10 to 60°C (14 to 140°F)
0.1°
± 0.6°C (0.9°F)
Humidity
0.1 to 99.9%
0.1%
± 3% (10 to 90%)
± 5% (< 10% or > 90%)
Display
Multi-function LCD
Sensor Type
CO2: NDIR (non-dispersive infrared) technology
Humidity: Capacitance sensor
Temperature (air): Thermistor
Response
CO2: < 2min for 90% step change
Air temperature: < 2min for 90% step change
RH: < 10min for 90% step change
Alarm relay output
Rated: 1A 30VDC or 0.5A 125VAC
Relay opens/closes as the CO2alarm switches ON/OFF
Operating Conditions
14 to 140°F (-10 to 60°C); < 90% RH non-condensing
Storage Conditions
-4 to 140°F (-20 to 60°C); <99% RH non-condensing
Power Supply
5VDC (±10%), ≥ 500mA (supplied adaptor)
Dimensions
4.6 x 4 x 4” (117 x 102 x 102 mm)
Weight
7.2 oz (204 g)
Maintenance
Cleaning and storage
1. The meter should be cleaned with a damp cloth and mild detergent when necessary. Do not use
solvents or abrasives.
2. Store the meter in an area with moderate temperature and humidity.

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Troubleshooting
No power
Check that the AC adaptor is properly connected.
Slow response
Check that rear air flow vents are not blocked.
"BAt” and green LED flash
The adaptor output voltage is too high or too low.
Error Display Codes
CO2
Display
Code
E01
CO2sensor malfunction.
Return for repair.
E02
CO2reading out of range (low).
Re-calibrate the meter. If problems persist,
return for repair.
E03
CO2reading out of range (high).
Place the meter in fresh air and allow 5 minutes.
If problem persists, re-calibrate the meter.
Return for service if necessary.
E17
CO2senor failure.
Return for repair.
Temperature
Display
Code
E02
Air temperature out of
range (low).
Place the meter at room temperature for 30
minutes. If problem persists, return for repair.
E03
Air temperature out of
range (high).
Same as EO2.
E31
Sensor malfunction.
Return for repair.
Humidity
Display
Code
E04
Temperature display shows error.
Refer to temperature error codes.
E11
RH calibration failure.
Please return for repair.
E34
RH sensor circuit failure.
Please return for repair.

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CO2Level Guidelines
Important: The public information provided below is offered for reference only. FLIR Systems, Inc. is not liable for
injury to persons or property through the use or misuse of this device. It is the responsibility of the user to ensure
proper air quality in the residential or commercial spaces where this device is to be used.
Non-enforced reference levels:
•250 - 350 ppm: Normal background outdoor levels.
•350- 1,000 ppm: Typical level found in occupied spaces with good air exchange.
•1,000 –2,000 ppm: Level associated with complaints of drowsiness and poor air.
•2,000 –5,000 ppm: Level associated with headaches, sleepiness, and stagnant, stale, or stuffy air. Poor
concentration, loss of attention, increased heart rate and slight nausea may also be present.
•>5,000 ppm: Exposure may lead to serious oxygen deprivation resulting in permanent brain damage, coma,
and death.
Regulatory exposure limits:
•ASHRAE Standard 62-1989 (1000ppm): CO2concentration in occupied building should not exceed
1000ppm.
•OSHA (5000ppm): Time weighted average over five 8-hour workdays should not exceed 5000ppm.
•Building bulletin 101 (Bb101) 1500ppm: UK standards for schools indicate that CO2, averaged over an
entire day (i.e. 9am to 3:30 pm), should not exceed 1500ppm.
•Germany, Japan, Australia, UK (5000ppm): 8-hour weighted average occupational exposure limit is
5000ppm.
Two-year Warranty
FLIR Systems, Inc. warrants this Extech brand instrument to be free of defects in parts and workmanship for two
years from date of shipment (a six-month limited warranty applies to sensors and cables). To view the full warranty
text please visit: http://www.extech.com/support/warranties.
Calibration and Repair Services
FLIR Systems, Inc. offers calibration and repair services for the Extech brand products we sell. We offer NIST
traceable calibration for most of our products. Contact us for information on calibration and repair availability, refer to
the contact information below. Annual calibrations should be performed to verify meter performance and accuracy.
Product specifications are subject to change without notice. Please visit our website for the most up-to-date product
information: www.extech.com.
Contact Customer Support
Customer Support Telephone List: https://support.flir.com/contact
Calibration, Repair, and Returns: [e-mail]
Technical Support: https://support.flir.com
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All rights reserved including the right of reproduction in whole or in part in any form
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