Extech Instruments C015 User manual

E. 
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
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

CO15-en-GB_v1.0 6/17
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Introduction
Thank you for selecting the Extech CO15 Carbon
Monoxide Meter. The CO15 is a digital, pen style meter,
that measures and displays carbon monoxide (CO)
concentrations between 0 and 999 parts per million
(ppm). The CO15 can be used for ambient air safety
checks of residential areas, appliances, HVAC service on
furnaces and hot water heaters, home inspections, and
industrial environments where the accumulation of CO
is possible.
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 and translations of this User Manual,
Product Updates, and Customer Support
Features
Adjustable carbon monoxide warning level
Dual Display
Long life electrochemical sensor
Audible alarm
Backlit LCD for easy viewing in dimly lit areas
Low battery indicator
Auto power off
Included wrist strap and carry pouch
Safety Information
IMPORTANT SAFETY NOTES
The CO15 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 CO15 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.

CO15-en-GB_v1.0 6/17
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 Electromagnetic (EMI) interference my cause erratic
meter readings; do not place meter near areas of high
EMI when taking CO measurements.
 Recovery time is required after the meter has been
exposed to high levels of CO (the longer the exposure,
the longer the recovery time).
Carbon monoxide is life threatening even at
relatively low concentrations; learn and
recognize the effects of CO poisoning (see Table
below). Do not use this meter as a personal
safety monitoring device.
Effects of Carbon Monoxide (CO) Poisoning
Warning: Ensure that the meter is powered on in room
temperature and in an area free of CO. If not, the meter
will read incorrectly when subsequently measuring CO.
0-1 PPM
Normal background levels
9 PPM
Maximum allowable short term
exposure
50 PPM
Maximum allowable continuous
exposure level in any 8-hour period,
according to OSHA
200 PPM
Mild headache, fatigue, nausea and
dizziness after 2-3 hours
400 PPM
Frontal headache with 1-2 hours, life
threatening after 3 hours
800 PPM
Dizziness, nausea, convulsions within
45 minutes. Unconsciousness within 2
hours. DEATH WITHIN 2 TO 3 HOURS
1600 PPM
Headache, dizziness, nausea within 20
minutes, DEATH WITHIN 1 HOUR
3200 PPM
Headache, dizziness, nausea within 5-
10 minutes. DEATH WITHIN 25-30
MINUTES
6400 PPM
Headache, dizziness, nausea within 1-
2 minutes. DEATH WITHIN 10-15
MINUTES
12800 PPM
DEATH WITHIN 1 TO 3 MINUTES

Meter Description
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2. LCD
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
LCD Display
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1
2
Button Descriptions
2
3
4
3
1
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 4
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

CO15-en-GB_v1.0 6/17
5
Operation
Power the meter
IMPORTANT: Power the meter in a room temperature
environment and in an area free of CO; otherwise the
meter will read incorrectly when subsequently measuring
CO.
Press the button to power on the meter. The LCD will
switch ON and display the programmed CO alarm limit in
the primary display and the ambient air temperature in
the secondary display (as shown in the LCD description
section above). Replace the batteries if the display does
not switch ON.
The meter performs a 15-second self-test during which
the displayed values will blink. When the self-test is
finished, the meter beeps and enters the normal
operating mode.
Measurements
The CO15 detects the existence of carbon monoxide (CO)
in the environment and displays the reading in parts per
million (PPM) in the primary display.
1. To take a measurement, trace the CO15 around the
area of the suspected leak.
2. The meter indicates the presence of carbon
monoxide (CO) in PPM in the primary display. The
secondary display indicates the maximum value
since powered on.
3. Long press the “backlight” button while in
measurement mode to reset the maximum value.
4. When high CO levels are detected an audible beeper
sounds at 25 ppm alerting the user to the dangerous
CO levels. The higher the concentration of CO, the
faster the beeper will sound.
5. To turn the meter off, press the button. The
meter powers off after 15 minutes of inactivity.
Change Temperature Units
The temperature shows on the display during the self-test
only. Power the meter in a room temperature
environment for the most accurate readings. Long press
the button during the self-test to change the
temperature units to oC or oF.

7
Specifications
Measurement range 0-999 ppm
Resolution 1 ppm
Accuracy 0 ~ 100 ppm: ± 20%
100 ~ 500 ppm: ± 15%
Accuracy stated for ambient
conditions: 20oC ±5oC (68oF ±9oF)
and 50% RH ±20%RH
Sensor Type Electrochemical
Power supply (3) 1.5V ‘AAA’ batteries
Battery life Approx. 250 hours (backlight
off); 35 hours (backlight on)
Dimensions / Weight: 175 x 47 x 28mm (6.9 x 1.8 x
1.1”) / 158.8g (5.6 oz.)
Troubleshooting
Error
Problem
Solution
Display
No display when pressing
power button
Ensure batteries are
properly installed with
correct polarity
Replace batteries
Display
Display switches off
Check for low battery
indicator; replace
batteries
Display
Calibration Failure
Check for low battery
indicator; replace
batteries
E2
Measurement is below
the range of the meter
Check readings in a
different area
E3
Measurement is above
the range of the meter
Check readings in a
different area
E4
Data error
Contact Extech for service
E31
A/D failure
Contact Extech for service
E33
Measurement circuit
failure
Contact Extech for service
E35
Self-test failure
Power meter in an area
free of carbon monoxide
Sensor Failure
Contact Extech for service
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com