Operation; Powering The Instrument; Change The Temperature Units - Extech Instruments CO220 User Manual

Operation
POWERING THE INSTRUMENT
Power the unit by plugging the AC adaptor into the meter and
into an AC source. The meter will switch ON with a short beep.
Please use an appropriate power source: 100 to 240VAC (50‐60Hz).
The AC adaptor's output voltage is 7.5 to 9.0V and its output
current is 0.5A. Use of 3
The LCD will display the current CO
relative humidity, date, and time (date and time toggle every 10
seconds). Six facial icons indicate the indoor air quality level and
appear on the top‐tier display area (see figure at right and the
section titled Display Symbols earlier in this guide for additional
details).
CO MEASUREMENT CONSIDERATIONS
2
The meter starts measuring when powered ON and updates readings every 6 seconds.
Response time is 10 seconds for CO
If the environmental conditions change (for example, a low to high temperature swing) please
allow 30 seconds for CO
NOTE: Do not hold the meter close to the mouth or any other source of CO
CHANGE THE TEMPERATURE UNITS (
The change the displayed temperature units of measure:
1. Press and hold the SET button
2. While holding the SET button, press the
3. Repeat these steps to change the units again
rd
party AC adaptor can damage the meter.
concentration, air temperature,
2
and 2 seconds for Relative Humidity.
2
readings and 30 minutes for Relative Humidity readings to stabilize.
2
o o
C/ F)
o o
C/ F button
4
.
2
CO220-EU-EN V1.3 07/13