Extech Instruments CO230 User Manual page 3

Descriptions
Meter Description
1. Temperature/RH sensor
2. Main Display
3. Alarm Relay Output
4. Aux. Displays
5. 12V AC Adaptor jack
6. Keypad
7. Alarm alert lamp
8. CO sensor
2
Note: Wall mount hole and relay
wiring screws are located on the back
Display Description
1. CO concentration (ppm)
2
2. Relative Humidity (%)
3. Air Temperature, Dew Point or
Wet Bulb Temperature (°C / °F)
Display Icons
TWA
STEL
HOLD
MIN/MAX
DP
AIR
WBT
%
°E (C/F)
Time weighted average (8 hours)
Short-term exposure limit (15-min. weighted average)
Holds reading on display
Minimum/Maximum readings
Dew point temperature
Air temperature
Wet bulb temperature
Relative Humidity measurement unit
Temperature units (Celsius/Fahrenheit)
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