CO250 Datasheet, PDF (3/10 Pages) Extech Instruments Corporation. – CO2 Meter

Meter Description
METER
1
1. Temperature and Humidity sensor
2. CO2 sensor (rear)
2
3. LCD display
3
4. AC Adaptor connector
4
5. RS232 port
5
6. Keypad
6
7. Battery compartment (rear)
7
LCD DISPLAY
1. CO2 concentration in ppm
2. Relative Humidity in %
3. Air Temperature, Dew Point or
Wet Bulb Temperature
HOLD TWA STELCO2
1
ftm
m/s
O
%₂
SYMBOLS
TWA
Time weighted average( 8 hours)
3
STEL
Short-term exposure limit (15 minutes weighted average)
HOLD
Freezes current reading on display
MIN/MAX Minimum/Maximun readings
Low battery indicator
DP
Dew point temperature
AIR
Air temperature
WBT
Wet bulb temperature
%
Unit of relative humidity
C or F
Celsius/Fahrenheit
KEYPAD
Turns the meter on and off.
SET _{Enters setup mode.}
Sets as non-sleep mode with
.
Exits setup page/mode.
CAL
Esc
Enters CO2 calibration with
.
Enters RH calibration with DP/WBT
Freezes the current reading on display.
Cancels data hold function.
Activates or cancels the backlight.
Selects unit or increases value in setup.
Selects AIR, DP, WBT temps display.
DP/WBT _{Selects unit or decreases value in setup.}
M
N
X
/
AV
Activates MIN,MAX,STEL,TWA function.
Saves and finishes settings.
3
CO250 V1.2 1/09