Extech CO250 Manual de Usario

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User's Guide
CO2 Meter
Model CO250
CO250-EU-EN v1.5 12/13 2
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Introduction
Congratulations on your purchase of this Model CO250 Meter. This meter measures CO2 (Carbon
Dioxide) levels, air temp., dew point, wet bulb temperature and humidity and is an ideal instrument
for indoor air quality (IAQ) diagnosis. This meter is shipped fully tested and calibrated and, with
proper use, will provide years of reliable service.
Meter Description
METER
1. Temperature and Humidity sensor
2. CO2 sensor (rear)
3. LCD display
4. AC Adaptor connector
5. RS232 port
6. Keypad
7. Battery compartment (rear)
LCD DISPLAY
1. CO2 concentration in ppm
2. Relative Humidity in %
3. Air Temperature, Dew Point or
Wet Bulb Temperature
SYMBOLS
TWA Time weighted average (8 hours)
STEL Short-term exposure limit (15 minutes weighted average)
HOLD Freezes current reading on display
MIN/MAX Minimum/Maximum 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.
Enters setup mode.
Sets as non-sleep mode with .
Exits setup page/mode.
Enters CO2 calibration with .
Enters RH calibration with
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.
Selects unit or decreases value in setup.
Activates MIN,MAX,STEL,TWA function.
Saves and finishes settings.
%
O
TWA
STEL
HOLD
ftm
m/s
CO
2
1
2
3
CA L
Esc
SET
DP / WBT
N
X
M /AV
DP / WBT
CO250-EU-EN v1.5 12/13 3
Operation
BATTERY INSTALLATION
The meter is powered by 4 AA batteries or a DC adaptor. Install the batteries into the rear battery
compartment observing correct polarity. When an adaptor is used, the batteries will be disconnected
from the meter. The adaptor cannot be used as a battery charger. When the battery voltage drops
below the required level, and “Lob” will appear on the display, a beeper sounds and readings
are no longer displayed. (Press any key but the
SET
to stop the beeps). Replace the batteries to
resume normal operation.
You, as the end user, are legally bound (EU Battery ordinance) to return all used
batteries, disposal in the household garbage is prohibited! You can hand over your
used batteries / accumulators at collection points in your community or wherever batteries
/ accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle
POWER ON/OFF
Press
SET
to turn the meter on and off. At power up, the meter emits a short beep and performs a
30 second countdown for meter warm up. It then enters the normal operation mode with current
CO2, temperature and humidity readings displayed.
TAKING MEASUREMENT
The meter starts measurements when powered on and updates readings every second. If the
operating environment changes (ex. from high to low temp.), it takes 30 seconds for CO2 sensor to
respond and 30 minutes for RH.
NOTE: Do not hold the meter close to your mouth or any other source of CO2.
AIR, DP and WBT Measurements
Press the DP/WBT button to switch temperatures display. The lower left display will cycle from “AIR”
air temperature, “DP” dew point temperature and “WBT” wet bulb temperature.
DATA HOLD
Press the HOLD button to freeze the readings, the "HOLD” icon is displayed on the left top of the
display. All current readings are held unchanged, except STEL and TWA. Press “HOLD” again to
cancel the hold function.
BACKLIGHT
Press the MODE/ button for more than 1 second to activate or to cancel backlight function.
%
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O
O
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OO
CO2
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O
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OO
CO
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Especificaciones del producto

Marca: Extech
Categoría: Equipo de medición
Modelo: CO250

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