EA80 V2.1H 11/06
3
Preparation for Use
Power Supply
The meter is powered by six AAA-size alkaline batteries or an AC adapter.
Installing the Batteries
Insert six AAA-size batteries as indicated by the diagram located on the inside of the
battery compartment.
When the battery voltage drop below the operating voltage, the “
+
” indicator will
be displayed indicating that the batteries need to be changed.
AC Adapter
The AC adapter allows you to power the meter from a wall outlet.
When using the AC adapter, the batteries (if installed) will be bypassed. The AC adapter
is not a battery charger.
Gas Inlet
Always ensure that the meter gas inlet port and gas exhaust are not blocked.
Operation
Note: Do not hold the instrument close to your face. Exhaled CO
2
will affect
the accuracy of the reading.
Taking Measurements
The sensor for Temperature, Humidity, Dew Point and Wet Bulb measurements is located in the
remote probe. Hold the probe in the air in the area to be tested.
DO
NOT
immerse in liquid.
The sensor for CO2 measurements is located on the top of the meter itself.
Selecting temperature units of measure (C/F)
Press the °C/°F button momentarily to toggle the temperature units.
CO2 Measurement
1. Press button to turn on the meter,
2.
The sensor requires a 30 second warm-up before
displaying the CO2 measurement.
3.
The meter sensor needs about 10 minutes to
stabilize in still air, after that the readings can be
considered accurate. Moving the meter may
decrease this stabilization time.
4.
Primary display shows the CO2 reading. Secondary
display shows temperature reading. Third display shows %RH.
