Preparation For Use; Operation - Extech Instruments EA80 User Manual

Preparation for Use

Power Supply
The meter is powered by six (6) 1.5V 'AAA' alkaline batteries or by an AC adapter.
Installing the Batteries
Insert six (6) AAA batteries as indicated by the diagram located on the inside of the battery
compartment.
When the battery voltage drops below the operating voltage, the "
displayed indicating that the batteries need to be changed.
AC Adapter
The AC adapter allows the meter to be powered from a common AC 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's gas inlet port and gas exhaust are not blocked.

Operation

Note: Exhaled CO
face.
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 at the top of the meter.
Selecting temperature units of measure (C/F)
Press the °C/°F button momentarily to toggle the temperature units.
CO2 Measurement
1. Press
2. The sensor requires a 30 second warm-up before
displaying the CO2 measurement.
3. The meter sensor requires approximately10 minutes
to stabilize in still air before the readings can be
considered accurate. Moving the meter may
decrease this stabilization time.
4. The primary display indicates the CO2 reading. The
secondary display indicates temperature. The third display indicates %RH.
will affect the accuracy of the reading; do not hold meter near the
2
button to turn on the meter,
3
+
" indicator will be
EA80-en-GB_v3.3 09/15