UEi Test Instruments AQM4 - Manual (Page 4)

3
The meter is powered by either 4 AA
batteries or a DC adaptor (9V/1A output.)
Install the batteries into the battery
compartment on the rear of the instrument.
Verify correct polarity and solid contact.
When an adaptor is used, it will cut off
the power supply from the batteries. The
adaptor can not be used as a battery
charger.
When battery voltage gets low, will
appear on the LCD (Fig. 1.) The CO² sensor
accuracy is compromised under low
batteries, replace with fresh batteries or
connect to an adaptor.
POWER SUPPLY
LCD DISPLAY
PRIMARY LCD
SECONDARY
LCD