Bacharach Comfort Chek 400, Руководство по эксплуатации, Страница: 11 / 20

Comfort Chek

400 Operation Manual
1509-9000 Rev 4 5
3. COMPONENTS
3.1. Power Supply
The instrument is powered by either 4 “AA” alkaline batteries or a supplied DC wall
adapter (9V/1A output). Install batteries into the battery compartment on the rear of
the instrument and make sure they are in correct polarity and making good contact.
When the wall adapter is used it will cut off the power supply from the batteries. The
wall adapter cannot be used as a battery charger.
When battery voltage gets low, “Lob” will appear on the LCD and the audible alarm
sounds. The CO
2
infrared sensor cannot operate under low voltage, so the instrument
beeps to indicate failed CO
2
measurement. The user can press any button to stop the
beeps and at that time the sensor readings will not be displayed. To continue, replace
the alkaline batteries with fresh ones or connect the wall adapter.
Figure 3-1. Sample Low Battery Screen
3.2. LCD Display
Figure 3-2. LCD Components
NOTE: If the AC adapter is plugged
in while the instrument is powered
on, the Comfort CHEK  400 will
lose power.
CO
2
concentration in PPM
Relative humidity in %
Air temperature, dew point,
or wet bulb temperature in
degrees C or F.