Bacharach Comfort Chek 400 Operation Manual

Contents

Bacharach Comfort Chek 400 Operation Manual Manual pdf 11 page image

Comfort Chek 400 Operation Manual1509-9000 Rev 4 53. COMPONENTS3.1. Power SupplyThe instrument is powered by either 4 “AA” alkaline batteries or a supplied DC walladapter (9V/1A output). Install batteries into the battery compartment on the rear ofthe 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. Thewall adapter cannot be used as a battery charger.When battery voltage gets low, “Lob” will appear on the LCD and the audible alarmsounds. The CO2 infrared sensor cannot operate under low voltage, so the instrumentbeeps to indicate failed CO2 measurement. The user can press any button to stop thebeeps and at that time the sensor readings will not be displayed. To continue, replacethe alkaline batteries with fresh ones or connect the wall adapter.Figure 3-1. Sample Low Battery Screen3.2. LCD DisplayFigure 3-2. LCD ComponentsNOTE: If the AC adapter is pluggedin while the instrument is poweredon, the Comfort CHEK 400 willlose power.CO 2 concentration in PPMRelative humidity in %Air temperature, dew point,or wet bulb temperature indegrees C or F.