
Comfort Chek
400 Operation Manual
2 1509-9000 Rev 4
1.2. Comfort Chek
400 Shipping Checklist
This checklist ensures that you have received everything required to run your
Comfort Chek 400. If you do not receive any of the items listed below, contact the
factory immediately.
• Comfort Chek
400 instrument
• 4 x “AA” alkaline batteries
• AC wall adapter (with North American plug)
• Operation manual
• Black plastic carrying/storage case
1.3. Key Features
Features of the Comfort Chek
400 include the following.
• Displays CO
2
, temperature and RH simultaneously
• Stable NDIR sensor for CO
2
detection
• Statistics for STEL and TWA
• Backlit LCD display for dark areas
• Audible alarm for CO
2
readings
• Battery (operates up to 10 hours) or continuously with wall adapter power supply
• Easy user calibration for CO
2
1.4. General CO
2
Guidelines
General CO
2
indoor air quality guidelines are summarized in the chart below. Aside
from the OSHA level of 5000 ppm for unsafe CO
2
levels, the other guidelines of
normal (300-400 ppm) and poorly ventilated (1000-1100 ppm) are generally accepted
standards for indoor air quality. Your guidelines may vary based on local practices
and personal preferences. Refer to Section 7 for additional information.
Figure 1-3. General CO
2
Guidelines
Komentáře k této Příručce