SAE-1000 Series Carbon Dioxide detectors use the computing power in the sensor’s
on-board microprocessor to remember the lowest CO2 concentration measured in a
24 hour period. The sensor assumes this low point is at outside levels. The
smart sensor discounts periodic elevated readings that might occur if, for
example, a space was used 24 hours per day over a few days. Once the sensor has
collected 14 days worth of low concentration points it performs a statistical
analysis comparing sensor reading to background levels to see if there has been
any small changes that could be attributable to sensor drift. If the analysis
concludes there is drift, a small correction factor is made to the sensor
calibration to adjust for this change. If a space does not experience a periodic
drop to outside levels (e.g. where occupancy is 24 hours, 7 days/week), the
software should be deactivated. When the software has been deactivated (via menu
buttons) calibration may be required every 2 to 3 years.
◆ 5 Year Calibration Guarantee
◆ Optional LCD for displaying PPM level and menu options
◆ Monitors CO2 over range 0 to 2000 PPM (factory default)
◆ Field adjustable range from 0 to 1500 PPM up to 10,000 PPM without
re-calibration!
◆ NDIR single beam with a patented self- calibration algorithm
◆ Optional on board relay with field adjustable trip point
◆ Setup/calibration fully menu driven (SAE-1002 only)
◆ Powered by either AC or DC source with no change to circuit required
◆ Choice of two field adjustable analog output signals, linearized over full
range
