Reliable Controls SMART-Space Controller User Manual

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 2012-2015 Reliable Controls Corporation
BACNET NETWORK APPLICATIONS
USER GUIDE
INPUT/OUTPUT CONFIGURATION
SMART-SPACE CONTROLLER
™
FIGURE 26: AUTOMATIC CALIBRATION ONCE EVERY TWO WEEKS
If the lowest CO2 value recorded is 600 PPM, as shown in Figure 26, the sensor will be
automatically calibrated down by 100 ppm ( (600 - 400)/2 ). In other words, the calibration
will offset all readings by minus 100 ppm.
In the above example, the lowest CO2 value recorded by the sensor during the two-week
period was 600 ppm, resulting the sensor being automatically calibrated downwards by
100 ppm. If the lowest value recorded actually was 600 PPM, the sensor would be out of
calibration by 100 ppm following execution of the automatic calibration algorithm. For
applications such as continuously occupied rooms, or in densely populated cities, this
sensor is not recommended.
MANUAL
Manual calibration is only required for immediate calibration of the sensor for
commissioning purposes. The effect of the manual calibration will disappear after the next
automatic calibration.
Manual calibration is accomplished by writing to BACnet property 1139 of the CO2 Analog
Input object. This is most easily accomplished by utilizing the Read/Write BACnet
Properties dialog box in RC-Studio.
The CO2 sensor must be exposed to fresh air at least once every two weeks for the
automatic calibration algorithm to provide an accurate calibration. It doesn't matter when
the fresh air will be sensed, just that it will be sensed at some point during the period.
CO
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Reliable Controls SMART-Space Controller Specifications

General

Brand	Reliable Controls
Model	SMART-Space Controller
Category	Controller
Language	English