WARNING! All registers described below are active only if the room panel is equipped with a built-in CO2 sensor.
The default CO2 unit is ppm, and it is displayed together with the CO2 sensor value (if active) permanently (not editable). The CO2 actual sensor value is displayed in delay of 120 sec after the room panel restart or power supply connection (if the CO2_SENSOR property 4200 is true). The CO2 sensor needs up to 2 minutes to warm up from the moment of power supply connection. The CO2 sensor achieves maximum accuracy after 10 minutes of operation. It is worth mentioning that the built-in CO2 sensor does not need a manual calibration. Calibration algorithm begins after 24 hours of continuous operation, adjusting the sensor measurement.
CO2_SENSOR (AI 6)
The CO2_SENSOR is an Analog Input object number 6, which stores current values from the CO2 sensor indication (including the CO2_SENSOR_OFFSET value). The value of the object is calculated according to the following equation:
CO2_SENSOR = (CO2_SENSOR_INDICATION + CO2_SENSOR_OFFSET_VALUE)
CO2_SENSOR_OFFSET(AI 6, Property 4205)
The CO2_SENSOR_OFFSET is a property number 4205 of the CO2_SENSOR object, which value contains a correction for the CO2 sensor current value indication. The value of this object can be positive or negative. The value of the CO2_SENSOR_OFFSET is added to the CO2 sensor indication. The default value of this object is 0.
CO2_FILTER (AI 6, Property 4003)
The CO2_FILTER is a property number 4003 of the CO2_SENSOR object, which value contains the time constant for the CO2 sensor low pass filter. The value is expressed in seconds. The default value of this object is 60 seconds. Setting the 0 value disables the filter.
CO2_NAME (AI 6, Description Property)
The CO2_NAME is a description property of the CO2_SENSOR object, which value contains a static string description displayed on the LCD (max. 4 string characters).
CO2_SENSOR_VISIBILITY (AI 6, Property 4200)
The CO2_SENSOR_VISIBILITY is a property number 4200 of the CO2_SENSOR object, which status activates or deactivates the CO2 sensor visibility. If the status is active, the CO2 sensor current value is visible in the main menu. The default status of this object is true.
CO2_SETPOINT_FOR_ALARM (AO 19)
The CO2_SETPOINT_FOR_ALARM is an Analog Output object number 19, which value contains the setpoint for the alarm value in ppm. If the current CO2 sensor value increases above the CO2_SETPOINT_FOR_ALARM value, the room panel indicates a CO2 Alarm (for different indication possibilities, see Device Configuration).The default value of this object is 1500 ppm.
CO2_DIFFERENTIAL_FOR_ALARM (AO 20)
The CO2_DIFFERENTIAL_FOR_ALARM is an Analog Output object number 20, containing the value in ppm, which is a differential for the CO2 Alarm value. The CO2 Alarm is activated when the CO2 current sensor value is higher than or equal to the sum of the CO2_SETPOINT_FOR_ALARM (AO 19) object value and the CO2_DIFFERENTIAL_FOR_ALARM value. The CO2 Alarm is inactive when the CO2 current sensor value is lower than or equal to the difference of the CO2_SETPOINT_FOR_ALARM object value and the CO2_DIFFERENTIAL_FOR_ALARM value. The default value of this object is 100 ppm.
CO2 Alarm ON:
CO2_SENSOR >= CO2_SETPOINT_FOR_ALARM + CO2_DIFFERENTIAL_FOR_ALARM
CO2 Alarm OFF :
CO2_SENSOR <= CO2_SETPOINT_FOR_ALARM - CO2_DIFFERENTIAL_FOR_ALARM