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 bit 0 of the CO2 configuration 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.
WARNING! All registers described below are active only if the room panel is equipped with a built-in CO2 sensor.
The 30303 register stores an actual value from the CO2 sensor (including CO2 Sensor Offset).
The register contains a value which allows for setting a correction of the CO2 sensor actual value indication. The offset value can be positive or negative. The actual CO2 offset value is added to the CO2 sensor indication. The default offset is 0.
The register contains a time constant for the CO2 sensor low pass filter. The value is expressed in seconds. The default filter value is 60 seconds. Setting the 0 value disables the filter.
The 32-bit register contains up to 4 characters (ASCII code), which can be displayed as a text (name) on the 14-segment display block together with the CO2_SENSOR_ACTUAL_VALUE register (displayed on the 8-segment display block). In case when a particular character value is 0 (NULL), the character is not displayed. Lower case characters are automatically changed into upper case characters. The default value is 838878031, which corresponds to the text “CO2”.
CO2_CONFIGURATION (40318, Bit 0)
The bit 0 of the register 40318 is responsible for activation or deactivation of the visibility of the CO2 sensor. If the bit 0 is active, the CO2 sensor’s actual value is visible in the main menu. The default value is true (visible).
WARNING! The CO2 value is visible with delay of 120 sec after the room panel restart or power supply connection.
The register contains a setpoint for the alarm value in ppm. If the actual CO2 sensor value increases over the setpoint value, then the room panel indicates the CO2 alarm (for other indication possibilities see the Device Configuration section). The default value is 1500 ppm.
The register contains a value in ppm which is the differential for the CO2 alarm value. The CO2 alarm is activated if the CO2 actual sensor value is higher or equal to the sum of the CO2_SETPOINT_FOR_ALARM register value and the CO2 differential for the alarm value. The CO2 alarm is inactive if the CO2 actual sensor value is lower or equal to the difference of the CO2_SETPOINT_FOR_ALARM register value and the CO2 differential for the alarm value. The default value is 100 ppm.
CO2 Alarm ON:
CO2 sensor actual value >= CO2 SetpointforAlarm + CO2 differential for alarm
CO2 Alarm OFF:
CO2 sensor actual value <= CO2 SetpointforAlarm - CO2 differential for alarm