Meaning | Name | ID | Size in bytes | Type | Read/write | Persistent | Other |
---|---|---|---|---|---|---|---|
Factory information | |||||||
Device address | ADDR | 0 | 1 | Byte | R | Yes | Default is 09hex. |
Device serial number | SNUM | 1 | 12 | Str | R | Yes | Example: A1234567 |
Sensor number | SSNUM | 2 | 12 | Str | R | Yes | Example: B1234567 |
Component board number | CBNUM | 3 | 12 | Str | R | Yes | Example: C1234567 |
Software version number | VERS | 4 | 12 | Str | R | Yes | Example: 1.2.3.4567 |
Factory adjustment date Year | ADATEY | 5 | 2 | Uint | R | Yes | Example: 2014 |
Factory adjustment date Month | ADATEM | 6 | 1 | Byte | R | Yes | Example: 3 |
Factory adjustment date Day | ADATED | 7 | 1 | Byte | R | Yes | Example: 29 |
General parameters and variables | |||||||
Device status word | STATUS | 8 | 4 | Str | R | No | See Status word. |
CO2 measurement mode | CO2_MODE | 9 | 1 | Byte | R/W | Yes |
0 = Standby mode. Measurement and probe heating is off 1 = Measurement on Internal logic can override this setting. |
Final CO2 result | CO2 | 10 | 4 | Float | R | No | ppm CO2 |
Raw CO2 (uncompensated, unfiltered) | CO2_RAW | 11 | 4 | Float | R | No | ppm CO2 |
Compensated CO2 (unfiltered) | CO2_COMP | 12 | 4 | Float | R | No | ppm CO2 |
CO2 measurement filtering | CO2_FILT | 13 | 1 | Byte | R/W | Yes |
Range 0 … 1 0 = no filtering 1 = filtering (default) |
Sensor heating | HEAT | 14 | 1 | Byte | R/W | Yes |
Range 0…1 0 = no heating 1 = heating (default) |
Compensation settings | |||||||
Temperature compensation mode | TC_MODE | 15 | 1 | Byte | R/W | Yes |
0 = Compensation off 1 = Use temperature setpoint value (default) 2 = Use Internal sensor temperature |
Compensation temperature | T_COMP | 16 | 4 | Float | R/W | No | Celsius |
Measured temperature (internal sensor) | T | 17 | 4 | Float | R | No | Celsius |
Pressure compensation mode | PC_MODE | 18 | 1 | Byte | R/W | Yes |
0 = Compensation off 1 = Use pressure setpoint value 2 = Use internal pressure sensor (default) |
Compensation pressure | P_COMP | 19 | 4 | Float | R/W | No | hPa |
Measured pressure (internal sensor) | P | 20 | 4 | Float | R | No | hPa |
Humidity compensation mode | RHC_MODE | 21 | 1 | Byte | R/W | Yes |
0 = Compensation off 1 = Use RH setpoint value (default) |
Compensation humidity | RH_COMP | 22 | 4 | Float | R/W | No | %RH |
Oxygen compensation mode | O2C_MODE | 23 | 1 | Byte | R/W | Yes |
0 = Compensation off 1 = Use oxygen concentration setpoint value (default) |
Compensation oxygen | O2_COMP | 24 | 4 | Float | R/W | No | %O2 |
Adjustment settings | |||||||
Reference CO2 point 1 | CO2_RP1 | 25 | 4 | Float | R/W | Yes | ppm CO2 |
Measured CO2 point 1 | CO2_MP1 | 26 | 4 | Float | R | Yes | ppm CO2 |
Reference CO2 point 2 | CO2_RP2 | 27 | 4 | Float | R/W | Yes | ppm CO2 |
Measured CO2 point 2 | CO2_MP2 | 28 | 4 | Float | R | Yes | ppm CO2 |
Reference temperature point 1 | T_RP1 | 29 | 4 | Float | R/W | Yes | Celsius 0 °C |
Measured temperature point 1 | T_MP1 | 30 | 4 | Float | R | Yes | Celsius 0 °C |
Reference pressure point 1 | PRE_RP1 | 31 | 4 | Float | R/W | Yes | 1013.25 hPa |
Measured pressure point 1 | PRE_MP1 | 32 | 4 | Float | R | Yes | 1013.25 hPa |
Analog output settings | |||||||
Analog output mode | A_MODE | 33 | 1 | Byte | R/W | No |
0 = Off (0 mA) 1 = Test mode 2 = Normal (default) 3 = Locked to latest value |
Analog output test current | A_TC | 34 | 4 | Float | R/W | No | 0 … 25 mA |
Analog output error state current | A_EC | 35 | 4 | Float | R/W | Yes | 0 … 25 mA |
Analog output low end current | A_LC | 36 | 1 | Byte | R/W | Yes |
0 = 0 mA 1 = 4 mA |
Analog output scale low (0/4 mA) | A_LOW | 37 | 4 | Float | R/W | Yes | ppm CO2 |
Analog output scale high (20 mA) | A_HI | 38 | 4 | Float | R/W | Yes | ppm CO2 |
Other | |||||||
Persistent compensation values (used if volatile values are not given) | |||||||
Compensation temperature | T_COMP2 | 39 | 4 | Float | R/W | Yes | 37 °C (default) |
Compensation pressure | P_COMP2 | 40 | 4 | Float | R/W | Yes | 1013.25 hPa (default) |
Compensation humidity | RH_COMP2 | 41 | 4 | Float | R/W | Yes | 90 %RH (default) |
Compensation oxygen | O2_COMP2 | 42 | 4 | Float | R/W | Yes | 19.7 %O2 (default) |