The notation <cr> refers to the carriage return control character, which you can send in a terminal application by pressing enter on your keyboard. Before entering commands, send a <cr> to clear the command buffer.
You can enter the commands in uppercase or lowercase. In the command examples, the keyboard input by the user is in bold type.
Basic serial commands lists the basic serial commands that are available by default. To access advanced serial commands (listed in Advanced serial commands), enter the command pass 1300.
| Command | Description |
|---|---|
| Device information and status | |
| ? | Show probe information. |
| ?? | Show probe information (will respond in POLL mode). |
| errs | Show currently active errors. |
| help | Show list of currently available serial commands. |
| snum | Show probe serial number. |
| system | Show probe firmware information. |
| time | Show probe operation hours and uptime. |
| vers | Show probe firmware version. |
| Serial line output and communication | |
| close | Close connection to probe (POLL mode) |
| form [modifier string] | Show or set output format. |
| intv [0 ... 255 s/min/h] | Set continuous output interval for R command. |
| open [address] | Open connection to probe in POLL mode. |
| r | Start the continuous outputting. |
| s | Stop the continuous outputting. |
| sdelay [1 ... 255] | Show or set serial line transmission delay (1–255, 1 unit = 4 milliseconds) |
| send | Output a single measurement message. |
| seri [baud data stop parity] | Show or set the serial interface settings. |
| smode [mode] | Show or set startup serial mode: RUN, STOP, or POLL. |
| Environmental compensation | |
| env | Show or set environmental parameters. |
| Adjustment information | |
| adate | Show CO2 factory adjustment date. |
| atext | Show CO2 factory adjustment information. |
| Other commands | |
| reset | Reset the probe. |
| pass [1300] | Access advanced serial commands. |
| Command | Description |
|---|---|
| Serial line output and communication | |
| addr [0 … 254] | Show or set probe address. |
| Analog output | |
| amode | Show or set analog output mode (analog output limits and error level). |
| aover | Show or set analog output overrange and clipping behavior. |
| asel | Show or set analog output parameter and scaling. |
| Calibration and adjustment | |
| cco2 | Adjust CO2 measurement gain and offset. |
| cdate | Show or set calibration date. |
| ct | Adjust temperature measurement offset. |
| ctext | Show or set calibration information. |
| Environmental compensation | |
| o2cmode | Show or set oxygen compensation mode. |
| pcmode | Show or set pressure compensation mode. |
| rhcmode | Show or set humidity compensation mode. |
| tcmode | Show or set temperature compensation mode. |
| Other commands | |
| frestore | Restore probe to factory settings. |