CO2 auto-zero period

Set CO2 auto-zero period

Default auto-zero period, after the factory auto-zeroing, is 192 hours (8 days). During this period the lowest measured CO2 value is accepted as 400ppm and the auto-zero value is obtained automatically. If The period is 0, automatic auto-zero function is disabled, but the obtained or set with command auto-zero value is still used internally.

The command is described in Table 19.

Byte inde	Hex Velue	Meaning
0	2A	The command code.
1	48	Auto-zero period in hours. 0x48 = 72 hours.

Table 19

Example command: 0x2A48 – The server sets CO2 auto-zero period to 72 hours.

Get CO2 auto-zero period

Byte index	Sent request	Received response
0	2B – Command code.	2B – The command code.
1		48 – Auto-zero period in hours. 0x48 = 72 hours.

Table 20

Example command sent from server: 0x2B;

Example command response: 0x2B48 => CO2 auto-zero period is 72 hours.