S&P AIRSENS CO2 Manual Del Usuario página 12

Other modes
Green: ≤ 800ppm / ≤ 60%HR
Orange: 800 – 1200ppm / 60 – 80%HR
EN
Red: > 1200ppm / > 80%HR
Special limits are provided in the LED diffuser for cases where AIRSENS CO2
or VOC is installed in an area with permanently high concentration. This special
mode is activated by SW4=ON.
New colour limits
Green: ≤ 950ppm
Orange: 950 - 1350ppm
Red: > 1350ppm
Modbus registers
Operating modes MF1, MF2 and MF3 allow only reading Modbus communication.
It means access to all Modbus registers (see Fig.3) to visualize parameters. If
MF4 mode is selected, total control with visualization and modification of param-
eters. Potentiometers P1 and P2 are disabled in MF4 mode.
In cases where a network communication net is made for multiple controls, it
will be necessary for all devices to remove jumper J9 (see Fig.1) except for the
last unit that will be kept (default from factory).
For visualization, modification and control via Modbus it will be necessary to have
software suitable for this kind of communication. S&P will not provide specific
software for this purpose. The information provided on the Modbus registers al-
lows establishing a correct communication between AIRSENS CO2 / VOC / RH
and configuration software chosen.
Basic connectivity features
Addressing: 1
Transmission speed: 19200
Parity: EVEN
Mode: RTU
Electrical interface: RS-485
Connector type: wiring D0 – D1 – Common
CALIBRATION / RESET
Automatic calibration
AIRSENS CO2 and VOC sensors incorporates a self-calibration algorithm that
allows adaptation to the environment. This adaptation could be prolonged for two
weeks until the reading is fine-tuned, and there may be periods of time with LED
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