Lutron Electronics CO2-9914SD Operation Manual page 26

The 16 digits data stream will be displayed in the
following format :
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each digit indicates the following status :
D15 Start Word
D14 4
D13
When send the %RH data ( probe 1 ) = 1
When send the Temp./%RH. data ( probe 1 ) = 2
When send the Dew point data ( probe 1 ) = 3
When send the Wet bulb data ( probe 1 ) = 4
When send the CO2 data ( probe 2 ) = 5
When send the Temp./CO2 data ( probe 2 ) = 6
D12, D11 Annunciator for Display
℃ = 01
℉ = 02
℃_Dew = G5
℉-Dew = G6
D10 Polarity
0 = Positive
D9 Decimal Point(DP), position from right to the
left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D8 to D1 Display reading, D1 = LSD, D8 = MSD
For example :
If the display reading is 1234, then D8 to
D1 is : 00001234
D0 End Word
RS232 FORMAT : 9600, N, 8, 1
Baud rate
Parity
Data bit no.
Stop bit
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PPM = 19
PPM_CO2 = G4
℃_WET = G7
℉-WET = G8
1 = Negative
9600
No parity
8 Data bits
1 Stop bit
24
% RH = 04