TO CO
2
Gas Sensing Evaluation Kit (Analog) USEQGCK5000000
The above information is believed to be correct but does not purport to be all inclusive and must be used only as a guide.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort
Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
14
If the
CSV options
is selected from this view, there is an additional option of saving the
concentration values calculated. This must be opened and selected to save concentration
data.
Figure 17
– CSV Options from Concentration View
5.1 Signal Processing
RMS Rolling
– Sampling Frequency:
This calculates the RMS for a window of data every
time a new data point arrives. This is the fastest updating but most unstable processing
method.
Input Moving Average:
This is simply the number of rolling average windows being averaged
to provide the RMS data point that is passed to the concentration calculations.
Output Moving Average Size:
This changes the moving average window size on the
calculated concentration value.
6
PC TO PCB COMMUNICATIONS
•
Communications with the PCB are via a CP2102 USB to UART adapter, fitted to the
KEMET PCB.
•
UART settings: Baud 115200, 8 data bits, no parity, 1 stop bit, no handshaking.
•
All responses from the PCB are terminated with “\n”.
•
All commands sent to the PCB are single bytes.
•
It’s important to wait for the PCB response after sending each command as writing
another byte too soon may overwrite the previous command resulting in an error. If no
response is received within 1 second, then the command has not reached the PCB
and should be resent.
•
If the board requests a value, the value must be sent as a binary value (for example
Channel 4 must be sent as 0x04).
