the manual how to use the particle counter is where the rest of the manuals are. If you want to use it read the manual BEFORE you touch it and reconfigure everything so that nothing is working anymore. If you still don't know how to use it or can't find the manual you can ask me or simply google for it. If you only want to read the latest values you don't have to program or even touch the thing at all. Simply connect it to a computer via serial port. Right now it is taking data every 10min or so for a short period of time. Up to 8000 measurements are stored in the device, starting to overwrite the oldest ones when reaching the limit.
The software is installed on the small laptop, the same we use for the WinCam. There is an icon on the desktop, i think the software is called "comet" or so. You have to connect the cable with the USB-to-serial adapter. The cable has a label "particle counter". Plug everything together, run the software, and from the menu simply choose something like read everything, meaning data and settings. That's it.
Data is saved in comma-separated textfile, using current date and time. Sometimes it happens that it can't plot the data later on because the data is corrupt. I don't know why this happens but it simply forgets some characters while reading from the serial port or saves it twice. As it is a simple textfile this is easy to fix.