Most likely the problems is with COM port number on your new PC. The COM port is probably different than what you were using before.

You should first determine the COM port number for the new PC (unless you already know it in which case skip to step 2). This can be done by going to “My Computer”/Properties and selecting the Device Manager tab. There you will see a section called “Communication Ports (COM and LPT)”.

Once you have the COM port, connect the scale to the PC and configure the Procell’s Connection parameters by setting the COM port and the baud rate. The baud rate must be the same as set in the scale. After setting up all the parameters in the Connection tab, click on Open Port and you should have the connection established. To use Procell simply click you mouse cursor into a desired cell within you excel spreadsheet and press the data transfer (or the print key) on the scale. The data should appear directly in the cell where the cursor was pointing.