COMxL RS232C - Version 2.00 An easy-to-use and very-helpful Add-On/Add-In for the MS Excel 97/2000 user. It lets you link your instrument to any Excel worksheet directly via RS232C port. The readings from instrument can go/fill-in anywhere you want to them to go by just simply hightlighting the range. Now you can use RS232 port in MS Excel to import DATA from instrument and other computer with ease.