Can I upgrade the 4200-SCS hardware myself (install a ZIP disk drive, extra memory (RAM))?The 4200-SCS is not a personal computer (PC), but a precision measurement instrument. There is a high probability that unapproved hardware upgrades will cause certain parts of the system malfunction, and such repairs will not be covered by the warranty. The 4200-SCS has been engineered to deliver a high level of stability and reliability for its intended use as a semiconductor characterization system. As such, it provides industry-leading measurement, data storage, processing, and communications options. If you have needs that you believe may be resolved by a hardware upgrade, please contact Keithley applications or sales engineer for a solution.