The Universal Lab Interface (ULI) is a device used in laboratories to collect data electronically. Normally, this device is controlled by a microcomputer. This thesis shows how the HP 48 series calculator, manufactured by Hewlett-Packard, can replace the microcomputer as a controlling device for the ULI. The HP 48 series calculator has serial interface capabilities and has serial data transmission rates that can be matched by the ULI. Programs were written using a form of BASIC called User-RPL for the calculator, that accesses the calculator's input buffer.
The low cost of the calculator and programmability of the input buffer are just two features of the calculator that make this project feasible and cost effective for many applications. Two applications are shown that feature the versatility of the system incorporating the ULI with the Hewlett-Packard calculator. Different methods of data acquisition from the calculator's input buffer are discussed and compared.
The programs used to send, receive and process command codes and data between the ULI and HP 48 calculator are included in this thesis. Also, a comparison between this system and a commercial product currently available is given.