The Portable Enraf Terminal (PET) is a compact, robust device that allows users to configure, test, and service Enraf's line of field instruments without opening them. The PET has a keyboard, LCD display, and connects to the field instruments via an infrared or RS-232 port to access instrument settings. It is intrinsically safe, allowing use in hazardous environments. The PET simplifies field work by having short, easy to remember commands and allows configuration from the control room using Enraf software.