Some important Model 486 487 features include: DualDisplays-Alocharacteralphanumericdisplay used for current readings and front panel messages, and a smaller 8 character alphanumeric display for front panel messages and the Voltage Source setting of the Model 487 zero correct - used to cancel internal offsets. Relative @EL) -Used to establish baselines. DataStore-CCanstoreupto512readingsandisaccessible over the bus 01 from the front panel. User Programmed Default Conditions - Establish present operating setup conditions as power-up default conditions. Talk-Only - From the front panel, set instrument to send readings over the bus to a listen-only device, such as a printer. V/I ohms resistance measurements up to 5OPQ (Model 487 only). Preset (Model 487) toggles between preset V-source values