San telequip manufactures interface converters with 10,000 converters installation base. The company has developed hand held battery operated and remotely located data down loader [ddl] for downloading data from multiple loggers/serial devices. The data down loader stores the data in its memory that can be uploaded on a pc with the help of pc end windows at a convenient time. The data down loaded can record an unlimited number of records that is only restricted by the size of the record data. The hand held data down loader is a micro controller based device with 64 k memory and a rs232 communication port for uploading data from various field devices/loggers and downloading to pc. The company can supply the hand held data down loader the protocols on serial side as per users needs. The data down loader comes with salient features of having 8 character, 2 line lcd display and 3 pcb mounted tactile keys for selecting and changing parameters and menu screens. The data down loader can also make possible host device configuration optionally. The data down loaders can be powered by 9 v dc battery with power on/off slide switch and comes with 200 gm weight and phoenix bopla, abs plastic, hand held enclosure. The company supplies the handheld data down loader with 120[l] x 68 [w] x 20 [h] dimension and optional features like password protection, communication failure detection and ddl memory full message.