ZCorr: comparative analysis of zcorr versus other correlating logger systems

Feature	ZCorr	Other Correlating Loggers

Logger Battery Life
Warranted	3 years	not published
Expected	10 years or 1,500 recordings (whichever comes first)	5 years

Logger Recording
Recording gain	Up to 800V/g	Not published
Digital accuracy	23 bits (1 part in 500,000)	12 bits (1 part in 4,096)
Intelligent data encoding	Yes	No
Maximum no. of readings	Up to 4,000,000; determined intelligently by logger	650,000 – standard (expandable to 1,350,000 on request)
Synchronization	1 part in 100 million	Not published

PC Communications / Data Downloading
Hardware	ZCorr docking station with 8 plugin, cable – less logger receptacles	Fixed 2, 6, or 12 logger interface units with cabled logger connections
Data transfer technology	USB	RS – 232 serial
Data transfer rate	1,024 kbps (actual)	Up to 115.2 kbps (maximum)
Download time	10 seconds or less per logger	Not published

PC Software – Leak Pinpointing Analysis
Filtering methods	ALFA™ Automatic Manual	Not Available Automatic Manual
Correlation assessment	Correlation Score of 0 – 100	Correlation results color – coded
Data management	ZCorr data manager, database features, search, sort, export to Windows & GIS programs