1. Experience with Earth Data Digitizers and Seislog Jens Havskov Department of Earth Science University of Bergen Norway ESC Potsdam, September 2004

2. - UiB has used ED digitizers since around 1993 - Currently using old model EDM006 and newer model PS2400 - Digitizers have only been used with Seislog software -Seislog for QNX -Seislog for Windows -Seislog for PocketPC -A Seislog Linux is now being tested

4. Seislog system Seislog is a general purpose data acquisition system running on different platforms. All system supports digitizers from 8-10 different manufactures. QNX Seislog: In operation since 1995, support one digitizer at a time, records in Seislog format. About 100 currently in operation. No further software development. Windows Seislog: In operation since 2000, supports several digitizers at the same time, records in SEISAN format, > 20 in operation. WindowsCE Seislog: In operation since 2001, supports only one digitizer at a time, records in SEISAN format, > 5 in operation. Linux Seislog: In operation since 2004, supports several digitizers at the same time, records in SEISAN format, 2 in test operation.

5. Old ED digitizer 3 Units in operation since 1995 One channel damaged in 9 years Very stable

6. New ED digitizer 5 in operation in Norway since 1998 Stable operation, good S/N ratio Several have been returned for repair Sensitive to humidity, in Norway this has introduced instability in operation (1 s spikes, funny signals etc). All are now indoors, which seemed to cure the problem RS232 output will not work with a some PC’s

7. New ED digitizer in Guatemala, South Africa and Spain Guatemala: Digitizers installed in field in well aired concrete houses, there has not been any problems since installation one year ago. Spain and South Africa: Apparently working ok, have no detailed information.