Multi Channel

Currently, the only controlled active source available from PASSCAL is the PEG 40Kg Propelled Energy Generator, manufactured by R.T. Clark Companies, Inc. PASSCAL has purchased its first fully automated PEG-40Kg system in 2011. The system is light weight, and highly portable, and is designed to easily mount onto a truck or SUV hitch. Seismic energy is produced when  a large hammer mass weight is propelled by an elastomer band (i.e. a very large rubber band) onto an impact plate, producing an impact frequency range of 10-250Hz. The source is controlled with a hand held motor controller,  and can operate in single cycle or continuous cycle mode. The device is powered by a 12V large capacity battery (car battery).  The PEG-40Kg was received, assembled, and field-tested by  PASSCAL staff on June 23rd-28th, 2011.

A datalogger (also know as data acquisition system or DAS) is piece of electronic equipment which converts an input into a digital time series representation. Immense care should be taken when setting up and programming a datalogger. It is highly recommended that only experienced users program their own dataloggers and all others should consult a PASSCAL staff member for assistance.

While specific procedures and programming details will vary between the various types of dataloggers, there are several things that hold true when working with any datalogger.

The datalogger should be:

GEODE 24-CHANNEL IN-FIELD SEISMOGRAPH.

System consists of one 24-channel Geodes, with two built-in high-speed connections to interface with other Geodes and a PC-compatible controller or the StrataVisor NZ seismograph.

Suitable for reflection, refraction, downhole, crosshole, surface wave, and tomography surveys, and seismic monitoring.

PASSCAL has been upgrading its pool of Multi-Channel Dataloggers in recent years to include multiple ES-3000 Geodes and a 60 Channel Strata View NZXP. These upgrades are also compatible with all of PASSCAL's Multi-Channel Cable System, which were originally purchased for use with the Geometrics StrataVisor NX. These  Units employ a new concept in portable exploration seismographs. They combine the ruggedness and high signal quality of a distributed system with the convenience and cost effectiveness of personal computer-based control devices. See Geode and Stratavisor Dataloggers for more Details.