Multi-Sensor Core Logger Manual
This introduction presents an overview of the capabilities and features of the Multi-Sensor Core Logger (MSCL). Itdescribes the major features of the logging systems and outlines variations that occur between different generations of logging systems. The organisation and use of this manual are described, notational conventions safety symbols and abbreviations are explained.
The Multi-Sensor Core Logger (MSCL)
The Geotek Multi-Sensor Core logger has been built for a range of users since 1989. During that time the logging system has inevitably evolved with significant improvements being made to the simplicity of the mechanical arrangements, the effectiveness of the sensors and in particular with the sophistication of the software. Consequently there are a number of slightly different systems in use. Despite this natural evolution Geotek has been conscious of the need to update older systems so that important new features can be incorporated. This is particularly true with the software, which has been designed to function on all systems with only minor modifications to the electronics and hardware. If you find features described in this manual that do not seem to apply to your system then contact Geotek directly for an assessment of the upgrade potential.
Types of Logging Systems
Single Section - Whole Cores - Core Boat
Early versions of the logger moved the core sections through the sensor systems using a core boat in which each whole core section was placed. Each core section was logged individually. Data files were subsequently manually concatenated by the user within a spreadsheet.
Single Section - Whole Cores - Core Pusher - Long Belt
Later versions of the logger did not have a core boat. They moved individual whole core sections through the sensor systems by using a core pusher to push individual core sections (lying on plastic rails) through the system. This was achieved using a long belt that went around the complete length of the track, through the sensor systems and was attached to the core pusher.
Multiple Sections - Whole Cores - Core Pusher - Short Belt
Recent versions of the logger have maintained the core pusher principle but have a short belt which allows the pusher only to move along the right hand section. Cores are passed through the complete sensor array by butting adjacent cores together. In this way a continuous core logging process is achieved with continuous data sets for a complete core.
Multiple Sections - Split Cores - Core Pusher - Short Belt or Ball-screw
The most versatile logging system is now the split core logging system that is floor mounted and measures p-wave Velocity and Gamma Density either horizontally through whole cores or vertically through whole or split cores. It features a moving vertical slide onto which is mounted the upper p-wave transducer (either the older type that required water coupling or the new Acoustic Rolling Contact (ARC) type). This automated vertical slide enables the measurements to be performed on horizontally split cores as well as whole rounds. With this system there is a large degree of flexibility that enables other sensor systems to be attached.
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