Introduction

The Natural Gamma Ray Logger (NGRL) measures the ammount amount of natural gamma radiation within whole-round core sections. See 'NGRL User Guide' and 'Technical Note 26: Physical Properties handbook' for additional detaildetails.

The IMS software for the NGRL does not produce “KUT” data.  Scientists are welcome to use a Matlab code for this purpose here (NGR Quantification of U, K, and Th).

Procedures

• Preparing the Instrument

1. Double-click the MUT icon on the desktop (Figure 1a) and login using ship credentials. For more information on data uploading see the "Uploading Data to LIMS" section below.
2. Double-click the IMS icon (Figure 1b). IMS

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1. initializes the instrument and checks the movement of the track. Once initialized, the logger is ready to measure the first section.

Figure 1. - (a) MUT Icon. (b) IMS Icon.

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1. Wipe off excess moisture and/or mud from the core lineliner.
2. Tape any drill holes, when applicable.

Note: All core sections entering the NGR must be completely dry. Any moisture or liquids liquid present will DAMAGE the instrument.

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1. Place section in the core tray. Make sure the section is oriented blue endcap towards the instrument, and is flush placed against the top of the metal boat (Figure 2).

Figure 2. - Correct core position.

2. Click Start. The Section Information screen is displayed (Figure 3).

Figure 3. - NGR Section Information screen. User Length box is marked in the red square.

3. Place the cursor in the SCAN field and scan the section label. SAMPLE ID and LIMS ID automatically fills. These This ID tags contain tag contains information on expedition, site, hole, core, section number and length.

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6. The boat moves to the first measurement position, and begins measurements. Once finished, if selected, the boat moves to the second position, and begins measurements. The typical measurement rate is 300 seconds each per position. Real time graphs are displayed during acquisition (Figure 4). The graphs display the counts for each detector at each position, also the full spectra for each detector.

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Figure 4. - NGR real-time graphs.

7. Once the measurement is complete, the boat returns to the original load position.

8. All instrument data are stored in C:\DATA\IN.

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1. Click the MUT Icon. Log in using database credentials.
2. Once activated, the list of files from the C:\DATA\IN directory is displayed. Files are marked ready for upload by a green check mark (Figure 85).

Figure 85. - Main MUT screen

3. To manually upload files, check each file individually and clip upload. To automatically upload files, click on the Automatic Upload checkbox.

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All improvements to the Quick Start Guides and User Guides are a communal effort, with honorable mention to the group of LOs, ALOs, and technicians who have helped.

Archived Versions

• NGR Quick Start Guide - 27Sept2022
• NGRQuickStartGuide_v368X.pdf
• NGR Quick Start Guide 2020 (*.pdf)
• LMUG-NGRQuickStartGuide v2020: An exported PDF version of this wiki page as of 2020-10-28.

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