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1. Make sure the sensors are clean.
2. For section halfs, place the desired measurement location underneath the desired sensor. Make sure that the section is oriented with the blue end-cap towards the laser (Figure 2).

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Figure 2.- Correct core position.

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3. The program continually updates the velocity calculation and displays the value (Average of the sets of stacks) in the Velocity-Auto box (Figure 5).

Figure 5.- Signal graph and data display on the Velocity-Auto box.

It also displays a signal graph with a red vertical auto-pick location line (Figure 56), where the program's algorithm has placed the first arrival wave.Figure 5.- Signal graph and data display on the Velocity-Auto box.
Note: Typical slide bar settings are 100 for the stack bar and10mV for the threshold bar.

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Figure 6.- Clean waveform indicating a strong/good signal.

4. Click Save Data

Note: If the velocity is out of the expected range, or the pick location is not near or at the first arrival wave, contact the PP technician.

5. The Section Sample Information screen is displayed.

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

    Additional entry field options are the LIMS and MANUAL

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tabs.

7. Check that the test offset data is correct for section halves. If you are measuring a discrete sample, the offset is already in the database.

8. Click Save Data

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Credits
This document originated from Word document Gantry Velocity: Quick Start Guide Version 1.0; Version 372 written by A. de Loach (2017-12-16). Credits for subsequent changes to this document are given in the page history.
Archived Versions
P-Wave Quick Start Guide (*.pdf)
PWV_QSG_372.docx: A Word document of the Gantry Velocity: Quick Start Guide

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