Section Half Multisensor Logger (SHMSL): User Guide
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Manual Information
Author(s): | M. Hastedt; B. Mills; Revised: T. Cobb |
Reviewer(s): | T. Cobine, D. Houpt, H. Barnes |
Supervisor Approval: | D. Houpt |
Audience: | Scientists, Marine Laboratory Specialists |
Origination date: | 5/6/08 |
Current version: | 372 |
Revised: | Draft 1/3/2014 (IODP-II); 6/15/2017; 371T; 372 |
Domain: | Physics |
Analysis: | Section Half Multisensor Logging |
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Contents
Manual Information
Contents
Introduction
Apparatus, Reagents, & Materials
Setting up the M-Drive Motion Control
Setting Measurement Parameters
Running Samples
Calibrating the Sensors
Data Handling
Quality Assurance/Quality Control
LIMS Integration
Health, Safety, & Environment
Maintenance/Troubleshooting
Vendor Information and Part Numbers
Related Documentation and Links
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Introduction
The Section Half Multisensor Core Logger succeeded the Archive-Half Multisensor Track (AMST) in the physical properties laboratory. The SHMSL simultaneously measures spectral reflectance and magnetic susceptibility on core section halves. Data generated from these sensors are used to augment the core descriptions.
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–Measured at the same data acquisition rate as spectral reflectance using a contact probe with a flat 15 mm diameter sensor.
–The sensor can be configured for different integration times (1 Hz or 0.1 Hz) and different numbers of replicate measurements. Our standard conditions are 3 measurements at 1 Hz measurement frequency for each offset. These three results are averaged and uploaded to the database. Thermal drift is effectively eliminated by zeroing the meter before each section.
–Data are reported in dimensionless instrument units (SI). In order to use these data as SI magnetic susceptibility units, the appropriate volume correction must be applied, which varies by sensor type. The user should not use the cgs setting so that the data set is consistent with previous measurements and with the whole-round logger results.
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Apparatus, Reagents, & Materials
Hardware
The SHMSL system consists of the following hardware components (Figure 1):
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Specification | Value | |||
Dimensions (mm) | 165 x 145 x 50mm _GoBack | _GoBack | ter diameter | |
Operating frequency (kHz) | 0.930 | |||
Depth of Response | 50% at 3mm | |||
Measurement period: |
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Temperature induced drift | <2 x 10-5 SI in 5 min | |||
Calibration (tip contact) | K x 10-5 SI (1cc) |
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The IMS immediately initializes the system hardware (Figure 3): the track system is initialized first, finding the home position for the Y- and then the Z-axes. Following that, the laser displacement sensor, magnetic susceptibility probe, and spectrometer are initialized (Figure 4).
Figure 3. IMS Initialization
Figure 4. IMS Application Main Screen.
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- The MS standards are used to check for drift, not to calibrate the meter or sensor. The JRSO puck is used to check drift instead of the Bartington standard because it is less sensitive to centering the sensor.
- Bartington-issued MS puck (note: user must center this standard carefully to get the correct reading)
- JRSO-created verification puck (~48 SIx10-6; mounted on track)
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Setting up the Instrument Sensors
This section is for advanced users only!
Each instrument sensor is set up through Instruments > Sensor Name > Setup (Figure 5). The parameters discussed in this section are common for all sensors on the SHMSL.
Figure 5. Setup Instrument Sensors
Instrument offset: track position of the laser where the center of the sensor is over the benchmarks zero edge.
Sensor/Contact width: physical width of the sensor that makes contact with the core's surface.
Analysis name: LIMS analysis component (must match LIMS component exactly).
Instrument group: LIMS instrument group logger name (i.e., SHMSL).
Model: model name of the sensor (from manufacturer).
S/N: serial number of the sensor (from manufacturer).
Menu name: value that appears as the instrument's menu name.
Full name: value that appears in instrument dialog boxes.
Description: instrument purpose; used in the System Information report.
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- Standard name: standard's LIMS label_ID component value.
- Text ID: standard's LIMS text_ID component value.
- Standard's value: Value established by IODP is 48 +/- 2 SI
- Standard X-offset: track position (X-axis) of the laser when the center of the MS sensor probe is over the center of the standard.
- Standard Y-offset: lift position (Y-axis) when the MS sensor probe is in contact with the standard.
Figure 6. MS2K Parameters
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The SHMSL software also has a utility feature (shown in Figure 7, below) that allows the user to test the MS performance. The MS utility allows the user to zero the meter and to set it to continuous measurement.
Figure 7. MS2K Utility
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The Ocean Optics QE Pro spectrometer can be set up using the screen shown in Figure 8.
Figure 8. QE Pro Sensor Setup
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- Hi cut-off and Low cut-off: determine region of interest (ROI) in the spectrum.
- Bin size: width of each channel.
High Cut-OffLow Cut-OffBin Size
Figure 9. Illustration of high and low cut-off and bin size.
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The standards used for the calibration of the QE Pro (99% white Spectralon® standard and the "dark" standard, achieved by turning off the lights) are defined using the tool shown in Figure 11. Do not use this screen if you are not trained!
Figure 11. QE Pro Standard Editor
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The AR700 parameters are metadata and do not have an effect on the measurements. Their nominal values are shown in Figure 12.
Figure 12. AR700 Sensor Setup
The AR700 configuration screen, shown in Figure 13, show the options available for the laser. These parameters are loaded to the AR700's on board memory and their values are returned in the AR700 Config Report panel (lower left). The utility can also be used to measure distances of a known metric to ensure that the laser is returning true distance values.
Figure 13. AR700 Configuration
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Setting up the M-Drive Motion Control
This section is for advanced users only!
- To access the motion controller setup window, select Motion > Setup (Figure 14).
Figure 14. M-Drive Motor Control
From the M-Drive Motion Setup window (Figure 15, five setup panels can be accessed:
- Track Configure: Motor and Track Options
- Track Configure: Limit and Home Switches
- Track Configure: Fixed Positions
- Motion Profiles
- Y-Axis Setup
Figure 15. M-Drive Motion Controls
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- Encoder Pulses/rev: 2048
- Screw Pitch: 1.00000E+0
- Gear Ratio: 1.00000
- Direction of Positive Motion: CW for positive encoder counts
Figure 16. Track Motor and Options
Once these values have been properly set you should never, never have to change them. This panel is only used for the initial setup.
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- Max Section Length: not configurable for this axis
- Track Length: not configurable for this axis
- Load Position: -3.0 cm
- Unload Position: -3.0 cm
- All "PUSH Track Only" settings = OFF.
Figure 17: Track Configuration
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The screen shown in Figure 18 allows the user to configure the motion logic of the track. The SHMSL X-axis (down-core motion) and Y-axis (vertical sensor motion) are configured using this screen. As shown, the X-axis is "CW Look @ CCW Edge" logic (the first option). The Y-axis is "CCW Look @ CCW Edge" logic (the third option).
Figure 18. Limit and Home Switch Configuration
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The following table shows the motion profile settings for the SHMSL X and Y axes controlled by the interface shown in Figure 19, below.
Axis |
X-Axis | |||
Y-Axis |
Profile | ||
Speed | Accel. | Decel. | Speed | Accel. | Decel. | |
DAQ Move | 5.0 | 30.0 | 30.0 | 3.0 | 5.0 | 5.0 |
Limit Seek | 3.0 | 10.0 | 80.0 | 3.0 | 10.0 | 80.0 |
Home Final | 0.5 | 2.0 | 80.0 | 1.0 | 10.0 | 80.0 |
Load/Unload | 15.0 | 10.0 | 10.0 | 10.0 | 5.0 | 5.0 |
Top/Profile | 5.0 | 30.0 | 30.0 | N/A | N/A | N/A |
User Defined | 5.0 | 5.0 | 5.0 | N/A | N/A | N/A |
Lift-Up | N/A | N/A | N/A | 5.0 | 5.0 | 5.0 |
Lift-Down | N/A | N/A | N/A | 3.0 | 5.0 | 5.0 |
Lift-Down Slow | N/A | N/A | N/A | 1.0 | 5.0 | 5.0 |
Y-Axis SetupTable: Motion Profile by Axis for SHMSL
Figure 19. Motion Profiles
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Y-Axis Setup is found in the DAQ menu option as shown in Figure 22, below. The Y-Axis setup is used to define the working distance for the AR700 laser. The screen shown in Figure 20, below, shows a typical set of standoff values for the various parameters, but if anything is changed on the Y-axis mount, these values should be determined experimentally.
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Note: For very soft sediments, it may be necessary to set the Touch Compression to 0.0 cm.
Figure 20. Y-Axis Lift Setup
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Setting Measurement Parameters
This section is for advanced users only!
Before measurement parameters can be set or changed the IMS must be unlocked. Note: Changing setup parameters can cause problems. Make sure you know what you are doing before changing any setup parameters.
Under File, select Unlock Setup as shown in Figure 21 below, then have the laboratory specialist type the unlock code into the keypad window (Note: this only has to be done if the setup has been locked, it usually remains unlocked).
Figure 21. IMS Control
To open the measurement editor, select DAQ > Measurement Editor as shown in Figure 22.
Figure 22. DAQ Control
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In the Measurement Editor window, loaded instruments are shown in the Select Instrument fields. Click on an instrument to see its measurement parameters in the Instrument Parameters field.
Click the Instrument Parameters window to open the editor for that instrument. This will invoke the screen shown in Figure 23.
Figure 23. Measurement Editor Screen
The MS2K and QE Pro have similar editor screens (Figures 24 and 25, respectively). From each screen you can set the following parameters:
Interval (cm): set to 0.1 to 20 cm; intervals for both the MS and reflectance should either be the same or multiples of one another and whole number divisors of the distance between the sensors. If they are not whole number divisors, an inefficient landing schedule will be developed, taking much longer to analyze a core section.
Edge (cm): how close to measure to an edge (top and bottom of a section as well as edges of voids within the section). The distance is measured from the center of the sensor (MS2K sensor width = 4 mm or 10 mm, depending on orientation; QE Pro sensor width = 8 mm). Edge width = 1.0 cm works well.
Control (on/off): whether to measure a mounted control standard at the end of every section measurement.
Online (on/off): set the instrument online or offline.
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Method: this is a selector between single or stacked (average) measurements.
Stack #: set the number of measurements to stack and average.
Figure 24. MS2K Measurement Parameters
Figure 25. QE Pro Measurement Parameters
Click OK to save settings to the instrument configuration file and return to the Measurement Editor.
Only one parameter can be set for the laser, and that is Gap Detection Offset shown in Figure 26. This is the height below the benchmark which will be tagged by the system as a gap and will therefore not be measured. For piston cores, the recommended gap offset should be set to 10 mm or less. For hard rock cores, the gap offset should be set between 20 and 30 mm.
Figure 26. Gap Detection Offset
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