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- Choose an appropriate test location on the sample (see Sample preparation).
- Measure the offset from the top of the sample section in centimeters and record in the logsheet, along with section text ID and whether the adapter foot is being used.
- Insert the vane manually (by turning handle on top of the Giesa) into the material until it is completely immersed (critical for accuracy and precision) in the sediment.
Important! If the brass spacer begins to extend on the top of the frame, the sediment is too hard for the Giesa AVS; discontinue the measurement.
- Select init on the Giesa GeoLAB main control screen to open a monitoring screen that shows near real-time values of torque and angle of rotation (see Figure 10).
- Set the sampling frequency in the sample-time field; a fair estimate is 1 measurement every 2 s.
- Click on the traffic light button to begin the test.
- Go to the Excel template screen to monitor the test in progress. When the maximum shear strength of the sediment has been reached, stop the test by clicking on the red stop-light button.
- Record the maximum torque and angle results on the logsheet.
- To save the results, go to the Excel template:
- Select File > Save As >
- Save to location: c:\data\strength\in
- Name: text ID_offset_AVS.csv
- Save as type: CSV (comma delimited)
- Close Excel after saving the file.
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Sample and Analysis Attributes and Components
Analysis | Component | Unit | Explanation |
VANE_SHEAR | offset | cm | Offset from top of section; location of measurement in section |
penetration_direction - into X - into Y - into Z - into –Z |
| x-, y-, or z-axis measurement |
rotation_rate | deg/s | Geisa vane rotation rate |
shear_strength | Pascal |
| |
residual_strength | Pascal |
| |
max_torque_angle | °circ |
| |
residual_torque_angle | °circ |
| |||
comment |
| From AVS data entry form | |
PENETRATE | offset | cm | Offset from top of section; location of measurement in section |
penetration_direction - into X - into Y - into Z - into –Z |
| x-, y-, or z-axis measurement |
adapter_foot - yes (1/16) - no (1) |
| Was adapter foot used for very soft sediment? |
compression_strength | kg/cm2 | Converted result |
comment |
| From PenStrength data entry form | |
TOR_SHEAR | offset | cm | Offset from top of section; location of measurement in section |
penetration_direction - into X - into Y - into Z - into –Z |
| x-, y-, or z-axis measurement |
adapter_id - regular (1.0) - large (0.2) - small (2.5) |
| Which blade was used on the device? |
shear_strength | kg/cm2 | Converted result |
comment |
| From PenStrength data entry form |
Viewing Logfile
At any time you may peruse the logfile. Click on the view logfile button from the AVS main control (Excel) program.
All actions and results are entered in this file. For example, if there is a problem connecting to the LIMS database, you can just go to this log to look at your results.
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- S/N 745-1, Made in Germany
- Analog force sensors (load cells):
- Type: KAB K1. 0,1 Bj.2004, Made in Germany
- mV/V = 50 N FNr 04-2929
- IP67
- A.S.T. GmbH Dresden
- Mars chnerstrasse 26 D-01287 Dresden
- Excitation (+)/SP+ brown
- Sense (+)/F+ gray
- Screen/SCH black
- Signal (+)/S+ red
- Sense (–)/F– blue
- Excitation (–)/SP– green
- Signal (–)/F– white
- Stepper motor with all cable connections
- Portescap Turbo Disc™ PP 520 00466, ED 0304
- Made in Switzerland
- Vane clamping device (uses keyless clamping chuck)
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