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Changes for page Field Deployment Guides

Last modified by KB on 2025/08/12 12:18
From version 22.1
edited by Jack Dent
on 2025/02/04 14:50
Change comment: There is no comment for this version
To version 24.1
edited by Jack Dent
on 2025/06/12 12:22
Change comment: There is no comment for this version

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16 16  * Accessibility and security of the site are also important factors.
17 17  * Conduct a detailed survey of the site, including topographical, geological, and geophysical assessments.
18 18  * Prepare the site by clearing vegetation and levelling the ground.
19 -* A complete site with two metal panels will have dimensions of roughly 50cm high (not including the star picket or stake), 75cm deep (between the bases of the panels) and 92cm wide (the width of one panel).
20 20  
21 21  = **Installing Sensors** =
22 22  
23 23  * Bury seismometers at an appropriate depth for noise reduction and stable ground coupling, typically 0.5-0.8 metre depth.
24 -* Orient the sensors correctly using a compass, paying special attention to the north direction. When using a compass to orient the sensors, ensure it is kept away from metal objects or structures that could interfere with its magnetic field. Accurately determine the north direction for precise sensor orientation.
25 -* Ensure the sensor is levelled correctly. A paver or concrete slab can be used to allow for more accurate levelling.
23 +* Ensure the sensor is levelled correctly, typically the sensor can be placed on a well levelled paver to make this easier.
24 +* Orient the sensor correctly using a compass, paying special attention to the north direction and accounting for declination.
25 +** When using a compass to orient the sensors, ensure it is kept away from metal objects or structures that could interfere with its magnetic field.
26 26  * It is recommended that the following sensors be installed with a PVC tube covering to prevent corrosion and other environmental degradation:
27 27  ** TC-120
28 28  ** TC-20
29 29  ** 3D lites
30 -* Hold the sensor or sensor covering securely while infilling and compacting the hole to ensure the sensor is kept level.
30 +* Hold the sensor or sensor covering securely while infilling and compacting the hole to ensure the setup is kept in the correct position (level and oriented).
31 31  
32 32  = **Setting up Data Logger** =
33 33  
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60 60  
61 61  (% class="box errormessage" %)
62 62  (((
63 -DO NOT bury the sensors using anything other than the supplied ANU PVC housing tube, or a direct burial. Other methods may damage the equipment more than protect it. In particular, burying a sensor in a plastic bag (no matter how well you think you've sealed it) will trap water inside and cause exponentially more damage than a simple direct burial.
63 +DO NOT: bury the sensors with anything other than a PVC housing or direct burial. Other methods may damage the equipment more than protect it.
64 64  )))
65 65  
66 66  = **Step-by-step field installation guide (with images)** =
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118 118  12. A completed site. Rocks and sticks can also be piled on the ends of the cage if there is a risk of animals tampering in the area.
119 119  )))
120 120  
121 +
122 +
123 += Experimental Sand Burial: =
124 +
125 +Direct burials are used for Trillium Compact Postholes as they are specifically designed to be corrosion resistant. Other sensors such as the Trillum Compact 120, Trillum Compact 20, and 3D Lites are not built with this degree of corrosion resistance. Currently, the best prevention for moisture trapping and corrosion is burying them with a PVC covering. However, in particularly wet environments, some moisture can still collect within these coverings. One experimental method that is being trialled in hopes of providing better drainage is the sand burial. Steps 1, 2, and 3 remain the same, though once the sensor is set with the correct levelling and orientation, the subsequent infill steps differ. Once the open PVC tube is placed around the sensor, infill the hole around the tubing, holding it in place (image A). Once the hole is back-filled level with the tubing, securing it in place, begin filling the interior of the PVC tube with sand. Hold the sensor in place and ensure the sand is packed tightly around it (image B). Once the sand fills the PVC tube, gently remove the PVC tube while holding the sensor in place (pliers may be required to grip the tube). The last deviation for a sand burial from the standard burial is continuing to place some sand above the sensor, and dirt (or other local substrate around that sand pocket) until level with the surface (image C).
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