Wiki source code of ERT

Last modified by Michael Sibayan on 2022/05/03 16:48

author	version	line-number	content
		1	= Overview =
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		3	The ERT system is composed of 120 electrodes. They are arranged in 24 stacks of 5 electrodes. A diagram of the electrode stack is shown below.
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		5	= Calculation Notes =
		6
		7	There are no calculation notes for these sensors.
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		9	= Wiring Diagram =
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		11	[[image:ERT-Schematic.png\|\|style="display: block; margin-left: auto; margin-right: auto; width="]]
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		13	= Other Notes =
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		15
		16	The electrodes are connected via gold plated pins (Millmax, part # 3601-1-07-21-00-00-08-0) to 22 AWG (7/30 strand) tinned copper wire. The wire is part of a 5-conductor cable (AlphaWire, part # 1175C, rated at 300V) color coded as follows:
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		18	1 – Green – closest to surface
		19	2 – Orange
		20	3 – Red
		21	4 – White
		22	5 – Black – closest to deck
		23
		24	The cable is PVC jacketed. In order to counter any negative effects of PVC in the soil, the cable is sleeved in 5/16” Teflon tubing. This creates a physical barrier between the PVC jacket and the soil. Pins are glued in place using DP190 or DP110 epoxy from 3M, joints are connected using DP190