Borehole Package Preperation

	Connecting borehole accelerometer cables.		A close-up view of borehole accelerometer with PVC guiding piece attached.
	Internal compass is calibrated by placing the borehole accelerometer in a PVC jig. A PVC jig is a two foot long 4 in. schedule 40 PVC casing mounted on a wooden base with non-magnetic screws.		Borehole accelerometer is ready for installation.