Humboldt HM-4502 Double-Ring Infiltrometer - Manual (Page 2)

The Double-Ring Infiltrometer is designed to meet standards for conducting
infiltration of water into soils in the field. It consists of two (2) stainless steel
rings, measuring 12" and 24" diameter x 20" high. The rings incorporate a
welded, double edge on the top for increased stability when driving them into
the soil.
There are two (2) mariotte tubes, which provide a constant head of water for the
test. The tubes are supported on a steel plate. Millimeter divisions on the side of
the tubes are used for determining the flow rate.
Also included is a 1/2"-thick aluminum driving plate with centering pins, which
ensure a simplified setup; two (2) 6" square neoprene splash guards and two
(2) mariotte tubes with 3,000cc and 10,000cc capacities.
Contents
(1) 12" stainless steel ring
(1) 24" stainless steel ring
(1) 3,000cc mariotte tube with base
(1) 10,000cc mariotte tube with base
(4) brass fittings with 1/4 NPTF and 3/8" ID tube connection. Brass barb tee for
water source connection.
(1) 30 ft. x 3/8" tubing (Cut to fit your setup for rings, marriotte tubes
and water tank
(1) aluminum cover/drive plate
(2) splash pads (6" square neoprene material)
Assembly
1)
Connect fittings to infiltrometer rings as shown in diagram 1.
2) Attach 3/8" ID tubing to fittings as shown in mariotte tube layout
diagram after driving tubes into ground. A light amount of grease or oil
on tubing connection will aid in attaching and removing the tubing
3) The 1/2" thick aluminum cover/drive plate has two (2) lifting handles on
the top. You will note that the three (3) inner dowel pins protrude through
the top. The 12" diameter tube is driven into the ground first and the
drive plate is positioned with the inner pins facing down to align the inner
tube. The inner ring can now be driven into the ground.
The outer ring can now be centered around the inner ring and the drive
plate positioned to the outer ring with the handles facing up. The outer
ring can now be driven into the ground.
4) Filling the Marriotte Tube:
Close the ring water fill valve. Open the vent valve at the top of the Mar-
riotte Tube to allow air to escape during the filling operation. Open the