04.
GENERAL INFORMATION The H-4120H and H-4120HA Corps of Engineers Cone Penetrometer is the principal instrument used in evaluating a soil's trafficability. The COE Cone Penetrometer can also be used during field investigations for a preliminary estimation of a subgrade treatment. It is lighter and less difficult to use than the Dynamic Cone Penetrometer. The COE Cone Penetrometer consists of a 30 degree cone 1/2 sq. in. base area, an 18 in. extension rod, a proving ring, a dial indicator and a handle.
G. CAUTIONS: Observe the following cautions: 1. Keep the instrument vertical. 2. Do not attempt readings higher than the capacity of the dial since this might overstress the proving ring . 3. If the dial capacity is exceeded at less than 18 in. (457.2 mm) of penetration, make another penetration nearby to be assured that the cone is not striking an isolated rock fragment. 4. Never withdraw the instrument by the ring but always by the rod. CARE AND ADJUSTMENT OF THE PENETROMETER A.
SPECIFICATIONS Proving Ring: 150 lb. capacity; dial indicator calibrated direct in psi, o to 300 psi by 5 psi subdivisions Shaft: 5/8" (15.8 mm) diam. x 19" I. (483 mm) Cone: 30 degree; 1/2 sq. in. base area Weight: Net 2 Ibs. (0.
1B 1A 5 2 6 7 10 8 3 4 Item Item Part No. Required 1A Handle, Mushroom H-4120H.12 1 1B Handle, T-Handle H-4120A.1 1 2 Proving Ring H-4120H.2 1 3 Staff, 5/8" dia. H-4120H.3 1 4 Cone, 1/2 sq. in. H-4120H.4 1 5 Stud, 5/16-24 SS H-4120H.7 1 6 Nut, 5/16-24 SS H-4120H.8 2 7 Screw, 5/16-24 x 7/8" Hex SS H-4120H.9 3 8 Block, Mounting H-4120H.10 2 9 Clamp, Mounting H-4120H11 2 10 Dial Indicator H-4120H.
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Humboldt Mfg. Co. 875 Tollgate Road Elgin, Illinois 60123 U.S.A. Testing Equipment for U.S.A. Toll Free: 1.800.544.7220 Voice: 1.708.456.6300 Fax: 1.708.456.0137 Email: hmc@humboldtmfg.com Construction Materials HUMBOLDT www.humboldtmfg.
