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■ <br /> PRECiSION <br /> • i <br /> 2 0 Electronic Piezocone (CPTU) Specifications <br /> Cone <br /> • 20-ton digital cone (thermal sprayed tungsten carbide coating) <br /> • Stram gauge load cell measurement <br /> • Outside diameter- 1.6" <br /> • Temperature compensated <br /> • Calibrated against a NIST standard <br /> Tip Resistance <br /> • Tip area- 10 cm2 <br /> • Rated Range: 33000 lb <br /> • Apical angle. 600 <br /> • Frequency of measurement: 2-4 cm <br /> • Measured data- Force /base area = qC <br /> Friction <br /> • Surface area: 150 cm2 <br /> • Rated Range: 5700 lb <br /> • Location- behind pore pressure element <br /> • End area ratio: 0.85 <br /> • Measured independently of cone tip <br /> • Frequency of measurement: 2-4 cm <br /> • Measured data- Force / surface area = fs <br /> Pore Pressure <br /> • Rated Range: 500 psi <br /> • Location- Behind tip (U2 position) <br /> • Composition: Polypropylene porous plastic (5mm thickness) <br /> • Saturation liquid: Silicone liquid <br /> • Saturation method: High vacuum with heat and vibration <br /> • Measured data: U—Measured pore pressure (while advancing) <br /> Uo — Equilibrium pore pressure (while stopped) <br /> • Frequency of measurement: 2-4 cm <br /> • Pressure changes are measured with a diaphragm type electronic pressure <br /> transducer <br /> 1400 South 50th Street• Richmond, CA 94804 • (510) 237-4575 • FAX (510) 237-4574 <br /> h www preciagnngMphng com <br /> Natconwtde Direct-Push Sermoes <br /> 1-800-671-4744 <br />