Table 1.

Technical specifications of the CPT Icone digital cone.

“Icone” Digital Cone	Technical Characteristics	Maximum Range
Resolution	24 bits (Ix/Iy 16 bits)
Cone tip area	10 cm2
Available parameters	$q_c$$, f_s$$, u_2$, Ix/Iy
Memo function	16 Mbit (8 hrs. CPT operation)
Real-time data processing
Cone resistance ($q_c$)	75 MPa	150 MPa
Minimal accuracy for Class 2	100 kPa or 5%
Sleeve friction ($f_s$)	1 MPa	1.5 MPa
Minimal accuracy for Class 2	15 kPa od 3%
Pore water pressure (u)	2 MPa	3 MPa
Minimal accuracy for Class 2	25 kPa od 2%
Inclination (Ix/Iy)	20°	25°
Minimal accuracy for Class 2	2°