Appendix A. Specifications; Earth Pressure Cells; Standard Temperature Thermistor; Table 5 - Earth Pressure Cell - Geokon 4820 Instruction Manual

APPENDIX A. SPECIFICATIONS

A.1 Earth Pressure Cells
Model: Earth Pressure Cell
(rectangular)
70 kPa (10 psi)
170 kPa (25 psi)
350 kPa (50 psi)
700 kPa (100 psi)
1 MPa (150 psi)
Ranges:¹
2 MPa (300 psi)
3 MPa (435 psi)
5 MPa (750 psi)
7.5 MPa (1100 psi)
20 MPa (3000 psi)
Resolution:
4
Accuracy:
Linearity:
Overrange:
Operating
Temperature:
Excitation
Frequency
Range
Output
Frequency
Range
Cell
150 × 250 mm
Dimensions:²
(active area)
Coil
Resistance:
Material:
Weight: 2.3 kg. (5 lbs.)
Electrical
Cable:³
Notes:
¹ Consult the factory for other ranges available
² Consult the factory for other sizes available.
³ Consult the factory for alternate cable types.
4
The stated accuracy is the accuracy of the pressure transducer. The total system accuracy
depends on many factors, as discussed in Section 1.1.
A.2 Standard Temperature Thermistor
Range: -80 to +150° C
Accuracy: ±0.5° C
4800
Earth Pressure
70 kPa (10 psi)
170 kPa (25 psi)
350 kPa (50 psi)
700 kPa (100 psi)
1 MPa (150 psi)
2 MPa (300 psi)
3 MPa (435 psi)
5 MPa (750 psi)
7.5 MPa (1100 psi)
20 MPa (3000 psi))
±0.5% FSR (±0.1% FSR with a polynomial expression)
±0.5% FSR (standard), ±0.1% FSR (optional)
230 mm OD
6 × 10"
2.3 kg. (5 lbs.)
Two twisted pair (four stranded conductor), 22 AWG
Foil shield (with drain wire), PVC jacket, nominal OD=6.3 mm (0.250")
Table 5 - Earth Pressure Cell Specifications
4800
Contact Pressure
Cell
(circular)
350 kPa (50 psi)
700 kPa (100 psi)
1 MPa (150 psi)
2 MPa (300 psi)
3 MPa (500 psi)
5 MPa (750 psi)
±0.025% FSR
1.5 x Rated Pressure
-20 to +80° C
1400-3500Hz
2000-3000Hz
230 mm OD
9" OD
150 Ω
316 Stainless Steel
4.7 kg. (10.3 lbs.)
4810 4820
Jack-Out
Cell Pressure Cell
350 kPa (50 psi)
700 kPa (100 psi)
1 MPa (150 psi)
2 MPa (300 psi)
3 MPa (500 psi)
5 MPa (750 psi)
125 mm OD
9" OD 5" OD
2.7 kg. (6 lbs.)
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