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APPENDIX A. SPECIFICATIONS
A.1 EARTH PRESSURE CELLS
Model:
4800
Earth Pressure Cell
(rectangular)
1
70 kPa (10 psi)
Ranges:
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)
Resolution:
±0.025% FSR
2
±0.5% FSR (±0.1% FSR with a polynomial expression)
Accuracy:
Linearity:
±0.5% FSR (standard), ±0.1% FSR (optional)
Overrange:
1.5 x Rated Pressure
Operating Temperature:
-20 to +80° C
Excitation Frequency Range
1400-3500Hz
Output Frequency Range
2000-3000Hz
3
150 × 250 mm
Cell Dimensions:
6 × 10"
(active area)
150 Ω
Coil Resistance:
Material:
316 Stainless Steel
Weight:
2.3 kg. (5 lbs.)
Two twisted pair (four stranded conductor), 22 AWG
4
Electrical Cable:
Foil shield (with drain wire), PVC jacket, nominal OD=6.3 mm (0.250")
TABLE 4: Earth Pressure Cell Specifications
Notes:
1
Consult the factory for other ranges available
2
The stated accuracy is the accuracy of the pressure transducer. The total
system accuracy depends on many factors, as discussed in Section 1.1.
3
Consult the factory for other sizes available.
4
Consult the factory for alternate cable types.
A.2 STANDARD TEMPERATURE THERMISTOR
Range: -80 to +150° C
Accuracy: ±0.5° C
MODEL 4800 SERIES VW EARTH PRESSURE CELLS | SPECIFICATIONS | 21
4800
4810
Earth Pressure Cell
Contact Pressure Cell
(circular)
70 kPa (10 psi)
170 kPa (25 psi)
350 kPa (50 psi)
350 kPa (50 psi)
700 kPa (100 psi)
700 kPa (100 psi)
1 MPa (150 psi)
1 MPa (150 psi)
2 MPa (300 psi)
2 MPa (300 psi)
3 MPa (435 psi)
3 MPa (500 psi)
5 MPa (750 psi)
5 MPa (750 psi)
7.5 MPa (1100 psi)
20 MPa (3000 psi))
230 mm OD
230 mm OD
9" OD
9" OD
2.3 kg. (5 lbs.)
4.7 kg. (10.3 lbs.)
4:
4820
Jack-Out 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
5" OD
2.7 kg. (6 lbs.)
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