Japan, Tokyo Sokushin
Tokyo Sokushin VSE-355JE Servo Velocity-meter
Product: Made in Japan
Manufacturer: Tokyo Sokushin
Model: VSE-355JE
Bore-hole type velocity-meter with built-in tri-axis to measure the strong motion
Simultaneously output the velocity and acceleration
Surface mount model
Practical Use
Specifications
Seismometer
| Model | VSE-355EI (Ground surface type) VSE-355JE (borehole type) |
| Frequency | 0.018 to 100Hz |
| Mode of operation | Tri-axial |
| Max. measuring range | ±2m/s, ±20m/s２(±2000Gal) |
| Output (triple) | Velocity(L): 5V/m/s, (H): 200V/m/s Acceleration: 500mV/m/s2(5mV/Gal) |
| Output resistance | Less than 50 Ohm |
| Max. output voltage | ±10V |
| Linearity | 0.03% of Full scale |
| Resolution | 10-7m/s２ (10-5Gal) |
| Dynamic range | More than 136dB |
| Damping ratio | 10000% to 20000% (h = 100 to 200) |
| Calibration coil | (15μA/Gal) Coil resistance: 550Ω (±20%) : Sensitivity: 1.5mA/m/s2 |
| Power requirements | ±15VDC |
| Current consumption | Approximately 90mA |
| Linearity | Less than 0.03% |
| Cross axis sensitivity | 0.03G/G |
| Temperature coefficient | Sensitivity:0.01% / ℃ Zero shift: 0.05% / ℃ |
| Arrester | Voltage 30V, Current 5kV, 100A |
| Temperature range | -10℃ to 50℃ |
| Extension cable | 20 Core Shielded Cable |
| Allowable shock | 30G (Less than 0.15Sec) |
| Dimension | VSE-355EI: 260 × 260 × 159.6 mm VSE-355JE: φ80 × 764.2 mm |
| Waterproof case | VSE-355EI: 98kpa VSE-355JE: 3000kpa |
Power Unit
| Model | PF-604 |
| Input | Tri-axis (Standard) |
| Output | Vel.(H), Vel.(L), Acc. of each components |
| Display | Zero-voltage indication of the elected component |
| Monitor output | Vel.(L), Vel.(H), Acc of the selected component |
| Power requirement | AC85 to 132V |
| Dimension | 480 × 150 × 300 mm |
| Operating temperature | -10℃ to 45℃ |
Theory
Equation form of Velocity and Acceleration are expressed as:
Readout signals are very steady because m, R, C, and Gs are steady value.
Not including the factor of displacement sensor of pendulum is important.
The specification may change without notification because of the proved product.
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