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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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