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Tokyo Sokushin VSE-355G3 Servo Velocity-meter

Product: made in Japan
Manufacturer: Tokyo Sokushin
Model: VSE-355G3

Ground type velocity-meter with built-in wider broad band and higher resolution tri-axis, and possible to measure from micro to strong motion.

BROADBAND

2m/s & 20m/s2 (2000Gal) Maximum 146dB Dynamic Range 0.008Hz to 70Hz 2m/s & 20m/s2

(2000Gal) Maximum

146dB Dynamic Range

0.008Hz to 70Hz

(      Strong Motion   )

(~ Micro Earthquake )

a) The data are extracted from “Performance of the VSE-355G2 Strong Motion Velocity SeismometerReport to the IRIS-GSN Sub-Committee’. Clinton, J.F. and Heaton, T.H.,Caltech, 2002”
b) VSE-355G3 is revised model of VSE-355G2.

Specifications

ModelServo Velocity Seismometer VSE-355G3
Mode of operationTri-axial
Frequency range0.008 to 70Hz
Max. measuring range±2m/s, 20m/s2 (±2000Gal)
Sensitivity5V/m/s × 2
Max. Output voltage±20V(Balanced output)
Tilt Output5.13V/0.1degree
Resolution10-8m/s2 (10-6Gal)
Dynamic range146dB
Calibration coil15μA/Gal, 1000Ω
LinearityLess than 0.03%
Cross axis sensitivity0.50%
Sensitivity of Temperature coefficient0.01%/℃
Temperature coefficient of zero-shift0.05%/℃
Power requirements±15VDC
Current consumption150mA
ArresterVoltage 30V, Current 5kV, 100A
Temperature range-10℃ to 50℃
Allowable shock30G (less than 0.1sec)
Dimension330 × 330 × 243.1 mm
EnclosureWaterproof 1kg/cm

Frequency response

Comparison of Noise Specter

The clip level of VSE is larger than STS-2. Therefore the noise level of VSE is larger than STS-2.

Calculated Ground Displacement

It is generally observed the abnormal results in calculated displacement from the accelerometers however normal results are observed from the velocity.
(Actual result at 1995.1.17 Hanshin-Awaji Strong motion earthquake)

Recording Range

VSE-355G3 can record the important seismic signals shown by blue area.

Dimension

The specification may change without notification because of the proved product.

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