LGT-20D4.5检波器技术参数（20℃）
SPECIFICATIONS OF LGT-20D4.5 GEOPHONE ELEMENT
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检波器型号
Geophone Type
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LGT-20D4.5
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自然频率 Fn
Natural Frequency (Hz)
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4.5 ? 0.5
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开路阻尼系数 Bo
Open Circuit Damping
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0.70 ? 10%
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灵敏度 G
Intrinsic Voltage Sensitivity
(V/m/s)
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23.4 ? 7.5%
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线圈电阻 Rc
Coil Resistance (kΩ)
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395 ? 5%
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谐波失真 D
Harmonic Distortion (%)
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≤ 0.3
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典型假频（Hz）
Typical spurious frequency
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≥160
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线圈最大位移
Case to Coil Motion P-P (mm)
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1.5
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悬体质量M
Moving Mass (g)
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11 ?5％
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最大倾角
Maintains Fn specifications to tilt angle
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10?
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芯体直径
Unit Diameter (mm)
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25.4
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芯体高度
Unit Height (mm)
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33
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芯体质量
Unit Mass (g)
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87
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工作温度
Operating Temperature (℃)
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-40 — 90
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质保期
Warranty（year）
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1
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