DescriptionCDJ Series Digital Seismic Sensor (Geophone) are available frequencies from 1Hz to 100Hz vertical and horizontal direction, and geophone-consisted three-component geophones, borehole geophone, tomographic imaging geophone series with stable performance, high fidelity and consistent quality in oil, gas exploration and other fields.
|
Applications and Features 1~3Hz geophones applied for deep seismic prospecting, natural earthquake surveillance and prediction, pulse and microseismic measurement for bridge and highways, etc. 4~100 Hz widely used to seismic prospecting of petroleum, coal, metallurgy, defense engineering and etc. High sensitivity, low-distortion, reasonable damping coefficient, good linear response, good parameter conformity, higher resolution and excellent waterproof property. Small-sized, easy to install, easy to operate, large ambient temperature range, can meet the demand of multi-wave component seismic data acquisition technology
|
Technical Specifications ((20℃)
Table 1 |
Medium–High Frequency (vertical and horizontal) Geophones | Parameter\type name | CDJ-Z/P4 | CDJZ/P4.5 | CDJ-Z/P10 | CDJ-Z/P15 | CDJ—Z/P28 | CDJ-Z/P30 | CDJ—Z/P38 | | Natural Frequency (Hz) | 4±10% | 4.5±10% | 10±5% | 15±5% | 28±5% | 30±5% | 38±5% | Sensitivity G
(v/cm.s-1) | 0.28±5% | 0.26±5% | | Coil Resistance Rc(Ω) | 365±5% | 365±5% | 365±5% | 500±5% | 500±5% | 650±5% | Internal Resistance
(Ω) | 345±5% | 335±5% | 310±5% | 415±5% | 415±5% | 560±5% | | Damping Coefficient Bt | 0.7±10% | 0.58±10% | 0.58±10% | 0.62±10% | 0.6±10% | 0.6±10% | | Harmonic Distortion D | ≤ 0.2 | Insulating Resistance
Ri (MΩ) | ≥ 20 | | Coil'S Maximum Displacement P-P(mm) | 2 | | Suspension Mass( g ) | 13.2 | 12.8 | 8.6 | 7.9 | Working Temperature
(℃) | — 40 ～ ＋ 70 | Weight ( g ) | 255 |
|
Table 2
Medium–High Frequency (vertical and horizontal) Geophones | Parameter\type name | CDJ-Z/P40
| CDJ-Z/P60
| CDJ—Z/P80 | CDJ—Z/P100 | | Natural Frequency (Hz) | 40±5% | 60±5% | 80±5% | 100±5% | Sensitivity G
(v/cm.s-1) | 0.26 ±5% | 0.3 ±5% | 0.25 ±5% | 0.25 ±5% | | Coil Resistance Rc(Ω) | 690±5% | 1030 ±5% | 735 ±5% | 1080 ±5% | Internal Resistance
(Ω) | 580 ±5% | 800 ±5% | 685 ±5% | 1020 ±5% | | Damping Coefficient Bt | 0.6 ±10% | 0.6 ±10% | 0.55 ±10% | 0.5 ±10% | | Harmonic Distortion D | ≤ 0.2 | Insulating Resistance
Ri (MΩ) | ≥ 20 | | Coil'S Maximum Displacement P-P(mm) | 2 | | Suspension Mass( g ) | 7.9 | 5.9 | 5.5 | 5.2 | Working Temperature
(℃) | — 40 ～ ＋ 70 | Weight ( g ) | 255 |
|
Table 3 Low-Frequency (vertical, horizontal and three-component ) Geophones | Parameter\type name | CDJ-Z1/P1/S1
| CDJ-Z1A/P1A/S1A
| Natural Frequency (Hz)
| 1±10% | Coil Resistance Rc(Ω)
| 3400±10% | 3500±10% | Open Circuit Sensitivity
G (v/cm/s) | 2±10% | 6.7±10% | Closed Circuit Sensitivity
(v/cm/s) | 1.83±10%
| 6.4±10%
| Internal Resistance R(Ω)
| 3100±10% | 3300±10% | Open Circuit Damping Coefficient Bt
| 0.32±10% | Closed Circuit amping Coefficient
| 0.43±10%
| Insulating Resistance
Ri (MΩ) | ≥ 10 | Coil'S Maximum Displacement P-P (mm) | 6 | Suspension Mass ( g ) | 770 | Working Temperature (℃) | —25 ～ ＋55 | Weight (K g ) | 8.15 | 3.4 | 10 | 8.15 | 3.4 | 10 |
|
|
Table 4 Low-Frequency (vertical, horizontal and three-component ) Geophones | Parameter\type name | CDJ—Z2A/P2A/S2A
| CDJ-Z2B/P2B/S2B
| CDJ-Z2C/P2C/S2S
| | Natural Frequency (Hz) | 2±10% | Sensitivity G
(v/cm.s-1) | 1.2±10% | 3.5±10%% | 2±10% | Coil Resistance Rc(Ω) | 1600±5% | 13000±5% | 6040±5% | Internal Resistance
(Ω) | 1540±5% | 12800±5% | 5800±5% | Damping Coefficient Bt | 0.7±10% | Harmonic Distortion D | ≤ 0.2 | Insulating Resistance
Ri (MΩ) | ≥ 20 | Coil'S Maximum Displacement P-P(mm) | 3 | Suspension Mass( g ) | 60 | Working Temperature
(℃) | —25 ～ ＋55 | | Geophone Element Weight (K g ) | 0.25 |
Table 5 Low-Frequency (vertical, horizontal and three-component ) Geophones | Parameter\type name | CDJ—Z2.5A/P2.5A/S2.5A
| CDJ-Z2.5B/P2.5B/S2.5C
| CDJ-Z2.5C/P2.5C/S2.5S
| | Natural Frequency (Hz) | 2.5±10% | Sensitivity G
(v/cm.s-1) | 1.2±10% | 3.5±10% | 2±10% | Coil Resistance Rc(Ω) | 1600±5% | 13000±5% | 6040±5% | Internal Resistance
(Ω) | 1540±5% | 12800±5% | 5650±5% | Damping Coefficient Bt | 0.7±10% | Harmonic Distortion D | ≤ 0.2 | Insulating Resistance
Ri (MΩ) | ≥ 20 | Coil'S Maximum Displacement P-P(mm) | 3 | Suspension Mass( g ) | 60 | Working Temperature
(℃) | —25 ～ ＋55 | Geophone Element Weight (K g ) | 0.25 |
Table 6 Low-Frequency (vertical, horizontal and three-component ) Geophones | Parameter\type name | CDJ—Z3A/P3A/S3A
| CDJ-Z3B/P3B/S3B
| CDJ-Z3C/P3C/S3S
| | Natural Frequency (Hz) | 3±10% | Sensitivity G
(v/cm.s-1) | 1.2±10% | 3.5±10% | 3±10% | Coil Resistance Rc(Ω) | 1600±5% | 13000±5% | 6040±5% | Internal Resistance
(Ω) | 1540±5% | 12800±5% | 5650±5% | Damping Coefficient Bt | 0.7±10% | Harmonic Distortion D | ≤ 0.2 | Insulating Resistance
Ri (MΩ) | ≥ 20 | Coil'S Maximum Displacement P-P(mm) | 3 | Suspension Mass( g ) | 60 | Working Temperature
(℃) | —25 ～ ＋55 | Geophone Element Weight (K g ) | 0.25 |
|
