Chapter 9. Appendix B - Sensor Specifications
Hybrid sensors | Velocity output bandwidth | 0.1 – 50 Hz |
HPF output flat to acceleration | 100 seconds - spec* | |
HPF output flat to velocity | spec – 50 Hz* | |
Mass position output | DC – 0.1 Hz | |
Velocity sensitivity | 1400 V/ms-1 | |
Acceleration sensitivity | 2000 V/ms-2 | |
Velocity sensors | Velocity output bandwidth | spec – 50 Hz* |
Mass position output | DC to spec Hz* | |
Velocity sensitivity | 2 × 750 V/ms-1 | |
Mass position sensitivity | 1000 V/ms-2 | |
Controls | Mass locking and unlocking | Remotely operated |
Mass centring | Manual and/or automatic | |
Mechanics and electronics | Sensors | 3 orthogonal sensors, each 0.180 kg |
Lowest spurious resonance | above 140 Hz | |
Sensor transducer type | capacitive displacement | |
Feedback transducer type | magnet/coil | |
Connector | pressure tight | |
Temperature range with masses locked | –35 to +75 °C | |
Operational temperature range | –20 to +65 °C** | |
Power | Supply voltage | 10 – 36 V |
Current at 12 V DC | 75 mA† | |
... during calibration | 100 mA† | |
... during centring (average) | 330 mA† | |
... during locking/unlocking | 490 mA† |
* spec refers to the quoted frequency response value, e.g., for a “30 s” sensor, the value of spec would be 30 s = 0.033 Hz.
** Temperatures below –20 °C may be accommodated with additional care. Please consult Güralp Systems for advice.
† Because centring, locking, and unlocking consume varying amounts of power, it is recommended that you use a power supply capable of delivering 1 A at 12 V.