Broadband Low-noise Three-component Close-Loop Seismometer CME-6211
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• 130 dB dynamic range
• 0.016 – 40 Hz frequncy range
• Self-noise below NLNM in 15 sec – 1 Hz frequency range
• Buld-in calibrator
• Well suited for field experiments
• Compact and rugged
In 6211 Model low-noise molecular-electronic sensor is combined with an electro-dynamical feedback mechanism. This approach results in very flat response over wide frequency range, high dynamic range and greater time and temperature stability of the instrument parameters. Like other molecular-electronic instruments, the 6211 seismometer is very rugged and does not require any special means or procedures for transportation and installation. The only procedure to start the operation is to place the seismometer on the rigid horizontal surface, turn the power on and wait for several minutes. The seismometer can be used in various areas including permanent stations and field experiments.
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TECHNICAL SPECIFICATIONS
| Transducer Type: |
Molecular electronic (MET) with electro-hydrodynamic feedback |
| Standard bandwidth |
60 sec - 40 Hz |
| Standard gain: |
2000 V·sec/m |
| Standard Output: |
± 20 V differential output |
| Clip Level: |
± 10 mm/sec (standard gain) |
| Noise & Dynamic Range: |
See noise curve below |
| Mass Lock or Centering: |
Not required |
| Mechanical Resonances: |
None |
| Maximum Installation Tilt |
± 15° |
| Standard Temperature Range: |
-12 .. +55 °C |
| Extended Temperature Range: |
-40 .. +55 °C (option) |
| Standard Power: |
12 V DC / 50 mA |
| Case Diameter: |
270 mm |
| Case Height: |
190 mm |
| Weight: |
7.5 kg |
CME-6211 noise levels vs. USGS Low Noise Models
