Seismometer CME-3211
The short-period seismometer CME-3211 is designed for portable applications as well as for permanent installations in locations with the background noise being higher than the Low Noise Model.
The seismometer is very rugged, does not require any maintenance or mass locking and centering. Its dynamic range is 108 dB at 1 Hz, maximum installation tilt is ±15°.
3-component and 1-component (vertical, horizontal) versions are available.
The CME-3211 frequency characteristic with poles and zeros presentation is available at the link on the website of Incorporated Research Institutions for Seismology (IRIS).
Characteristics Delivery and warranty
| Frequency range | 1 Гц - 50 Гц |
| Sensitivity | 2000 V / (m/sec) |
| Clip level | 5 mm/sec |
| Integral noise in passband | 15.8 nm/sec (31.5 µV) |
| Dynamic range | 108 dB at 1 Hz |
| Nonlinearity | 1% at 10 Hz |
| Sensitivity axes | 3 orthogonal 1 |
| Supply voltage | 12 V Nominal (10.5-16 V permissible) |
| Power consumption | 25 mA for 3-component version; 12 mA for 1-component version |
| Temperature range | -12°C - +55°C - standard range -40°C - +55°C - extended range |
| Maximum installation tilt | ±15° |
| Dimensions | 150 х 150 х 110 mm (3-component) / 120 х 120 х 110 mm (1-component) |
| Weight | 3 kg (3-component) / 1.6 kg (1-component) |
| Case material | Aluminum, waterproof |
| Output impedance | 1000 Ohm |
| Cross-axes sensitivity | -60 dB for 3-component version |
| Cold-start time | 10 - 30 min |
| Leveling, mass locking | none required |
| Case connectors | 10-pin RS-10 Russian type connector (for 1-component version) |
| Delivery set | 1.5 m open-ended cable (for 3-component version), 3 feet |
| Maximum output swing | ±10 Ohm |