Low-noise force-balance broadband seismometer CME-6111
The three-component low-noise force-balance broadband seismometers CME-6111 combine the low-noise molecular-electronic sensing element (transducer) and the electrodynamic feedback. That all results in a very flat response over a wide frequency range, high dynamic range and greatly improved time and temperature stability of the instrument parameters.
Like other molecular-electronic instruments, the CME-6111 model is very rugged and does not require any special means or procedures for transportation and installation. The only procedure to start its operation is to place the seismometer on a rigid horizontal surface, turn it on and wait for several minutes.
The seismometer can be used in various areas including permanent stations and field research.
The CME-6111 frequency characteristic with the 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 | 0.016 Hz (60 sec) - 50 Hz |
| Sensitivity | 2000 V/(m/sec) |
| Clip level | ±20 V (10 mm/sec) or ±15 V (7.5 mm/sec) |
| Self noise at 1 Hz | 1.4 nm/sec |
| Dynamic range | 134 dB |
| Nonlinearity | 0.2 % |
| Sensitivity axes | Vertical, North, East |
| Supply voltage | 12 V Nominal (10.5 - 16 V permissible) |
| Power consumption | 700 mW 30 mA (Low power) |
| Temperature range | -40...+55°C |
| Maximum installation tilt | ±15° |
| Output impedance | 1000 Ohm |
| Cold-start time | 10 - 30 min |
| Leveling, mass locking | none required |
| Case connectors | Amphenol MS3102E (14 pins) |
| Delivery set | 1.5 meter cable, bubble level, handle, three leveling feet, protective cap for connector |
| Case material | Stainless steel, aluminum |
| Dimensions | 204 x 210 mm (dimensions including handle, diameter x height) |
| Weight | 7.5 kg |