The Etna is a cost-effective Strong Motion Accelerograph designed to meet a wide range of earthquake monitoring applications. Based on Kinemetrics' Altus technology, the Etna provides superior resolution to meet customer needs in high dynamic range applications, where signal fidelity and data integrity are vital.
The Etna was designed to be easy on your budget while still providing those features most requested by end-users. The standard instrument comes equipped with 3 channels, an internal triaxial EpiSensor Force Balance Accelerometer and a PCMCIA memory card. In additiokn, the Etna offers several optional features including: PCMCIA storage & communications, networking and GPS timing.
Developed for Microsoft Windows, our QuickTalk® and QuickLook® software provides a user-friendly environment, making system setup, communications and rapid data analysis quick and easy. We also offer a library of DOS support programs for users who wish to customize communications with Kinemetrics' Altus instruments. With the Etna, you are assured of not only getting high quality, cost-effective instrumentation, but also of receiving Kinemetrics' commitment to the success of your projects for decades to come.
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18 bits of resolution with 108 dB dynamic range |
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Cost-effective solution that can satisfy today's most demanding applications
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Multitasking operating system that allows simultaneous data acquisition and interrogation |
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Timing accuracy to 0.5 milliseconds due to synchronized sampling with optional GPS timing system |
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Remote alerting capability for system event or auto-diagnostic failure |
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File format compatible with other products in the Altus series of instruments |
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Structural monitoring arrays |
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Dense arrays: 2 and 3 dimensional |
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Aftershock study arrays |
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Regional arrays |
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Type:
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Over sampled delta sigma system with 24-bit digital signal processor |
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Number of channels:
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Three channels (standard) |
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Dynamic range:
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108 dB @ 200 sps |
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Frequency response:
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DC to 80 Hz @ 200 sps |
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Resolution:
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18-bit resolution @ 200 sps |
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Noise:
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< 8 µV RMS |
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Sampling rate:
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100, 200, 250 sps |
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Input range:
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+/- 2.5V |
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Chan/chan skew:
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None – simultaneous sampling of all channels |
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Anti-alias filter:
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Brickwall FIR filter. Cut-off at 80% of output Nyquist. 120 dB down at output Nyquist. |
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Real time digital output:
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RS-232 output of digital stream |
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Calibration type:
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Kinemetrics test sequence |
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Type:
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Triaxial EpiSensor force balance accelerometer, orthogonally oriented, internal (standard), external (optional) |
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Full scale range:
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2g (standard); 4g, 1g, 0.5g (optional) |
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Bandwidth:
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DC to 200 Hz |
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Dynamic Range:
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155 dB+ |
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Calibration and test:
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Calibration Coil Functional Test |
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Type:
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IIR Bandpass filter |
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Trigger bandwidth:
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0.1 Hz-12.5 Hz |
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Channel triggering; trigger, de-trigger:
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Independent threshold for all channels |
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Alarm thresholds:
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Selectable from 0.01% to 100% of full scale |
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Trigger voting:
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Internal, external trigger votes with arithmetic combination |
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Pre-event memory:
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60 second maximum for 3 channels @ 200 sps. Software selectable in one-second increments. |
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Post-event time:
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Software selectable, specified in seconds, 0 to 65,000 seconds |
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Type:
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Two fully compliant PCMCIA storage slots available. |
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Compatibility:
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PCMCIA standard 2.1. Sockets accept Type I, II, III card formats. |
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Type I or II modem with connections. |
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Primary slot:
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16 MB Memory Card (minimum). Consult factory for optional memory cards and hard disks. |
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Secondary slot:
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Same options as primary slot for storage media. Accepts Type I or II modem with connectors. |
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Recording capacity:
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Approximately 8 minutes per MB on Memory Card, 3 channels of 24-bit data @ 200 sps. |
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Recording format:
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Data is stored in DOS file system that allows cards to be read directly by PC. |
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Type:
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Multi-tasking operating system supports simultaneous acquisition and interrogation. Boot loader allows remote firmware upgrades. |
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System control:
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Configure sample rate, filter type, trigger type and voting, maintains communications and event storage. |
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User interface:
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Packetized protocol and simple terminal loop control and data retrieval, via RS-232 interface. |
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Intelligent alerting:
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Can initiate communications when an event is detected or if an auto-diagnostic failure occurs. |
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Auto-diagnostics:
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System can be configured to continuously check system voltages, temperature, RAM and code integrity and timing system integrity. |
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Type:
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Free running disciplined oscillator (standard); GPS (optional) |
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GPS (optional):
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Integrates completely with system, providing timing, internal oscillator correction and position information. |
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Timing Accuracy:
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5 microseconds of UTC. GPS receiver better than 1 millisecond data synchronization to UTC. Power cycling is software controlled. |
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Power consumption:
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110mA at 12V (active) |
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Type:
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I/O Connectors, EMI/RFI and transient protection, I/O drivers and display are provided on a single front panel board. |
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Display:
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3 LEDs. Display indicates: Run/Fault, charge, event |
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Power input:
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Military-style connector for charge input and external battery |
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RS-232 interface:
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Full RS-232C interface with modem control |
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Interconnect input (optional):
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Military-style connector for IRIG out, IRIG in, Clock sync., 1 pps out, trigger in, trigger out, alarm out, real time digital output (Tx and Rx), external 12V out, Relay 1. |
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EMI/RMI protection:
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All I/O lines are protected from both EMI/RFI emission and susceptibility problems by ferrite filters and transient suppressors. |
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Supplied external charger voltage:
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100-250 Vac 50/60 Hz |
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Charging voltages:
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14.9V @ fast charge, 13.8V @ float charge. Temperature compensated for sealed lead acid, gel type batteries |
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Battery operating range:
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11V to 15V |
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Batteries:
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Internal 12V, 6.5 Ah battery (standard), 12V, 12Ah battery (opt.), External battery (opt.) |
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Current drain:
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185 mA @ 12V |
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Power autonomy:
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>36 hours (standard), >72 hours with optional internal 12Ah battery |
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Type:
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Lexan structural foam housing internally coated with EMI/RFI shielding material, 5/16" aluminum base support for mounting and coupling to sensors. |
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Mounting and leveling:
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Single hole for 1/4" stud and three adjustable feet for leveling |
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Size:
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10.1" (256mm) W x 15" (381mm) L x 7" (178mm) H |
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Weight:
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20 lbs. (9 Kg) including battery |
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Type:
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Microsoft Windows compatible control and retrieval programs -- QuickTalk® and QuickLook® for Windows. Also operates with DOS communication software. |
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QuickTalk & QuickLook:
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Allows easy instrument setup and data retrieval by direct connection or modem at up to 57,600 Baud. Includes on-line Windows help manual. Allows rapid viewing of data and will generate output to any Windows compatible device. |
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Format converters:
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Provides option to convert and store data in ASCII and other formats. Contact factory for other formats. |
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Operating temp:
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-20 C to 70 C |
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Humidity:
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0-100% RH |