1. Sensors(accelerometer)

　　1) Scheme one:

　　sensitivity: 1V/g;

　　Full Scale: ±2g;

　　frequency band: 0.8-40Hz(0-3dB);

　　resolution ratio:10-6g;

　　Dustproof and waterproof grade: IP67 levels of protection

　　2) Scheme two(recommend):

　　Sensitivity:3V/g;

　　Full Scale:±2g;

　　Frequency band: 0.25-80Hz(0-3dB);

　　Resolution ratio: 10-7g;

　　Dustproof and waterproof grade: IP67 levels of protection

　　2. Ports

　　Sensor port(4 slot), LAN port (1 slot), 220V Power supply (1 slot). USB port 2.0 (3 slot)

　　USB portsare used for external hard drive or other purposes.

　　Note: When transmitting data, network cable is not as good as coaxial cable because the transmission attenuation of the network cable is somewhat large. In our project, line length of some measuring points may be up to 100m or 200m. We highly recommendusing coaxial cable rather than network cable.

　　3. Monitor

　　1) 2TB Hard drive;

　　2)the Monitoring screenis touch panel;

　　3)Wall mounted installation for the Monitoring screen.

　　4. Software

　　1)English language for the software;

　　2) English language for the installation and configuration manual

　　3)Setpoint for the earthquake intensity(triggeringvalue)can be change on the software.

　　5. Data

　　1)Software can automatically determine whether all the hard disk is full (including external storage disk), if filled, then delete the first stored data;

　　6. Seismic event

　　1) UsingSTA / LTA (Short TimeAverage overLong Time Average) anti-triggeringalgorithmto monitor seismicevent monitoring, which willprevent false triggering caused bynon-seismic signal vibration;

　　2) Seismiceventcan be saved.

　　3) If seismic event happen, an alarm will be issued.

　　Alarm signal: low level(0V) when it is not triggered, and high level (24V) after it is triggered.

　　7. Diagram of connection

　　Sensor installation method