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Seismometer
Real-time 4.5 Hz Seismometer Viewer
Recent Alaska earthquakes
~ Alaska Earthquake Information Center
Infiltec Seismometers QM-4.5 basic
characteristics:
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Input amplifier: Analog Devices AD8628A
-
Filter: Maxim MAX7401CPA, lowpass
Bessel
-
Mixed signal microprocessor: Microchip
PIC14000
-
Analog-digital converter: 16-bit
-
Sample rate: Adjustable in steps 6 to 33 Hz
-
Interface: EIA-232 (9600 b/s, 8N1)
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Power: Nominal 12 Vdc at approximately 10 mA
-
Dimensions: 121 mm long x 66 mm wide x 36 mm high
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Sensor:
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Manufacturer: Mark Products 4.5 Hz geophone,
model L15B (see specifications below)
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Frequency range: 4.5 to 10 Hz
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Orientation: Vertical (Z-component)
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Location: Collocated with electronics
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Software: AmaSeis v3.2
![](QM4.5_Seismometer_IMG_3439_crop_resize.JPG)
Photo above shows the QM4.5. The circuit board is at
top and the geophone is at center. The power and serial port connections are at
right. The photo below shows a magnified AD8628A amplifier.
![](AD8628A_Still_2013-03-27_155149_60X_N0002_resize.bmp)
L15B geophone specifications:
![](L15B-specifications.gif)
Infiltec Seismometers QM-1.0 basic
characteristics:
-
Input amplifier: Analog Devices AD8628A
-
Filter: Maxim MAX7401CPA, lowpass
Bessel
-
Mixed signal microprocessor: Microchip
PIC14000
-
Analog-digital converter: 16-bit
-
Sample rate: Adjustable in steps 6 to 33 Hz
-
Interface: EIA-232 (9600 b/s, 8N1)
-
Power: Nominal 12 Vdc at approximately 10 mA
-
Dimensions: 121 mm long x 66 mm wide x 36 mm high
-
Sensor:
-
Manufacturer: TBD
-
Frequency range: TBD
-
Orientation: TBD
-
Location: TBD
-
Software: AmaSeis v3.2
Links:
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