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51. ISEE Seismograph (+ Fre trigger filter)
ISEE Performance Specifications For Blasting Seismographs.
Level, frequency ranges:
10 in/s, 2-250 Hz
Max resolution in presentation: 0.002 in/s and 3 significant digits.
Threshold range 0.02 – 9 in/s.
Transient file resolution: ~0.0004 in/s.
52. ISEE Seismograph (+ Fre trigger filter)
I
SEE Performance Specifications For Blasting Seismographs.
Level, frequency ranges:
1 in/s, 2-250 Hz
Max resolution in presentation: 0.0002 in/s and 3 significant digits.
Threshold range 0.002 – 0.9 in/s.
Transient file resolution: ~0.00004 in/s.
53. Geophone
Unfiltered geophone signal. Upper frequency limit 500 Hz
Level, frequency ranges:
250 mm/s, 5-500 Hz
Max resolution in presentation: 0.05 mm/s and 3 significant digits.
Threshold range 0.4 – 220 mm/s.
Transient file resolution: ~0.01 mm/s.
55. ISEE/USBM (+ Frequency)
Based on the ISEE standard, but in SI units.
Level, frequency ranges:
250 mm/s, 2-250 Hz
Max resolution in presentation: 0.05 mm/s and 3 significant digits.
Threshold range 0.4 – 220 mm/s.
Transient file resolution: ~0.01 mm/s.
56. ISEE/USBM (+ Frequency)
Based on the ISEE standard, but in SI units.
Level, frequency ranges:
25 mm/s, 2-250 Hz
Max resolution in presentation: 0.005 mm/s and 3 significant digits.
Threshold range 0.04 – 22 mm/s.
Transient file resolution: ~0.001 mm/s.
