Section 307.43. Instrumentation.

Latest version.

All seismographs used to determine compliance with this subchapter shall meet the following minimum specifications:

(1) Seismic frequency range: 2 to 200 Hz ( ± 3 Hz).

(2) Acoustic frequency range: 2 to 200 Hz ( ± 1 Hz).

(3) Velocity range: 0.02 to 4.0 inches/second.

(4) Sound range: 110 to 140 dB linear.

(5) Transducers: Three mutually perpendicular axes.

(6) Recording: Provide time-history of waveform.

(7) Calibration: Be laboratory calibrated as often as necessary, but at least once every 12 months according to manufacturer's recommendations.

CR 06-120 : cr. Register February 2008 No. 626 , eff. 3-1-08.

Note

Due to an error in CR 06-120 , dB was changed to Hz in sub. (2). Microsoft Windows NT 6.1.7601 Service Pack 1

                    
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