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Environment and Site Survey Measurement
46
H157655_1_008
7.1.3
Measuring Floor Vibrations
Bruker offers a service for measuring floor vibrations using specialized hardware and
software. We recommend measurements to be done over a period of at least 1 hour (ideally
much longer) to try capturing both steady state conditions and transient events.
Furthermore, we recommend a measurement resolution of <= to 0.125 Hz, enabling the
collection of correct amplitudes in the low frequency range.
Also we recommend simultaneous measurements (multiple transducers) along the 3 axis
(vertical, 2 horizontal).
7.1.4
Bruker NMR Floor Vibration Guidelines
EMI damping system (Elastomeric Isolators)
Figure 7.2: Threshold Values of Floor Acceleration: Tolerance Level for EMI Dampers
Frequency
Maximum Velocity in
Vertical Direction
Maximum Velocity in
Horizontal Direction
1-10 Hz
1.6…0.64 µm/s
1.6…0.64 µm/s
10-20 Hz
0.64…6.4 µm/s
0.64…6.4 µms
>20 Hz
6.4 µm/s
6.4 µm/s
Table 7.2:
EMI Damping System (Elastomeric Isolators)
Summary of Contents for AVANCE
Page 6: ...Contents vi H157655_1_008 ...
Page 24: ...System Components 24 H157655_1_008 ...
Page 32: ...Magnet Access and Rigging 32 H157655_1_008 ...
Page 38: ...Ceiling Height Requirements 38 H157655_1_008 ...
Page 72: ...Utility Requirements 72 H157655_1_008 ...
Page 82: ...Floor Plan 82 H157655_1_008 ...
Page 96: ...CryoProbe and Other Accessories 96 H157655_1_008 ...
Page 102: ...Contact 102 H157655_1_008 ...
Page 104: ...List of Figures 104 H157655_1_008 ...
Page 109: ...H157655_1_008 109 ...
Page 110: ...Bruker Corporation info bruker com www bruker com Order No H157655 ...