Contents
iv H157655_1_008
6.2 Vertical Stray Fields ..........................................................................................................41
6.3 Stray Field Plots................................................................................................................42
7 Environment and Site Survey Measurement .................................................................................43
7.1 Vibrations ..........................................................................................................................43
7.1.1 Integrated Isolator Options................................................................................................44
7.1.2 General Vibration Guidelines ............................................................................................44
7.1.3 Measuring Floor Vibrations ...............................................................................................46
7.1.4 Bruker NMR Floor Vibration Guidelines............................................................................46
7.1.5 Floor Vibration Guidelines: Bruker Nano-C and Nano-D ..................................................48
7.1.6 Floor Vibration Guidelines: Bruker Nano-C API Damping System ...................................49
7.2 Magnetic Environment ......................................................................................................51
7.2.1 Guidelines for Static Objects.............................................................................................51
7.2.2 Guidelines for Moving Objects ..........................................................................................51
7.3 Electromagnetic Interference ............................................................................................52
7.3.1 Types of EMF Interference ...............................................................................................52
7.3.2 DC EMF Interference ........................................................................................................52
7.3.2.1 Measuring DC Fluctuating Fields......................................................................................53
7.3.2.2 Guidelines for DC Interference .........................................................................................53
7.3.2.3 Reducing DC Interference ................................................................................................53
7.3.3 AC EMF Interference ........................................................................................................54
7.3.3.1 Measuring AC EMF Interferences.....................................................................................54
7.3.3.2 Guidelines for AC EMF Interference .................................................................................54
7.3.3.3 Reducing AC EMF Interference ........................................................................................55
7.3.4 HF Interference .................................................................................................................55
7.3.4.1 Measuring HF Fluctuating Fields ......................................................................................55
7.3.4.2 Most Commonly Studied Nuclei........................................................................................56
7.3.4.3 Guidelines for HF Interference..........................................................................................56
7.3.4.4 Reducing HF Interference.................................................................................................56
8 Utility Requirements.........................................................................................................................57
8.1 Electrical Power Requirements.........................................................................................57
8.2 Telecommunication...........................................................................................................59
8.3 Compressed Gas ..............................................................................................................59
8.3.1 General Requirements......................................................................................................59
8.3.2 Gas Supply .......................................................................................................................59
8.3.3 Other Specifications..........................................................................................................60
8.3.4 Compressed Air System ...................................................................................................61
8.3.4.1 Air Compressors ...............................................................................................................62
8.3.4.2 Dryers ...............................................................................................................................63
8.3.4.3 Filters ................................................................................................................................64
8.4 Cooling Water ...................................................................................................................64
8.5 Lighting .............................................................................................................................65
8.6 HVAC (Heating Ventilation Air Conditioning) ....................................................................65
8.6.1 Heat Dissipation into the Room ........................................................................................67
8.6.2 System Stability ................................................................................................................67
8.7 Emergency Ventilation During Installation and Quenches................................................68
8.7.1 Emergency Exhaust Solutions ..........................................................................................69
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