Bruker BioSpec 117 AVANCE III, Руководство пользователя

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Planning details
6.3.1 Design criteria of the exhaust system
The exhaust system must be designed and calculated in such a way that:
▪ The connection of the exhaust vent is immediately above the magnet's outlet point
▪ The maximum pressure drop along the line does not exceed 400 mbar
▪ A bursting pressure of at least 500 mbar is guaranteed.
▪ No magnetic materials are applied in the vicinity of the magnet
▪ The exhaust vent must be gas-proof within the building
▪ The first 15 m of the exhaust vent must be insulated with non-combustible thermal insulating
material at least 40 mm thick.
▪ horizontal vent routings provide a downgrade that prevents liquids running into the magnet
system
▪ The outlet into the open air is designed such that there is no risk to people in the event of a
quench within a radius of 3 m
▪ The outlet into the open air prevents penetration by animals and/or water
If parts of the exhaust vent are electrically grounded on the building side, a galvanic insulation
must be used between the external grounding point and the connection point on the magnet.
The galvanic insulation must be located as close as possible to the magnet. In the event of in-
stallation in a HF shielded room, galvanic insulation must located immediately after the duct
through the Faraday cage.
L-Maß: 94/30, 117/16
Schematic diagram of the exhaust vent supplied. The distance Q is measured from the center of the dewar vessel of the magnet.
Figure 6.9: Schematic diagram of the exhaust vent supplied. The distance Q is measured from the center
of the dewar vessel of the magnet.
The galvanic insulation must be installed in each case to avoid ground loops or HF couplings.