Bruker BioSpec 70/30 USR V2, Руководство пользователя

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Planning Details
64 Site Planning Information BioSpec 70/30 USR_2_V020
6.6 Supervision signals
The operation state of the magnet can be remotely supervised using the remote alarm
connection of the magnet monitoring unit (BMU). The connection to a remote supervising and
alarm system of the building is done via a male 4 pin Amphenol connector of type C091A 4M.
The BMU provides two different alarm signal types with the following potential free pin
assignment:
Alarm type Pin Alarm states
Normally
closed Pin 1 and 2 Contact closed in normal operating state, open during
alarm
Normally open Pin 3 and 4 Contact open in normal operating state, closed during
alarm
It is the responsibility of the system owner to decide on the usage of this feature and to
realize the connection between the BMU and the central alarm system of the building.
6.7 Cable lengths and routing
All connections between the cabinets in the technical room and the MR system in the magnet
room and/or in the operating area are made via the external cable set. The external cable set
contains electricity cables, lines for cryogenic gases, and refrigeration lines.
Detailed planning of cable lengths and compliance to these plans during the final installation
is a basic prerequisite for smooth installation of an MR system.
The local project leader must immediately notify Bruker BioSpin MRI of any change to the
cable lengths required during the planning stage. Changes to construction of the installation,
which only become known during installation of the system, lead to enormous time delays.
The relocation of the external line set is subject to specifications relating to:
• Compliance with the maximum cable lengths between components in the technical room
and the magnet cabinet (CCM) as well as the operating area.
• Compliance with the minimum bending radii of the different cables
• Cable routing with strain relief on cable trays at ceiling height
Cable routing with minimum distances is an advantage and should be strived for in every
case. The available RF power for MR signal excitation compared to the nominal output power
of the RF transmitter is reduced when long distances are used. Other than this, no further
constraints should be expected. The lengths of the cryogenic transfer line between the cryo-
platform and the MR CryoProbe™ has a strong influence on the signal to noise ratio of the
CryoProbe and must be minimized in every case by direct line routes. See chapter
Additional
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