CryoProbe and Other Accessories
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Ventilation Requriements
Free room volume (exchangeable
gas volume) V
free
= V
room
- V
furniture
>/= 70 m
3
.
Fresh air supply rate >/= 200 m
3
h
-1
. During LN2 refill: >/= 400 m
3
h
-1
Further local regulations may apply.
Table10.8: Prodigy System Ventilation Requirements
10.6 CryoFit
This section describes the requirements for the site planning for the CryoFit.
10.6.1 Introduction
A CryoFit converts a standard CryoProbe into a flow probe within a few minutes. The CryoFit
is a long metal pole with a flow cell. The flow cell is positioned inside the CryoFit during stor-
age and installation. The outlet capillary is attached to the flow cell and runs inside the metal-
pole to the top of the CryoFit. The inlet capillary is attached to the flow cell and is guide dur-
ing the installation procedure through the VT-air inlet of the probe to the outside.
CryoFits are compatible with all newer 5 mm He-cooled CryoProbes as well as Prodigy Cry-
oProbes.
The CryoFit is inserted from the top of the magnet into the upper part of the shim system
(BST Upper Part) is pushed into the magnet until the end of the CryoFit sits in the spinner tur-
bine. After this installation procedure the flow cell is pushed into the NMR probe so that is lo-
cated in the area of the NMR coils like a sample tube.
10.6.2 Installation Requirements
Two essential requirements have to be observed for the CryoFit.
1. The CryoFit must be long enough to that it fits into the BST and the flow cell can reach
the magnet center. This requirement is automatically checked during the order review.
– If a CryoFit is ordered as accessory for an already existing, older magnet the length
should be verified as the automatic conversion might not work properly.
– The automatically selected CryoFits are will be compatible with all types of sample
changers and included some security margin. In case a problem with the available
ceiling height –see (2) below–, you can verify if the smaller CryoFit fits the current in-
strument configuration, for example if no SampleChanger is included.
2. The CryoFit requires a minimum ceiling height so that the distance between BST upper
part and the ceiling allows the insertion of the CryoFit.
– The calculation of the required ceiling height depends on many parameters (type of
magnet, magnet feet, BST length, type of sample changer).
For the calculation of the magnet ceiling height (MCH) refer to the CryoFit Site Planning
Guide.
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