7.
Operation
This section of the manual will detail the functions and features of the TEC 3000 and demonstrate how to
access and adjust the various user settings and options.
All MVE Freezers utilize LN2 as the means of refrigeration. Under atmospheric conditions, the
temperature of LN2 is -196°C (-320°F, 77 K). Depending on the model, the LN2 resides either in or below
the freezer storage space. Through normal usage and time, the LN2 will naturally boil off reducing the
amount of refrigerant in the freezer. It is imperative that the LN2 level be properly maintained in order for
the storage space temperature to be maintained. This, along with monitoring and recording temperature,
is the main function of the TEC 3000.
Figure 3: Illustration showing LN2 as the refrigerant. Left: LN2 below the storage space
naturally boils off and cools the freezer. Right: LN2 resides in the freezer storage space.
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