Instruction Manual
K SERIES Cryostorage System
IM: CryoCeK
Revision: 02
Approved by: CB
Page
71
of
87
Appendix D - SENSOR AND THERMOCOUPLE POSITIONING
Installation as well as all associated inspections should only be performed
by qualified persons:
These persons are qualified due to their special education and their practical
experiences, in particular with regard to the relevant legislation and standards, to
recognize the potential impact and hazards and to assess the necessary measures.
Sensor Positioning
The position of the sensors in the sensor tube determines the level of liquid nitrogen to be maintained.
Sensor position is determined by measuring the distance from the top of the sensor tube to the
bottom of the refrigerator, then subtracting the desired liquid level.
The result is used to position a split rubber bung on the sensor leads. When correctly installed, the
bung will position the sensors at the correct level when the sensor assembly is inserted into its tube.
The bung caps the tube and functions as a sensor retainer.
The lead with the single pod is the low level sensor assembly, consisting of the Extra Low and
Normal sensors.
The lead with two pods is the high level sensor assembly, consisting of the High and Extra High
sensors.
The Normal and High sensors must be separately positioned to set the liquid levels at which the
controller will start and terminate each fill cycle.
Determination of the liquid level to be maintained depends upon the application and the product being
stored, and is beyond the scope of this manual.
Position the sensors as shown in