Page 26
APPENDIX A
SENSOR POSITIONING
The position of the sensors in the sensor tube determines the level of Liquid Nitrogen to be maintained.
The longest lead with a single sensor pod is the low level sensor assembly. The upper bead in the pod is the
Low sensor and the lower bead is the Extra Low Sensor.
The lead with two pods is the high level sensor assembly, consisting of the High and Extra High Sensors.
The Low and High sensors must be separately positioned to set the liquid levels at which the controller will start
and terminate each fill cycle. The position of the High sensor determines the maximum depth of liquid in the
vessel.
The thermocouple is normally set to sense the temperature under the lid but may be positioned anywhere in the
refrigerator within the limits of its length.
Determination of the liquid level to be maintained and positioning of the thermocouple depends on the
application and the product being stored, and is beyond the scope of this manual.
A-1
To Next Page
Loading...