Taylor-Wharton CS Series - Manual (Page 17)

15
CS SERIES
Temperature Monitoring
The CS SERIES Control System uses a type T thermocouple to monitor the
temperature in the vessel. The thermocouple is factory-installed near the top of
the Taylor-Wharton Cryostorage freezer vapor chamber and the temperatures are
measured at that point.
The CS SERIES Control System accommodates a second user-installed thermocouple
for temperature measurement at a secondary location. This is also a Type T
thermocouple.
The control provides a High Temperature Alarm for each thermocouple which can
be selected by the user. If the temperature exceeds the temperature alarm set point,
the status wheel flashes and an audible alarm is triggered.
Liquid Phase Storage
Liquid phase storage is normally utilized when -196 is required to maintain stored
product viability and the storage medium is adequate for storage in liquid nitrogen.
In a typical liquid phase storage system, the liquid level sensors are positioned to
maintain the liquid level at or below the top level of the inventory control system.
During operation, the upper levels of the inventory control system will at times
become exposed as the liquid level fluctuates.
Care must be taken to ensure that the liquid level remains below the bottom of the
refrigerator lid. Exposure to liquid nitrogen may result in physical damage to the lid.
Additionally, operating the refrigerator with high liquid levels characteristic of liquid
phase storage may result in turbulence during fill cycles. Caution must be exercised
if the refrigerator lid is opened during a fill, and appropriate safety equipment
should always be worn.
The Taylor-Wharton Cryostorage Systems are set at factory for vapor phase storage.
Maintenance
To insure proper operation and maintain excellent performance of the Taylor-
Wharton Cryostorage freezer, an annual maintenance schedule should be followed
for the CS SERIES Control System. This would include the following:
Table 3.0 Annual Maintenance Schedule
CS SERIES Control
System
Examine for exposure to moisture, wear and tear,
connector problems, and cracks or other damages
to the faceplate or buttons. In addition, periodic
firmware updates may be important.
Harness Assembly Examine for damage to the cable and damage to
connectors.
Battery Examine connection cable and connector for
damage.Examine vinyl cover for damage.
Replace every 2 years.
Solenoid Valve Examine wires and connector for damage.
Replace every 3 years.
Lid Switch Examine lid switch pickup and wires for damage.
Replace if necessary.
Level Sensor Assembly Examine for damage to wires and connector.
Thermocouple Assembly Examine for damage to wires and connector.
Power Supply Examine for damage to power supply and power
cords.