Measurement Computing 6222 - Manual (Page 9)

6222 User’s Manual General Information 1-3
Connector Backshells and Ferrules
Connector backshells are optional protective casings that can be fitted onto the 6222 removable screw-terminal
connectors. The backshells provide a thermal shield to reduce the effect of short term ambient temperature changes,
and to ensure the accuracy of the cold junction measurement. They also provide mechanical relief and protection for
the TC wires and screw terminal connections.
Accuracy specifications are only valid when using provided connectors and properly installed backshells.
Terminating thermocouple wires with ferrules will also help maintain good connections in vibration applications,
but unless a backshell is used, there will be no protection to the screw-terminal connectors or to the wires at the
point of connection.
Each 6222 is shipped with three screw-terminal connectors and three backshells. Extra connector/backshell kits can
be ordered from the factory. Each kit contains one connector and one backshell.
Connector Backshell (2 views) Using a Ferrule