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Download Manual - Spectrum Controls, Inc.
Transcript
99 Appendix B: Using Grounded Junction, Ungrounded Junction, and Exposed Junction Thermocouples For grounded junction thermocouples it is recommended that they have protective sheathes made of electrically insulated material (e.g. ceramic), or the metal protective sheaths be floated. The metal sheaths would need to be floated with respect to any path to chassis ground or to another thermocouple metal sheath. This means the metal sheath must be insulated from electrically conductive process material, and have all connections to chassis ground broken. It should be noted that a floated sheath may result in a less noise immune thermocouple signal. 1756sc-IF8u Grounded junction with shielded cable MUXES + CH0 - + CH3 Metal sheath with electrical continuity to thermocouple signal wires.
