Section B.3 Using An Exposed Junction Thermocouple - Spectrum Controls 1769 Series User Manual

6 channel isolated thermocouple/mv input module

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Section B.3

Using an Exposed

Junction

Thermocouple

User's Manual Pub. 0300244-01 Rev. A

Appendix B: Using Thermocouple Junctions

An exposed junction thermocouple uses a measuring junction that does not have a

protective metal sheath. A thermocouple with this junction type provides the fastest

response time but leaves thermocouple wires unprotected against corrosive or mechanical

damage.

As shown in the next illustration, using an exposed junction thermocouple can result in

removal of channel-to-channel isolation. Isolation is removed if multiple exposed

thermocouples are in direct contact with electrically conductive process material.

B-3

1769sc-IT6I

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