Emerson ROC827 instruction manual Supported

ROC827 Instruction Manual

Note: Only ungrounded probes are supported. It is highly recommended that you use sheathed probes.

Use an ungrounded junction for measurements in corrosive environments where it is desirable to have the thermocouple electronically isolated from and shielded by the sheath. The welded wire thermocouple is physically insulated from the thermocouple sheath by MgO powder (soft).

At the tip of a grounded junction probe, the thermocouple wires physically attach to the inside of the probe wall. This results in good heat transfer from the outside, through the probe wall to the thermocouple junction. Grounded wiring is not supported.

The thermocouple in the exposed junction protrudes out of the tip of the sheath and is exposed to the surrounding environment. This type offers the best response time, but is limited in use to non-corrosive and non- pressurized applications. Exposed junction thermocouples are not

supported.

Note: Avoid subjecting the thermocouple connections and measurement instrument to sudden changes in temperature.

Issued Mar-06 Input/Output Modules 4-20