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INDUSTRIAL THERMOCOUPLES
General Installation Parameters
The thermocouple
should "see", as closely as possible, what the product
in the process is experiencing in order to get meaningful measurements.
- Location
- Locate
the thermocouple junction as close to the product as possible.
A rule of thumb is to have at least 10 tube diameters immersion
in the hot zone. Avoid direct flame impingement or stagnant
areas.
- Wire
Extension
- Select
the wire insulation that environmental conditions dictate.
See Section on General Wire
Insulation Characteristics
Use the correct thermocouple type throughout the circuit. "Red"
color code is always negative in thermocouple circuits. Ideally,
run thermocouple circuit wires in separate conduits at least
one foot away from power lines. Twisted and shielded constructions
may be required to avoid noise in the thermocouple circuit.
The overall impedance of the thermocouple circuit must be compatible
with your instrumentation.
For
more information regarding Industrial Thermocouples Please
consult your Marlin Catalog, Pages C-60 to C-79.
If
you do not have a Marlin Catalog - Click
Here!
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2003 Marlin Mfg. Corporation. All Rights Reserved.
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