Common Mistakes
Avoid these frequent errors to ensure accurate temperature measurement and protect your equipment.
The Problem
Using the wrong wire type or mixing different thermocouple alloys creates incorrect voltage readings.
The Solution
Always use matched thermocouple wire. Type K must use Type K wire throughout the entire circuit.
The Problem
Connecting extension wires backwards sends the signal in reverse (reading goes down as temp goes up).
The Solution
Red is always negative in ANSI thermocouple wire. Ensure positive connects to positive.
The Problem
Substituting regular copper wire for extension wire creates unwanted junctions and errors.
The Solution
Never use standard copper wire. Only use thermocouple extension wire of the correct calibration.
The Problem
Excessive wire length without proper gauge causes voltage drop and signal degradation.
The Solution
Use larger gauge wire for long runs, or use a 4-20mA transmitter for distances over 100ft.
The Problem
Loose connections or bad welds create unstable, noisy readings.
The Solution
Ensure clean, tight connections. Use proper thermocouple connectors and plugs.
The Problem
Using a thermocouple outside its rated temperature range leads to failure.
The Solution
Check the temperature range of your application against the thermocouple specifications.
Still Having Issues?
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