If your system is overshooting or taking too long to heat, you need auto-tune. Locate the parameter AT or TUN . Change its value from 0 to 1. Exit the menu. The controller will now cycle your heater on and off, calculating the ideal PID values. This takes 2-10 cycles. Wait until the AT indicator light turns off.
Press and hold the key to enter the internal parameter menu. Navigate until you see the parameter "AT" . Change the value from 0 to 1 (or on ).
For a standard Thermocouple, Terminals 9 (+) and 10 (-). For a PT100, you will typically use three terminals (8, 9, and 10). Control Output: Relay: Terminals 3 and 4 act as a dry contact switch. fourtech temperature controller manual free
While many PID (Proportional-Integral-Derivative) controllers look similar, the vary wildly between brands. Using a generic manual for a Fourtech device can lead to:
The Fourtech Temperature Controller is a microprocessor-based digital controller designed for precise temperature measurement, display, and control. It is widely used in plastic machinery, packaging equipment, food processing, and chemical engineering. If your system is overshooting or taking too
Used for driving heavy loads directly or through an external contactor.
💡 : In some systems, the clock only maintains its setting while the device has power. After a power outage, you may need to reset it. If your model lacks a clock, you can skip this step. Exit the menu
If your Fourtech controller encounters a problem, it will display an error code instead of the Process Value (PV).
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