Fourtech Temperature Controller — Manual

To program your controller, you must input your sensor type and assign your desired temperature targets. Setting the Target Temperature (SV)

With the controller properly configured, Tom was able to monitor and adjust the temperature of his brew tanks remotely using the built-in RS485 communication port. He connected the controller to his computer and downloaded the Fourtech software, which allowed him to monitor the temperature of his tanks in real-time and receive alerts if the temperature went outside the set range.

This defines the "gap" where the unit turns back on. For example, a 37°C setpoint with a 3°C differential means the unit turns off at 37°C and restarts at 40°C (for cooling). fourtech temperature controller manual

Press the to change the flashing digit to your desired value.

Use a Solid State Relay (SSR) for precise PID control or a standard mechanical relay for simple ON-OFF tasks. 2. Front Panel Layout To program your controller, you must input your

If the unit gets much hotter than your SV, you may need to run the Auto-Tune (AT) function. This allows the controller to "learn" the thermal dynamics of your specific environment.

PID settings are poorly calibrated, or the controller is set to basic On/Off mode with a narrow hysteresis. This defines the "gap" where the unit turns back on

Adjusts how aggressively the controller approaches the set point. I (Integral Time): Corrects for long-term offsets.

Use specified compensation wires for Thermocouple (TC) inputs and insulated sensors for heated metals. For RTD inputs, use three wires of equal resistance to prevent measurement errors.

Check for loose terminal connections at Pins 3, 4, and 5. Look for broken sensor wires. If connections are solid, replace the thermocouple or RTD sensor. UUUU (Under-range Error)

If your system experiences a hardware fault, the upper display will show a distinct error message rather than a temperature value.