What are the calibration steps for a hot runner temperature monitoring system?

Following the prior focus on tool preparation and rapid calibration solutions for hot runner temperature monitoring systems, the typical calibration procedures are:

Preparation: Power down, secure all sensor terminals, and ensure sensor probes are touching hot runner temperature measurement surface. Prepare your tools like the handheld thermometer and multimeter which are calibrated in a metrological way.

Hardware Troubleshooting: Use a multimeter to examine the sensor continuity and wiring resistance. Hardware issues such as broken wires and poor contact might affect calibration results.

PID Self-Tuning Power on and turn on the PID self-tuning feature of the temperature control system, which can automatically adapt to the heating inertia of the hot runner, eliminate temperature overshoot and steady-state variations.

Point Comparison Calibration: Hot runner temperature stabilized, use standard handheld thermometer to compare the real temperature of each point, insert the deviation compensation value into the system, so that the monitoring accuracy is corrected within ±1℃. Verification and Completion The system is run for 30 minutes continuously to verify that the temperature is stable and unbiased at all points. The calibration data is collected and archived. The full calibration process is complete.

This method is a compromise between efficiency and precision and is valid for most industrial hot runner situations.