I. Verification of basic hardware parameters
Actual RC capacitance deviation: Use a high-precision digital multimeter to measure the actual capacitance value of the locked RC network, confirming a deviation of ≤5% from the calibration reference value.
Filter cutoff frequency verification: Use a standard signal generator to input sinusoidal test signals of different frequencies, confirming an actual filter cutoff frequency deviation of ≤10% from the set value.
Interference attenuation verification: For the main frequency interference signal in the workshop, the measured attenuation after filtering is ≥20dB, meeting the anti-interference requirements.
II. Verification of dynamic signal performance
Temperature measurement delay test: Rapidly change the temperature at the thermocouple terminals and record the delay time for the temperature signal to be transmitted to the temperature controller, confirming ≤200ms.
Signal ripple test: Observe the output temperature measurement signal after filtering with an oscilloscope, confirming a ripple peak-to-peak value ≤10mV and no abnormal noise.
Temperature Stability Test: After 2 hours of continuous no-load operation, the temperature readings showed no irregular fluctuations within ±0.5℃, with no drift.
III. Actual Production Condition Verification
Heating Curve Verification: The hot runner heating process was started, confirming no significant overshoot during the heating process (overshoot ≤3℃) and no oscillation.
Full Load Interference Verification: All high-power injection molding machines and frequency converters in the surrounding workshop were turned on to simulate the maximum interference condition, confirming no temperature reading fluctuations.
Process Adaptability Verification: After 8 hours of continuous production, the product yield was confirmed to be stable, with no defects such as insufficient glue, flash, or stress marks caused by abnormal temperature sampling.
IV. Long-Term Stability Closed-Loop Verification
Lockout Status Verification: After 72 hours of continuous operation, the temperature controller status bar still displayed the "RC Hardware Lock" indicator, with no automatic parameter reset records.
Data Archiving: All verification data was entered into the process archive as a benchmark for subsequent dynamic adjustments during calibration cycles.
