How to Calibrate a Sensor After Deep Disassembly and Cleaning

Four straightforward and exact processes are involved in calibration following deep cleaning, maximizing accuracy recovery:

1. After Reassembly, Thermal Stabilization

Reinstall the sensor in the hot runner after cleaning, then heat it to your preferred operating temperature. To prevent further errors brought on by temperature variations, hold for 30 minutes to make sure the sensor and hot runner temperatures are perfectly aligned.

2. Zero-Point Calibration Following Total Release of Pressure

To guaranty zero pressure, fully depressurize the injection molding machine and remove the melt from the runner. Until the sensor output is completely stable, let it stand for ten minutes.

Set the current zero-pressure output on the injection molding machine system/sensor amplifier to the standard value, which is 4 mA by default. Once the settings have been adjusted, save them to finish the zero-point calibration.

3. Deviation from Full-Scale Compensation

Increase the pressure to 80% of the sensor's range (for example, 400 bar for a 500 bar range) after zero-point calibration. Hold the pressure there for five minutes until the output stabilizes.

To make sure the output matches the standard value, compare the sensor's current output with the standard theoretical output, adjust for the system parameter variation, and store the full-scale parameters.

4. Retest and Confirm Calibration Outcomes

Check the zero-pressure and full-scale outputs after repeating the "depressurize → increase pressure" operation once. A successful calibration is indicated by zero-pressure deviation < 0.02mA and full-scale deviation ≤ nominal accuracy, respectively.

It is advised to retest the zero point once daily before beginning work after calibration in order to monitor changes in deviation and to replace the sensor as soon as a new one arrives.