I. Standard Time Interval
Basic Cycle: To guarantee consistent sensor measurement accuracy and mitigate the risk of drift failure, recalibrate and recalibrate every three months under typical operating conditions.
High-Load Conditions: In workshops with strong vibration/electromagnetic interference or scenarios where the hot runner operates continuously for 24 hours, recalibrate and recalibrate every 1-2 months.
Low-Load Conditions: If the hot runner is operated intermittently, with a monthly operating hour total of less than 100 hours, it is necessary to recalibrate and recalibrate the hot runner every six months.
II. Unique Circumstances That Require Immediate Recalibration
Calibration and recalibration must be implemented promptly in the event that the hot runner experiences thermal expansion lock-up or overheating.
If the sensor displays abnormalities, such as signal jumps, false alarms, or displacement data drift, it is imperative to recalibrate the sensor again promptly following the repair of the fault.
In order to prevent accuracy failure as a result of installation misalignment, sensor recalibration should be conducted concurrently following mould disassembly and reassembly or the replacement of hot runner components.
All hot runner displacement sensors must be calibrated and re-tested during the annual main equipment overhaul of the production line.
III. Supplementary Compliance Requirements
The production line must satisfy the pertinent requirements of the CNAS system if it involves precision injection moulding compliance scenarios, such as automotive and medical applications. Key instruments should typically have a calibration cycle of no more than six months, and testing records must be archived and traceable.
In order to establish a comprehensive equipment operation and maintenance log, displacement error, signal stability, and alarm function verification data must be recorded following each re-test.
This time interval standard is entirely customised to the actual operation and maintenance requirements of precision injection moulding hot runner production lines, thereby minimising unnecessary downtime for testing and guaranteeing the accuracy of monitoring.
