Periodic Trigger Judgement: According to industrial metrology management requirements, the calibration cycle for Husky thermostat thermocouples should not be more than 12 months. Calibration must be scheduled after expiration; this is a required trigger calibration condition.
If the thermocouple has recently been disassembled, changed, or re-welded, calibration must be performed before it is used to ensure that the temperature measurement accuracy fulfils standards.
Abnormal Operating Condition Trigger Judgement: If the Husky thermostat displays a temperature difference of more than ±3℃ from the actual temperature in the hot runner, calibration is required after ruling out loose wiring or hardware damage.
If the thermostat temperature display shows continuous drift, with a unidirectional temperature deviation exceeding 2℃ after 30 minutes of continuous constant temperature operation, and there are no signs of hardware failure, it indicates that the thermocouple's thermoelectric properties have drifted and calibration is required.
If injection-molded items display clear temperature-related moulding faults (such as flash, inadequate glue, or colour difference) and it is determined that this is due to temperature measurement error, the thermocouple must be adjusted right away.
Verification Test Trigger Judgement: If a comparative test is performed with a standard thermocouple at commonly used production temperature points in the hot runner, and the temperature difference between the two exceeds the allowable error range for the corresponding thermocouple graduation, calibration is required.
If a thermocouple has been continually functioning at temperatures above 300°C for more than 6 months, even if there are no visible anomalies, supervised calibration is required to detect potential accuracy drift.
Prior to the manufacturing line's annual quality system audit, all Husky temperature controller thermocouples must be calibrated to provide traceable and compliant temperature measurement data.
Using these multidimensional judgement criteria, it is feasible to precisely assess whether Husky temperature controller thermocouples require calibration, avoiding inaccurate temperature measurements owing to extended service life and affecting product quality.
