The calibration cycle for thermocouples with Husky temperature controllers should not be more than 12 months, as per industrial metrology management rules. Calibration must be scheduled following expiration; this is a mandatory triggering 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 Triggering Criteria: If the temperature reported by the Husky temperature controller deviates from the actual temperature in the hot runner for a prolonged time exceeding ±3℃, after ruling out loose wiring or hardware damage, calibration is required.
If the temperature controller's temperature display shows continuous drift, with a unidirectional temperature deviation exceeding 2℃ after 30 minutes of continuous constant temperature operation and no signs of hardware failure, it indicates that the thermocouple's thermoelectric characteristics have drifted, and calibration is needed.
If injection-molded items display clear temperature control-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 calibrated right away.
Verification Test Trigger Judgement: If a comparative test is performed using 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 grade, 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 identify whether Husky thermocouples require calibration, avoiding inaccurate temperature measurements due to extended service life and affecting product quality.
