Based on the previously focused scenario of hot runner response speed testing and the background of the standard 12-month calibration cycle for high-precision thermometers, the calibration cycle can be appropriately extended under strict conditions:
A complete equipment usage log must be established, and the deviation of calibration data for at least three consecutive tests must be significantly lower than the accuracy threshold of ±0.01℃, with no drift records.
The equipment must be used only in a temperature-controlled, dust-free laboratory environment, without impacts or frequent movement, and with extremely low usage frequency.
The extended cycle cannot exceed 18 months and must be filed with the metrology management department in advance to ensure that the accuracy requirements for hot runner testing are still met.
For thermometers used in routine industrial settings, extending the calibration cycle is not recommended to avoid accuracy drift affecting the hot runner test results.
