What does the absence of a specific due date on a calibration sticker signify?

The presence of a calibration sticker without a specific due date typically indicates that the calibration is seen as indefinitely valid until further notice. This often occurs when organizations have specific policies or practices that allow certain equipment to remain calibrated based on other forms of oversight or assessment rather than a set fixed recalibration schedule.

This can mean that the equipment is considered stable and reliable under its current operating conditions, or it may be subject to periodic checks that confirm the calibration remains within acceptable limits without a need for a formal due date.

Understanding this context highlights that indefinite validity usually means there is a level of assurance that the equipment will not degrade in a way that would render it out of specification but rather relies on judgment from users and technicians regarding its continued accuracy and performance.