As Found vs. As Left: Demystifying Calibration Data on Your Report

Calibration reports can sometimes feel like deciphering a foreign language. Among the technical jargon and numerical values, the terms "As Found" and "As Left" often cause confusion. Understanding these terms is crucial for interpreting your calibration results and ensuring the accuracy and reliability of your measurement equipment.

At Soft Tech Serv, an ISO 17025 accredited calibration laboratory, we strive to provide clear and concise reports. This guide will demystify "As Found" and "As Left" data, explaining their significance and how they contribute to maintaining the integrity of your instruments. We aim to provide you with the knowledge to confidently assess the performance of your equipment and make informed decisions regarding its use and maintenance.

What is 'As Found' and 'As Left' Data in Calibration?

Defining 'As Found' Data

As Found data represents the condition of the instrument before any calibration adjustments or repairs are made. It's a snapshot of the instrument's performance as it arrived at the calibration laboratory. This data is critical for understanding the instrument's performance in its typical operating environment.

In simpler terms: Question: What is 'As Found' data? Answer: 'As Found' data is the measurement of an instrument before calibration adjustments. This data shows the performance of the device before any maintenance.

Defining 'As Left' Data

As Left data, on the other hand, reflects the instrument's performance after calibration. It demonstrates the instrument's condition after adjustments and repairs have been performed to bring it back within acceptable tolerance limits. This data confirms that the calibration process was successful in correcting any errors or deviations.