When recalibrating your measurement device, you have the option to receive data as "As Found", "As Left", or both.
AS FOUND calibration data is calibration data acquired prior to any repairs or adjustments being made to the device. Essentially, it is the condition of the device “as found” when arriving to our facility for calibration. This provides the user an opportunity to ensure that the instrument was reading accurately, and within specification, while it was in use. It offers valuable information and documentation to support an end user's test results, and it also provides record-keeping on the instrument's long-term linearity and stability.
AS LEFT calibration data is calibration data acquired after any repairs or adjustments are made to the device, i.e. the condition the device was left before shipping back to you. The condition of the device used to acquire the as left data will be the same condition in which you will receive your device.