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Are recalibration(s) of transducers required after relocating a system to another site?

QUESTION 

 

Are recalibration(s) of transducers required after relocating a system to another site?

 

 

ANSWER

 

Ideally, any time a machine is moved, the recommended practice is to recalibrate.  However, the desire or requirement to do so can depend on various factors.

 

Depending upon what internal and/or external industry quality standards the customer claims to operate in compliance with can also dictate if recalibration is required. As an example, some ASTM and ISO quality standards require recalibration if a machine is moved.

 

If a customer is not claiming to operate in compliance with any industry quality standards which specify recalibration after moving a machine, the choice and level of risk they wish to assume is theirs to decide.

 

Certainty, an internal shunt check of the load cell is a good practice which could detect an undesirable shift (however, it is not a substitution for a full calibration). There is no internal check of the LVDT other than performing a check with an external instrument or a full recalibration.

 

A recalibration is the recommend practice whenever a machine is moved and is also a requirement in some ASTM or ISO standards.  Conducting some basic “checks” may provide some assurance but is no substitute for a complete recalibration.

 

In the end, it is ultimately up to the customer to decide how much risk they wish to assume for their intended measurement and testing application.

 

K
Keary is the author of this solution article.

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