calibration interval question

[ioanandrei.ciurdar@leoni.com]

I have at work a spare PXI 4065 which is calibrated until April 2015.

On the production line I have another PXI 4065 which is calibrated until February 2015.

I never use the spare PXI 4065 until February 2015. Question: If I put the spare PXI 4065 into the production line in February 2015, that means according to calibration certificate that my spare DMM is calibrated only for 2 months?Then I have to resend it to calibration?

Please help!I looked at the calibration documents and the 2 labels with due date for calibration and I'm confused...  

[Michael5000Watts]

Hi,

NI recommends calibrating your NI PXI-4065 every year (NI 4065 Calibration Procedure), but the calibration interval is really determined by the specifications you require. Regardless of how the device is being used, the specifications of the NI PXI-4065 are dependent upon the time interval since last calibration. This means that the 1-year specifications for your spare PXI-4065 are only guaranteed until April 2015, even if it is not used until February 2015. We typically list specifications for 24 hours since last calibration, 90 days since last calibration, and 1 year since last calibration. Outside of one year, we do not guarantee any specifications. For more information regarding guaranteed specifications, please see the NI 4065 specifications.

Hopefully, you find this explanation helpful.