Hello vmie74,
The part number 1597-314990621-ND does not come with a Calibration Certificate. You will not be able to download, or just get one from the manufacture, as each Calibration Certificate is serial numbered for one specific device. To get the certificate, you will have to send your device to the manufacture to get it calibrated. You will have to contact the manufacture to see if they will certify it, and how you would proceed for sending the device to them.