Understanding the NI Certificate of Calibration

Updated Aug 6, 2021

Issue Details

When I purchase a device or use NI's Calibration Services, I get a Certificate of Calibration that has many different dates and pieces of information. What do those mean?

Solution

The Instrument Certificate that NI provides is divided into four main sections, as shown in the image below:

Red Section: Your Device

The first section of the document refers to your device. (For example: USB-6341). This section contains the information regarding the calibration status of your product. You will find here:

  • Certificate Number: Unique tracking number for the device's certificate of calibration.
  • Date Printed: Date on which the certificate was generated. Note: This date is not the Calibration date.
  • Serial Number: Enlists the unique serial number of the product.
  • Part Number: Enlists the part number of the product. This part number also helps track the version of the hardware that was tested.
  • Description: The name of the product. An easier way to know which product this document refers to, without needing to look up the part number.
  • Calibration Date: Date in which the device was calibrated using NI standards and procedures.
  • Calibration Due Date*: The calibration due date is up to the customer to determine, based on the date the product is received and the recommended calibration interval. See the blue section for more details.
  • Recommended Calibration Interval: The amount of time that NI recommends between device calibration sessions.
  • Temperature: The temperature at which the device was tested.
  • Humidity: The humidity at which the device was tested.

 

Green Section: Standards Used

NI lists information about the instruments used to test your device to assure you of the validity of our calibration testing: instrument manufacturer, model, tracking number, calibration date, and calibration due date.
 

Blue Section: Calibration Due Date Calculator

This section contains a table to help the customer determine whether their product should be calibrated again based on the date the customer received the product and the recommended calibration interval. It also provides instructions on how to help track that calibration due date.
 

Yellow Section: Additional Notes

Besides the hard data provided, NI includes some texts with explanations and disclosures regarding your device and the information we present. This section includes notes that are relevant to you and the calibration auditors when interpreting the numbers shown in the document.

Additional Information

Some NI devices or modules do not need to be calibrated and therefore do not have a Calibration Interval. Any NI device or module that has Warranted Specifications will need to be calibrated, and should have a Calibration Interval listed in the Specifications or Datasheet.
 

If your device does not have Warranted Specifications and does not require calibration then neither the Specifications nor the Datasheet will define a Calibration Interval. Similarly, if your device does not require calibration and you use the Instrument Certificate Generator, no Calibration Date or Calibration Interval will be listed in the Board Information.