BAPI Certificate of Calibration Form Overview – Application Note

BAPI’s certification form matches the requirements of the National Institute of Standards and Technology data reporting standard.

 

Calibration Certification 1
The first section (above) indicates the product being certified, the customer and the order number.

 

Calibration Certification 2
The second section (above) records the relative humidity, temperature and atmospheric pressure of the test laboratory.

 

Calibration Certification 3
The third section (above) is an inventory of the equipment used to perform the certification. Uncertainty is the tolerance of the instrument’s measurement as determined during its last calibration at a NIST certified calibration center.

 

Calibration Certification 4
The fourth section (above) details the certification results. The column labeled Test defines the test procedure or procedures that were used to certify the product. The column labeled Units defines the units of measure used for the test. The three test conditions for this certification were 0°F, 40°F and 80°F.

 

The column labeled “Reference” is the actual test condition as measured by the Calibration Standards referenced in the inventory described above. For the test shown, the test condition at 0°F was actually -0.2°F, we achieved 40°F and 80°F was actually 80.6°F. The next column labeled “Uncertainty” is the tolerance of Calibration standards used to measure the test condition temperature.

The column labeled “As Found” is the transmitters output before any corrections are made to the transmitter. If the output is a 4 to 20mA current loop, the output is changed to the units of the parameter being measured, in this case Fahrenheit temperature. The next column labeled “Difference” is the difference or offset of the As Found to the Reference.

The column labeled “As Left” is the transmitters output after any corrections are made to the transmitter. This is how the equipment is sent to you. If the output is a 4 to 20mA current loop, the output is changed to the units of the parameter being measured, in this case Fahrenheit temperature. The next column labeled “Difference” is the difference or offset of the “As Left” to the “Reference”. This last “Difference” column is the offset you should use in your controller to correct the temperature.

 

Calibration Certificate 5
The last section (above) notifies you that all instruments used to certify the equipment are properly calibrated and traceable to NIST.

 

If you have any questions about the certification documents, please contact your BAPI representative.

Printable pdf Version of this Application Note