A dry block can be used to calibrate a temperature sensor. The selection to use internal or external reference sensor depends on the accuracy requirement of the sensor to be calibrated. If the Pt100 to be calibrated is very accurate, it is recommended to use a high accuracy external reference sensor.
You are just reading the indication of the two sensors with out a known standard sensor to compare to the unknown two sensors whom you are reading with your instrument. A calibration process is that you are comparing an unknown item with lower accuracy against a known item with higher accuracy. Raffy Garcia
HI, thanks for your comments. I agree with you. In this application the Pt100 sensors are calibrated comparing them against the calibrated internal reference sensor of the dry block. As mentioned in the video, you can also use an external reference sensor, which typically enables better accuracy (smaller uncertainty). The selection between internal or external reference depends on the uncertainty requirements of the sensor to be calibrated. Thanks!
Hi,the sensors has passed three points with acceptance tolerance but in this case we can't say you calibrate the sensors like the calibration of transmitters(A/D,D/A) calib.
Hi Sir, with the term "calibration" in this video we did the comparison against a more accurate reference, but we did not perform adjustment. Formally calibration is a documented comparison, and possible adjustment is another step. We know that in common language, the calibration often equals adjustment. Anyhow, adjustment is often included in the calibration process. I hope this explains.
Hi, we like to follow the international definition of calibration which is "documented comparison against an accurate reference standard", and the adjustment/trimming is a separate process. In this video we did not adjust the sensor, and most often that is not even possible - instead you calculate the correction coefficients that can be used in the measuring device to correct errors. Thanks,
