Calibration and troubleshooting are two very different requirements. Calibration maintains product quality; troubleshooting affects product quantity. Calibration happens on a schedule; troubleshooting happens in emergencies. Calibration must be precise; troubleshooting must be fast.
When a production line is down, speed is of the essence. The failed component must be isolated and replaced ASAP. With a precision multimeter, you can perform quick, go/no-go checks on most temperature transducers, and while these tests tell nothing about transducer accuracy, they will tell you if a transducer has failed.