This method has been refined over the years, and NIST reports that they can now calibrate transfer standards with an uncertainty of 0.67% [3][8] for 100 W measurements below 1 GHz. This uncertainty ...

In the EEMG, we have proposed the Bristol Calorimeter, an alternative Closed Single-Jacket Surface-Heated calorimeter topology, which decouples the measurement chamber from the instrumentation and ...