The National Institute of Standards and Technology (NIST) has developed two new multi-junction thermal converter (MJTC) models, SRI 6002a and 6002b, which are now restricted for sale. These devices serve as the international standard for measuring alternating current (AC) voltage and current.
Traditional thermal converters consist of a thermocouple placed in the middle of a heater wire, providing broad frequency response from 10 Hz to over 100 MHz. However, modern MJTCs, fabricated using semiconductor techniques, offer larger dynamic ranges and smaller AC-DC differences compared to their traditional counterparts.
The new MJTCs are fabricated on fused silica substrates and bonded to AL2O3 carriers, with protective covers. They are designed to minimize thermoelectric errors, resulting in smaller AC-DC differences for more accurate AC voltage measurements. These standards are crucial for maintaining international consistency in AC-DC difference measurements.
Source: https://www.nist.gov/sri/standard-reference-instruments/sri-6002-multi-junction-thermal-converter
Keywords: MJTCs, Thermal Converters, Semiconductor
