引用記事:NIST Technical Note 1458

NIST Measurement Service for DC Standard Resistors








Newer NIST DCC systems are commercial automated binary DCC bridges purchased in 1996

and 2003, and are used for many calibration measurements for resistance values up to 10 kW, and

for high-current resistors. The 1996 system consists of an automated current comparator bridge

with internal 150 mA sources, a 100 A range extender unit, a scanner with selecting relays for

the resistance standards, a 0 A to 100 A power supply, and a 0 A to5 A power supply. The 2003

DCC system contains updated electronics and extends the current range by an additional step to

400 A. This 400 A DCC system is undergoing installation and testing at the time of publication.