Title :
A new AC voltage standard
Author :
Katzmann, Fred L., Sr.
Author_Institution :
Ballantine Labs. Inc., Boonton, NJ, USA
Abstract :
An AC voltage standard has been developed for the 10 Hz to 1 MHz frequency range for rapid calibration of precision 6.5-digit AC voltmeters. Absolute calibration uncertainness of 37.5 p.p.m. in the 40 Hz to KHz range have been demonstrated over a 90-day calibration interval. A fast-responding vacuum thermal element and null-comparing AC to DC converter as well as a stable linear low-distortion analog phase-shift oscillator have been devised to assure stability and performance of the new instrument. Microprocessor control includes IEEE-488 bus capability. Digital calibration permits closed-loop computer-aided calibration and performance verification using a programmable AC-DC transfer standard
Keywords :
calibration; computerised instrumentation; convertors; digital voltmeters; measurement standards; 10 Hz to 1 MHz; 6.5-digit AC voltmeters; AC voltage standard; IEEE-488 bus; closed-loop computer-aided calibration; computerised instrumentation; digital voltmeter calibration; linear low-distortion analog phase-shift oscillator; null-comparing AC to DC converter; stability; vacuum thermal element; Calibration; DC-DC power converters; Frequency; Instruments; Microprocessors; Oscillators; Standards development; Thermal stability; Voltage; Voltmeters;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1988. IMTC-88. Conference Record., 5th IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/IMTC.1988.10868
