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Method for the Absolute Calibration of Direct-Current Current Transducers
- Source :
- IEEE Transactions on Instrumentation and Measurement. 68:1961-1966
- Publication Year :
- 2019
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2019.
-
Abstract
- This paper describes an absolute method for calibrating commercial 1000:1 dc current transducers (DCCTs). By adding two auxiliary windings to produce 10:1 and 100:1 ratios, we use a three-step build-up method to establish the 1000:1 current ratio standard. First, we determine the 10:1 ratios of 11 DCCTs through permutation; second, we set up a two-stage composite DCCT to produce a 100:1 ratio; after switching auxiliary windings in the two-stage setup, we then derive the 1000:1 current ratio. The experimental results show that the requirements for the current source and the current meter are not stringent; their Type-B contributions to the overall uncertainties are very small. Type-A uncertainties which include factors such as the experimental environment and possible drifts of the output offsets of the DCCTs are experimentally determined. Repeated tests show that the current ratio standard has an expanded uncertainty of $0.26 \times 10^{-6}$ for the 1000:1 ratio.
- Subjects :
- Physics
020208 electrical & electronic engineering
Direct current
02 engineering and technology
Current source
Current meter
Transducer
Current ratio
Electromagnetic coil
Control theory
0202 electrical engineering, electronic engineering, information engineering
Calibration
Electrical and Electronic Engineering
Current (fluid)
Instrumentation
Subjects
Details
- ISSN :
- 15579662 and 00189456
- Volume :
- 68
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Instrumentation and Measurement
- Accession number :
- edsair.doi...........23429e035073ac2d2bbd5eab00883f76