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Session:
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2B - Resistance Metrology
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Date & Time:
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Monday August 7, 2:30 PM - 4:00 PM
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Paper Title:
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Enhancing Long Scale Digital Multimeters and Multifunction Calibrators
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Speaker:
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Mark Evans, Software Developer
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CoAuthors:
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Speaker Info
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Company:
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Guildline Instruments Limited
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Department:
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Engineering
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Address:
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P.O. Box 99
, 21 Gilroy St. Smiths Falls, ON, K7A4S9, United States
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Phone:
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(613)-283-3000
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Fax:
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(613)-283-6082
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Email:
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mark-evans@guildline.ca
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Abstract:
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With stability and uncertainty advancements in long scale digital multimeters as well as multi-function calibrators, difficult challenges are presented in maintaining reasonably high level of calibration support. These high level order standards also have extremely good short term stabilities (typically 90 days or less) that many users would have need to use, but would have difficulties in supporting. This paper discusses the adaptation of using a DCC bridge-based resistance measurement system to develop automated methods in characterizing the resistance measurements on these high order standards at specific points. This process is beneficial in achieving the best possible accuracies from these laboratory standards by either automating and maintaining uncertainties for short term stabilities, as well as allowing the standards to also be used as transfer devices. This process enables true productivity in high volume calibration environments as well as minimizing valuable "hands on" time for the calibration technician. This automated method now makes it practical to characterize high-end standards on a frequent basis and operate the standards under a short-term stability specification with allowance for the uncertainty associated with the characterization. The system architecture, the calibration process, and automated quality assessment method is explored in this paper. The data from typical results achieved by this method will be presented. Improvements in specification, measurement uncertainty as well as productivity will be expressed.
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