COMPARISON OF HIGH VALUE RESISTANCE STANDARDS USING THE MODIFIED WHEATSTONE BRIDGE AND PICOAMMETER

• Abstract:

  In this paper is presented the method for comparison of high value resistance standards by using the modified Wheatstone bridge and picoammeter as current detector, instead of low-impedance current-sensing transimpedance amplifier. Basically, the resistance ratio r can be measured on nominal levels 1:1, 10:1 or 100:1, ensuring the traceability chain from the reference standards of 10 MΩ and 1 GΩ for the range of interest 10 MΩ to 100 GΩ.
• Keywords:

  calibration, high resistance standards, zero-current measurement, modified Wheatstone bridge
• Download:

  IMEKO-WC-2012-TC4-O8.pdf
• DOI:

  _unreg_wc-2012.TC4-O8

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