MeterTest RD-21 Portable Single Phase Reference Standard
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MeterTest RD-21 Portable Single Phase Reference Standard


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The RD-21 portable single phase reference standard is one of the most versatile reference instruments ever. The RD-21 has a typical accuracy of .01% @ PF=1 for all measurement functions across its entire operating range, with a maximum worst case accuracy of .02%. This worst case accuracy specification includes the variables of stability, power factor, traceability uncertainty and test system errors.

A unique design makes the RD-21 unsurpassed in its ability to accurately measure real world waveforms. An exclusive feature is its analog to digital signal converter. The RD-21 built-in converter is combined with Radian Research renowned electronically compensated voltage and current input transformers and a hermetically sealed reference. This combination-provides the highest degree of accuracy, stability and versatility offered in a portable three-phase standard.

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  • Typical Accuracy: .01% @ PF=1
  • Worst Case Accuracy: .02% @ PF.5
    • SKU
      MeterTest RD-21
  • Brands
    MeterTest
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