Primary Voltage Standard: Liquid Helium System

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Cryogenic Analog RF Module
November 15, 2017
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artistic photo of helium tank
The Primary Voltage Standard System with liquid helium is a commercial implementation of the system suggested by the National Institute of Standards and Technology. The NISTVolt™ operating software for controlling automatic calibration of secondary standards and voltmeters is provided with the system.
PVS: Liquid Helium System

The primary Voltage Standard circuits were commercialized in a project with NIST under sponsorship of the U.S. Army to transfer the mature NIST design and merge it with the advanced HYPRES Niobium technology. HYPRES is also adept in the integration and test of Primary Standard Systems and provides a complete “turn-key” system, including training.

  • Generate precision voltages from 10V down to millivolts
  • Eliminate downtime, queue time, and shipping time
  • 2-year replacement warranty on Josephson Standard Chip
  • The Josephson Junction is the “Primary Intrinsic Voltage Standard”
  • The JJAS provides continues tracking of your Zener secondary’s drift
  • All Niobium IC process for Josephson Standard Chip
  • Banks of Zeners not required with the Primary Voltage Standard
  • System based on mature NIST design and on robust HYPRES Niobium Technology
  • Eliminates dividers, potentiometers, banks of secondary references.
  • Save costs and improve efficiency and productivity
  • Does not require calibration
  • Use your JJAS as an Engineering tool to move ahead of your competition
  • No guess work required when calibrating your working standards
  • Eliminate inter-comparisons from banks of Zeners
  • Faster product development cycles by checking linearity and accuracy yourself
  • Niobium chips are impervious to moisture and thermal cycling
  • 100 nV accuracy calibrating secondary standards and voltmeters
  • -11 V to 11V range available from 10-Volt System
  • Typically 1 hour stability time at 10 Volts for 10-Volt System
  • -2.5 V to 2.5 V range available from 1-Volt System
  • Typically 5 hours stability time at 1 Volt for 1 Volt-System
  • Typically 6 weeks continuous operation on one 100-liter dewar of liquid helium
  • Automatic voltage calibration in minutes (vs. hours using secondary standards)
  • Automatic measurement of voltmeter linearity and accuracy
  • Automatic calibration of DVM
  • Complete system diagnostics
Optional Equipment
  • High Stability Frequency Reference from GPS Frequency Standard
  • Solid State Reference Standard
  • Low Thermal Scanner
  • 100-liter liquid helium dewar with compatible top flange