Phase Angle Voltmeter, High Accuracy

Model Instrument 2250

Phase Angle Voltmeter, High Accuracy

NAI’s 2250 Phase Angle Voltmeter employs a microprocessor-based design using Fast-Fourier Transform techniques that combine many of the capabilities of today’s network/waveform analyzers in a digital analyzing voltmeter configuration.

Designed for the Synchro/Resolver and LVDT/RVDT marketplace, this instrument accurately makes measurements of phase angle, in-phase, quadrature, fundamental, and total, as well as impedance, power, and harmonics. Isolated inputs allow null, ratio, and gain measurements of key parameters. A reference phase offset facilitates bridging measurements. A sensitive null meter is included for precise nulling. The 2250 is ideally suited for defense, industrial, and commercial applications.

This product is Obsolete. View our Obsolescence Policy for additional information. Please refer to model 2250A for details on the closest replacement product.

Typical Applications:

  • Automatic Test Equipment (ATE)
  • Transformer ratio & phase tests
  • Amplifier gain & phase
  • Phase-sensitive null detection
  • Network transfer function analysis
  • Input/output impedance testing
  • Wide-band, high sensitivity voltage measurements
  • Attenuator linearity testing
  • Harmonic analysis
  • Accelerometer testing
  • Phase angle measurements
  • Synchro/Resolver transducer testing
  • LVDT/RVDT testing
  • Filter testing:
    • Insertion loss
    • Phase shift measurement of power factors
    • Complex impedance phasing of servo motors & servos



  • High accuracy
  • Half the size and weight of existing designs
  • High resolution touch-screen
  • Up to 80 dB harmonic rejection
  • Fast settling time, fully programmable
  • Ethernet, USB, & IEEE-488 ports
  • LVDT/RVDT measurement capability
  • Independent front and rear panel connections

Optional 6 VA internal reference

Document DownloadsDate
2250 Specifications
Measuring LVDT/RVDT Performance
Software DownloadsDate
2250 Labview Driver