North Atlantic 2250-F1 Digital Analyzing Voltmeter

The North Atlantic 2250-F1 is a 16-bit microprocessor-based digital analyzing voltmeter that combines waveform sampling and FFT-based signal processing to deliver precision voltage measurements across dual isolated channels. It measures conventional phase angle parameters—phase angle, fundamental, in-phase, and quadrature signals—while providing magnitude, phase, and harmonic analysis with ±0.05% accuracy on phase angle and ratio measurements.

– Technical Specifications

Measurement & Signal Processing
• Dual-channel system with identical signal and reference circuitry
• Waveform sampling with Fast Fourier Transform (FFT) and advanced signal processing
• Frequency response: 10 Hz to 100 kHz
• Phase angle and ratio accuracy: ±0.05%
• Voltage resolution: 4½ digits
• Signal input ranges: Six ranges from 20 mV to 300 V RMS full scale
• Reference autoranging: 2 mV to 300 V RMS

Hardware & Interface
• 16-bit microprocessor
• Native IEEE-488 (GPIB) interface
• Isolated input channels allow signals to float with respect to circuit ground
• Non-volatile RAM with battery backup stores all front-panel settings, data input, and calibration data
• Multi-segmented horizontal bar graph display functions as digital null meter

– Key Features

• Isolated dual-channel architecture enables null, ratio, and gain measurements without ground reference constraints
• Bar graph null meter provides analog-like voltage magnitude and direction indication—ideal for synchro zeroing and potentiometer adjustment
• Autoranging on reference levels simplifies signal conditioning across wide dynamic ranges
• Front-panel controls with stored configuration data eliminate setup time between test sequences

– Typical Applications

• Automatic Test Equipment (ATE) systems
• Synchro/Resolver and LVDT/RVDT characterization
• Transformer ratio and phase testing
• Amplifier gain and phase measurements
• Phase-sensitive null detection
• Network transfer function analysis
• Filter testing (insertion loss, phase shift, power factor, complex impedance)
• Harmonic analysis and accelerometer testing
• Servo motor and impedance phasing
• Laboratory and quality control measurement

– Compatibility & Integration

IEEE-488 (GPIB) native interface enables direct integration into automated test benches and system control architectures.