VITREK 944i dielectric analyzer

The VITREK 944i is a multi-functional dielectric analyzer that combines AC Hipot, DC Hipot, insulation resistance, and earth continuity testing in a single compact instrument. Purpose-built for manufacturing test, product safety engineering, component evaluation, and R&D environments, the 944i delivers four critical electrical safety measurements from one connection point. Its automated, menu-driven interface and compliance with UL, CSA, IEC, and TUV standards make it suitable for applications requiring simultaneous verification of dielectric strength and insulation integrity.

Technical Specifications

• AC Hipot: up to 5 kV AC standard, 35 mA sourcing capability, 50 Hz to 100 Hz output frequency with 1 Hz resolution, digitally synthesized low-distortion sine wave


• DC Hipot: up to 5 kV DC standard (optional upgrades to 7 kV DC and 10 kV DC), user-selectable slew rate from 10 V/s to 1999 V/s


• Current Limits: 35 mA (20 mA below 500 V); leakage current measurement to 1 nA; real, apparent, and total current sensing modes; arc detection selectable 3 to 30 microseconds with 10 ms shutdown


• Voltage Accuracy: ±70.7 VAC / ±53.0 VDC at 5 kV; tolerance equals square root of output voltage (e.g., ±10.0 VAC at 100 VAC) Insulation Resistance (IR) Testing


• Measurement range: 1 MΩ to 10 TΩ with expanded ranges to 500 GΩ or 65 GΩ


• Test current: down to 10 nA at 5 kV DC Earth Continuity Testing


• Full scale: 8.5 Ω maximum (including lead resistance), 1 mΩ resolution


• Test current: 50 mA


• Automatic lead compensation; accuracy ±0.3% of reading + 30 mΩ Display & Control


• 40-character alphanumeric LCD; 1 V AC/DC voltage resolution


• Stores up to 200 test steps; automatic test abort on limit exceedance


• Illuminated HV indicator with independent output voltage monitor Safety & Diagnostics


• Built-in automatic calibration and diagnostics


• Internal watchdog safety monitor

Key Features

• Four electrical safety test parameters from single connection


• Digitally synthesized AC output waveform with selectable frequency and current limits


• Leakage current sensitivity to 1 nA; insulation resistance to 10 TΩ


• Configurable arc detection with sub-microsecond response


• Automatic two-wire lead resistance compensation for continuity testing

Typical Applications

• Manufacturing production test of electrical assemblies and components


• Product safety certification and compliance verification


• Insulation system evaluation and qualification


• Research and development of high-voltage and protective systems

Compatibility & Integration The 944i meets UL, CSA, IEC, and TUV safety standards, supporting widespread integration into test facilities requiring multi-parameter dielectric evaluation.