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 high-performance applications requiring simultaneous verification of dielectric strength and insulation integrity.
Technical Specifications
Dielectric Strength Testing
• 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.
