1. Comprehensive Diagnostic Functions
Supports a full suite of resistance analysis tools: Polarization Index (PI), Dielectric Absorption Ratio (DAR), Step Voltage Test (STEP), Ramp Test (RAMP), and Dielectric Discharge Index (DD)—enabling thorough assessment of insulation condition beyond basic resistance measurement.
2. Ultra-Wide Measurement Range
Offers insulation resistance measurement from 0.005MΩ up to 30TΩ (model-dependent), covering everything from low-resistance faults to ultra-high-resistance insulation in high-voltage equipment.
3. High-Resolution Touchscreen Interface
Features a 5-inch TFT color touchscreen that displays test parameters, real-time current, voltage, and timer simultaneously
4. Multiple Output Voltage Options
Provides flexible voltage selection: fixed gears (50V, 250V, 500V, 1kV, 2.5kV, 5kV, 10kV) and user-defined output from 50V to 15kV, ensuring precise testing across various applications.
5. Real-Time Current & Voltage Monitoring
Displays leakage current from 0.001nA up to 7.5mA and monitors terminal voltage in real-time. Automatically prohibits testing if voltage exceeds 36V, protecting both the instrument and the operator.
6. High Short-Circuit Current
Delivers up to 7mA short-circuit current, enabling stable testing even under high capacitive loads—ideal for long cables, large generators, and transformers.
7. Advanced Storage & Connectivity
Stores up to 1000 test records with on-device playback. Features USB and Bluetooth communication for seamless data transfer to PC or Android devices, simplifying reporting and analysis.
8. Rugged & Portable Design
Built with a durable double-layer housing and IP65 protection when the cover is closed—suitable for harsh field environments. Includes clear wiring diagrams printed on the inside cover for quick reference.
9. Long-Lasting Rechargeable Battery
Powered by a high-capacity 14.8V 6.2Ah lithium-ion battery pack, ensuring extended operation time for on-site testing without frequent recharging.
10. Safe & Compliant
Withstands AC 3kV for 1 minute between test circuit and case, with insulation resistance above 50MΩ. Complies with IEC61010-1 and IEC61326-1 safety and EMC standards.
11. Flexible Timing Modes
Features automatic test stop for DAR, PI, and DD tests upon result completion, as well as user-defined test duration from 10 seconds to 3600 seconds to accommodate both quick checks and long-term insulation evaluation.
12. Capacitance Measurement (9620 Series)
Measures capacitance from 10nF to 200μF with ±10% accuracy, adding valuable diagnostic capability for cables and capacitive equipment.





