The VAS 6558B is used for measurements on modern vehicles with electric/hybrid drives.

Features:
- Initialization/self-test
- Measurement of the DC voltage (absence of voltage)
- Measurement of the insulation resistance (calculation of the insulation resistance via current and voltage measurement)
- Measurement of the insulation resistance according to SAE J1766 (measurement under load with parallel resistance)
- Measurement of electrical resistance
- Diode measurement
- Potential equalization measurement
- Parameterization through adjustable test voltage: 250 … 1000 volts, measuring current: 1 mA
- Generation of the high voltage, release only after pressing the button, automatic discharge of the high voltage after the high-voltage insulation measurement
- Safety circuit at high voltage (automatic switch-off)
- Function control with 2 LEDs
- Power supply via USB interface, 5 volts / 500 mA
- Interface: Rugged USB 3.0 (for connection to VAS 6150F)
- Galvanic isolation against USB interface
- Calibration with calibration device VAS 5143A

Software:
- VASPC software (connection to guided troubleshooting GFS)
- Integration into "Offboard Diagnosis Information System" with ASAM GDI driver.