The ST-ASS-200 is a programmable, battery-operated monitoring system for electrical safety testing. It is designed for use in industrial, manufacturing, and commercial applications. It is designed to be used in hazardous locations where traditional electrical safety testing equipment is not suitable. The ST-ASS-200 uses a simple user interface with an intuitive graphical display to provide easy access to all test features and functions. The system is suitable for testing a range of tests for environments such as medium and low-voltage AC, DC and impulse testing, ground bond testing, high-resistance grounding, earth loop impedance and continuity testing, and dielectric strength testing. The ST-ASS-200 is also equipped with a variety of communication ports, including USB, Bluetooth, and RS-485. The ST-ASS-200 is compliant with most global electrical safety standards, including EN 50191, BS 8435, IEC 61511, and ASTM F2820.