During installation of electrical systems in plant engineering, the multimeter ensures accurate voltage and continuity checks across control panels and motor circuits. It is essential for verifying correct wiring before energizing equipment, preventing short circuits and ensuring safe operation. Technicians use it to test sensors, actuators, and distribution boards, confirming all components meet electrical standards. In maintenance, the multimeter helps diagnose faults in automation systems by identifying open circuits or incorrect voltage levels, guiding repairs without unnecessary downtime. It is also critical during commissioning of new machinery, where precise measurements validate system integrity before full operation. In installations involving programmable logic controllers (PLCs), the multimeter supports troubleshooting by checking signal integrity and power supply stability. Its role extends to routine inspections, where it monitors electrical performance over time, ensuring reliability in harsh industrial environments. By providing real-time feedback, the multimeter enables operators to make informed decisions, maintaining efficiency and safety across plant operations.