Yokogawa Electric Corporation 321345CALD Analog Insulation Tester

The Yokogawa 321345CALD Analog Insulation Tester is a portable handheld instrument that measures insulation resistance in electrical circuits and equipment, with a test voltage of up to 1000 V and a resistance range to 2000 MΩ. Designed for field testing, electrical maintenance, power distribution systems, and industrial facilities, it helps maintenance teams, electricians, and system integrators verify insulation integrity and troubleshoot faults. Key features include one-touch press-and-lock continuous measurement, vibration- and shock-resistant construction, and battery operation (AA batteries typical). It also provides AC voltage measurement up to 300 V and conforms to the JIS C1302 insulation testing standard. Common applications include insulation testing of cables, motors, transformers, and other electrical installations. Model numbers: 321345, 321345CALD, 3213A.