This document introduces the features and technical specifications of the battery-powered high-voltage megohmmeter MODEL 3121, 3122, and 3123. These megohmmeters are portable and suitable for high-voltage insulation testing of heavy equipment, industrial equipment, cables, converters, generators, and distribution panels. They have dual scales with automatic range switching, color-coded scales with LED indicator lights, and waterproof construction. They also have low power consumption and accurate measurement capabilities.
