1. Executive Summary

Every service technician asks the same question before buying new test equipment. Will this tool help me diagnose or fix the problem faster, accurately, safely, and reliably? The Testo 770-3 clamp meter answers this question directly. Traditional spring-loaded jaws struggle inside tight control cabinets. You often have to pry hot wires apart with your hands. The Testo 770-3 solves this problem completely. It features a unique retractable pincer arm. You can hook individual wires without touching them safely.