The Chauvin Arnoux CA6133 is designed for checking safety on electrical installations. Both CA6131 and CA6133 can be used to test a new installation before powering it up, check an existing installation, whether in operation or not, and to troubleshoot a dysfunction. For inspection organizations, these portable instruments are simple, effective and above all compliant with the applicable standards and it is also used for voltage, continuity, resistance, insulation and loop measurements. The current can be measured with an external clamp. It is possible to test type A & AC RCDs in ramp or pulse mode. The CA6133 also checks the phase rotation. For greater efficiency. It provides an immediate visual indication of the test result (OK/NOK) and to perform all the measurements and tests needed by certification organizations and maintenance teams to qualify an electrical installation.