Safety Warningswww.megger.comDLRO2 and DLRO2X11 The circuit under test must be switched off, de-energized, securely isolated and proved dead before test connections are made. Circuit connections, exposed conductive parts and other metalwork of an installation or equipment under test must not be touched during testing. Only Megger approved test leads with right-angled instrument connectors must be used with this instrument. Test leads must be at least 1 m in length and provide a total loop impedance ≥ 26 mΩ. When inductive loads are measured it is essential that the current carrying leads are securely clamped to the item being tested and that they are not removed before any stored charge has been discharged at the end of the test. Failure to comply with these instructions might result in an arc being produced which might be dangerous for the instrument and the operator. All test leads, probes and crocodile clips must be in good order, clean and with no broken or cracked insulation. Verify the integrity of the test leads before use. The safe maximum limit of a measurement connection is that of the lowest rated component in the measurement circuit formed by the instrument, test leads and any accessories. Ensure that hands remain behind finger guards of probes and clips. 2.3 Test lead safety warnings: Test leads, including crocodile clips, must be in good condition, clean, dry, and free of broken or cracked insulation. The lead set or its components must not be used if any part of it is damaged. The safe maximum limit of a measurement connection is that of the lowest rated component in the measurement circuit formed by the instrument, test leads and any accessories.2.4 Installation category definitions:CAT IV – Measurement category IV: Equipment connected between the origin of the low-voltage mains supply and distribution panel.CAT III – Measurement category III: Equipment connected between the distribution panel and electrical outlets.CAT II – Measurement category II: Equipment connected between the electrical outlets and user’s equipment.Measurement equipment may be safely connected to circuits at the marked rating or lower. The connection rating is that of the lowest rated component in the measurement circuit.
