A digital low resistance ohmmeter that delivers reliable results when using long test leads is available from Megger. The DLRO2, a 2 Amp handheld tester, is ideal for use in production line testing and industrial applications.
A dedicated long test lead mode optimizes the instrument to work with very long test leads. The device can 
Source: Meggerprovide up to 1 A of test current into 4 Ohms resistance, making the DLRO2, with its optional cable test reel leads, ideal for testing wind turbine and avionic lightning protection applications.
The DLRO2 is equipped with a ‘difference meter’, which allows repetitive measurements to be easily compared with an initial reference measurement. The difference meter translates percentage difference to a needle/pointer movement on the unit’s display to make it easier to see the change. This feature is particularly useful for testing a series of manufactured products where the nominal resistance value for the product is stored, and the user only needs to note whether products subsequently tested are within the permissible percentage tolerance range.
Useful when testing three-phase equipment, the DLRO2 can display three measurements at once, providing a quick, easy and reliable way of comparing the resistance measurements for all three phases (for example, three stator windings or three phases of cable joints). The DLRO2 offers three test modes including normal resistance, fast/long leads and inductive resistance.
