The DLRO instruments 10 and 10X find varied applications to suit the needs of individual users. Accurate measurements of low resistance may range through inspection of components of received goods to welded joints and ground bonding. The typical applications include making simple D.C resistance measurements in the following:
- Busbar and cable joints
- Contact breakers and switch resistance
- Welded joint integrity
- Static control circuits and aircraft frame bonds
- Quality control in resistive components
- Inter-cell connections of battery systems
- Motor winding and transformer resistance
- Pipe and rail bonds
- Welds, fuse and metal alloy resistance
- Cable and wire resistance
- Composites such as graphite electrodes
- Lightning conductor and transmitter aerial bonding
Measurement modes available for the Megger meter
Both the DLRO instruments- 10 and 10X, work on varied measurement modes. The DLRO 10 displays the average of measurement achieved while the DLRO 10X is capable of displaying both average and individual measurements.
In normal mode, tests can be initiated by pressing a test button present on the front panel. All four connections are maintained in continuity and then the reverse and forward currents are applied.
In auto mode, reverse and forward current measurements are made and the average is put on display by simply making contact with the four probes. Every time you attach the set of probes, a test is done without necessitating any button pushes.
In continuous mode, repeated measurements may be made onto the same sample. Just connect the leads and push ‘test’ and the measurement is automatically updated once every 3 seconds till such a time as the circuit is broken.
In inductive mode, the instruments are employed in measuring inductive loads. Measuring inductive loads require you to wait until the voltage is stabilized. Once the test leads re properly connected and a test current is started, the instrument needs to wait a few seconds for the voltage to get stabilized. Measurement here is made only with forward current.
Unidirectional mode is present only in DLRO 10X. The current is applied along a single direction. Although this speeds up the overall measurement process, standing emfs present in the circuit cannot be negated. The testing process begins automatically right after the probes are connected.