Now available from Martindale Electric, the new CM69 TRMS AC Leakage Clamp Meter is ideal for troubleshooting leakage currents where other clamps can’t, for example, for tracking down the causes of nuisance RCD tripping.
Featuring class leading low current performance with a resolution 0.001mA the new clamps make it easy to accurately measure AC currents from less than 0.1mA right up to 60A.
The CM69 features a unique jaw design that minimises the influence of adjacent current conductors enabling professionals to perform precise and reliable tests at very low currents.
One of the few testers on the market which uses True RMS measurement, the CM69 ensures that leakage currents can be identified and measured accurately even when due to harmonics.
The new design also includes a switchable filter enabling repeatable periodic measurements at 50Hz for assessing insulation quality and deterioration without powering down the circuit.
The advanced features and high resolution make the new clamp an essential live troubleshooting tool for all electricians.
The very low current capability means it can also be used to simplify appliance testing by measuring leakage currents through the earth conductor or by clamping around both live and neutral conductors to measure the differential leakage current.
The new compact clamp includes AC/DC voltage measurement, plus resistance and continuity functions.


