The M3 Digital LCR meter defaults to Auto-detect, Auto-model operation at power up with a test frequency of 1kHz. When a capacitor, inductor, or resistor is properly connected to the test clips, the device will be recognized automatically, within limitations as defined below. To measure a device, connect the HD and HS clips to one lead of the DUT and connect the LD and LS clips to the other device lead. Do not hold the clip leads while the DUT is being measured. The LCR meter will automatically select the correct Range for the detected device as well as the most appropriate Model (series or parallel). Pressing the L/C/R/Z key will manually step through the measured major and minor parameters for the DUT. Pressing the Model key will manually switch between Series and Parallel equivalent circuits. To return to the Auto detection mode, press the L/C/R/Z key for two seconds or more. To return to the Auto-Model mode, press and hold the Model key for two seconds or longer.
Temperature can have a large impact on the DUT impedance. Usually, capacitors have large temperature coefficients except for ceramic COG capacitors, which can exhibit only a 0.003%/°C variation. Inductors, especially those with non-air cores, may vary largely with temperature. Ambient and DUT temperature drifts may introduce error into the measurement. Control ambient temperature changes to reduce errors.
Capacitors :
Capacitors are measured in Farads. The basic construction of a capacitor is a dielectric material between two electrodes. The many different types of capacitors available are classed according to their dielectric types. The figure below shows the range of generic capacitance values for standard types.