The Megger series of hand held digital multi-meters combine ruggedness with reliability, accuracy and ease of use. These robust instruments are suitable for general purpose applications, including operation in harsh environments. They are supplied with watertight seals at the rotary switch, input terminals and seams to keep out dust, dirt and moisture. There are two instruments that make up the M5000 series, both offering a wide spectrum of measuring functions and ranges. The M5091 has center switch selectable ranges, while the M5097 offers a choice of autoranging or manual-ranging for voltage and resistance measurements. The instruments have basic d.c. voltage accuracies of 0.5%, a continuity bleeper, a diode check and auto-switch-off to preserve battery life. The units are supplied with protective rubber holsters which incorporate a built in tilt stand, a nail hook plus a convenient test lead holder. The M5091 has all the capabilities necessary for general purpose testing. These include five current ranges enabling measurement u to 20 A with a maximum resolution of 0,1 uA, as well as fully specified voltage and resistance measurement parameters.
This high quality test instrument have an automatic power-off facility, meaning that they will automatically switch off after 10 minutes from the last use of the selector switch or the latest measurement. This ensures that the battery power is not wasted if the instrument has inadvertently been left on. The instruments are constructed to be resistant to the type of mechanical shocks experienced in everyday use. They also resist the ingress of moisture and are suitable for use in applications where they might be exposed to inclement weather.