The Megger IMT100 (1015-518) Industrial Multi-Function Tester features dedicated four-wire insulation resistance and Kelvin low resistance features that are ideal for comprehensive testing of industrial applications, photovoltaic (PV) systems, and electric vehicles (EV).

This unique instrument comes standard with more than 13 testing features for a complete suite of insulation and low resistance testing capabilities. These testing features include insulation resistance, AC and DC voltage measurement, continuity, digital low resistance ohmmeter (DLRO), motor direction of rotation test, capacitance, inductance, and temperature. With only one instrument, the user can perform effective continuity, bonding, and insulation resistance testing. The supplied thermocouple probe is safety rated to CAT III 600V and enables the user to test temperature and insulation resistance compensation.

The IMT100 is suited for use with a variety of industries for testing purposes. Photovoltaic installations on a domestic, industrial, or utility scale can benefit from insulation resistance, Dielectric Absorption Ratio (DAR), Polarization Index (PI), and Electrical Bonding verification. Electric vehicles, including Hybrid (HEV), Plug-In Hybrid (PEV), or Battery-Powered (BEV) vehicles, within both manufacturing and workshop purposes all benefit from the low resistance bonding testing with 2, 3, or 4-test lead methods. Industrial and domestic installations can utilize the frequency and TRMS AC voltage, DC voltage, 3-phase rotation, temperature, and capacitance measurement. Rotating machinery can benefit from timed insulation testing and motor direction of rotation.

The instrument can test insulation resistance from 100 ohms up to 200 gigaohms with test voltages of 50 volts, 250 volts, 500 volts, 1 kilovolt, and selectable variable voltage. The IMT100 includes a guard terminal in which connection of this terminal on certain applications provides a return path for parallel leakage currents. This return path prevents significant errors in the insulation measurement that would otherwise occur. Several diagnostic insulation resistance functions are supported, including spot reading, polarization index ratio, and timed insulation testing. The IMT100 comes with an unique four-wire digital low resistance function that includes a stable power supply that can deliver 200 milliamps in long circuits with a resistance range from 1 milliohm up to 10 ohms. This unit offers different test modes selectable through a soft keypad, including bidirectional, unidirectional, automatic, and continuous modes. The rotary switch and soft keypads are easy to operate, with or without gloved hands, and the instrument’s full color graphic display makes it easy to select functions and take readings.

The LRC function allows the IMT100 to automatically determine if the main element of the load is inductive, capacitive, or resistive. This determination is then displayed with the result on-screen. This function also gives the user the ability to select each function and frequency to 120 hertz or 1000 hertz. The IMT100 also comes with data storage management for up to 256 test results with individual tag names and dates. These test results can be downloaded to an USB drive and are also accessible within the instrument via a dedicated color-guided recalling test results dashboard.

This instrument is designed to be exceptionally safe to use. The fast-detecting circuitry reduces the likelihood of damage to the instrument if accidentally connected to live circuits or across phases. Both the international requirements of IEC 61010 and IEC 61557 are met. Live circuit detection and test inhibition on all measurements include an user notification-- except for direction of rotation measurements. Insulation test terminal lockout voltage is user selectable with the default voltage being 50 volts. When the protection fuse has failed, the detection and inhibit functions will be enabled. This instrument is suited for use on CAT III applications and supply voltages to 600V. The IMT100 is manufactured in an over-molded case which increases protection and robustness, achieving an IP54 weatherproof rating.