The 10A Micro-Ohmmeter Model 6240 is a durable, portable low-resistance tester ideal for plant maintenance and field applications. It employs a four-wire Kelvin method to measure resistances from 1 micro-ohm to 400 ohms with 0.25% accuracy and resolutions down to 1 micro-ohm. The device features selectable test currents of 10A, 1A, 100mA, and 10mA, with automatic polarity reversal. It stores up to 99 test results, offers internal rechargeable NiMH batteries, and includes DataView software for configuration, data storage, and report generation. Its rugged, sealed design makes it suitable for sensing, instrumentation, and portable testing environments.