AEMC 6240 Four-Input Digital Microohm Meter with 10A Kelvin Clips and DataView Software, 6 Test Ranges, 400 Ohms Resistance

The AEMC 6240 digital microohm meter with data analysis software is a manual-ranging four-input meter with six test current and resistance ranges for precise, low-resistance measurements from 1 microohm (μΩ) to 400 ohms (Ω) of switches, relays, test wires, cables, printed circuit boards, and other electrical components. Four input terminals enable Kelvin-type, four-wire resistance measurements, which are more accurate than two-wire resistance measurements. The meter includes PC software for configuring the meter, storing and analyzing data, generating reports, and performing temperature compensation of readings. The software is compatible with Windows XP, Vista, 7, and 8, and requires at least 80MB of hard disk space. A cable with USB connector is included for connecting from the meter's optical interface to a PC. The meter's memory function allows storage of up to 99 readings. The polarity reversal function improves reading accuracy by compensating for interference from thermal electromagnetic fields (EMF). When measurement is complete, residual voltage will be automatically discharged from the device under test. Built into a sealed field case, the meter has a 4,000-count LCD with a backlight for visibility in low light. It operates on a rechargeable 6-volt nickel-metal hydride (NiMH) battery pack (included) and has a low-battery indicator that signals when the battery needs to be recharged. It comes with a set of test leads with Kelvin clips, data analysis software, a pad of 50 test results forms, an interface cable with USB and optical connectors, a 115V power cord, two 12.5A replacement fuses, a carrying bag, and instructions. Milliohm meters are commonly used for electrical maintenance and testing in industries such as heating, ventilation, and air conditioning (HVAC), transportation, telecommunications, power plants, and utilities, among others.

This manual-ranging meter allows the user to select the operating range for measurements. Accuracy and resolution specifications vary according to the range being measured. It meets European Standard (EN) safety standard 61010-1 and is rated for category III installations to 50 volts, which covers equipment in fixed installations, such as switches in the fixed installation and some industrial equipment that is permanently connected to the fixed installation, and category II installations to 300 volts, which covers energy-consuming equipment connected to a fixed installation, including household, office, and laboratory appliances. It has European Conformity (CE) marking.

Specifications

H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Ohmmeters measure resistance to the flow of current in an electrical component or circuit and check the continuity of an electrical circuit to detect electrical problems such as degraded insulation and improper circuit connections in equipment, wiring, and power supplies. Resistance is an indicator of the overall condition of the device being tested. Microohm meters and milliohm meters measure small resistance values, and megohm meters (also known as megaohm meters, or insulation resistance meters) measure large resistance values. Ohmmeters have an internal power supply, such as a battery or a capacitor, which supplies current to a circuit or component that is turned off. Test leads are connected in a series to the meter and the circuit or device being tested. As current flows through the circuit or device, the meter calculates the difference in voltage between the leads and measures the resistance. Ohmmeters have either two or four input terminals for test lead attachment. The two-terminal, or two-wire, measurement method provides measurements that include the resistance of the circuit or device being tested and the resistance of the test leads. Megohm meters generally use the two-wire method because it provides sufficient accuracy for measuring large values of resistance in insulation testing applications. The four-wire method eliminates resistance from the test leads and measures only the resistance of the circuit or device being tested. Milliohm and microohm meters generally use the four-wire method because it provides a greater degree of accuracy for measuring smaller values of resistance in low-resistance applications.

AEMC Instruments manufactures electrical testing and measurement instruments, including clamp meters, power quality analyzers, ground resistance testers, and data loggers. The company, founded in 1893, is headquartered in Foxborough, MA.

What's in the Box?

• AEMC 6240 digital microohm meter
• Set of test leads with Kelvin clips
• Data analysis software
• Pad of 50 test result forms
• USB interface cable
• 115V power cord
• (2) 12.5A fuses
• Rechargeable 6V nickel-metal hydride (NiMH) battery pack
• Carrying bag
• Instructions