General
Output/input ratio	100 mV DC/ A AC

The MN88 is a current clamp of the MN series by Chauvin Arnoux, specifically designed for measuring alternating currents up to 200 A AC. It functions as a transformer clamp, used in combination with a multimeter or power analyzer to monitor current consumption in electrical installations. The clamp generates a direct voltage signal, particularly suitable for measuring devices with limited sensitivity to alternating voltage or current. Its compact design and ergonomic clamp jaw allow measurements in tight or hard-to-reach locations, such as in enclosures or on installed cables.

Applications

The MN88 is intended for use in electrical installations up to safety category CAT III 600 V or CAT IV 300 V. It is particularly suitable for monitoring current consumption in industrial, commercial, and household installations where precise current measurement without interrupting the circuit is required. The maximum jaw opening of 20 mm allows measurement on cables and conductors with a diameter up to this value, making it suitable for many standard installations.

Functions and Features in Detail

The clamp operates on the principle of a current transformer, converting the flowing alternating current into a proportional direct voltage signal. The output signal is 100 mV DC per ampere AC, enabling simple scaling and interpretation of measured values. The output is provided via insulated 4-mm sockets, ensuring a safe and reliable connection to external measuring instruments. The output voltage is thus independent of the frequency of the measured current, simplifying use with devices that do not support direct AC measurement.

Technology Explained Simply

The MN88 converts the magnetic flux generated by the current flowing in the conductor into an electrical signal. This signal is output as a direct voltage, allowing it to be measured by multimeters or analyzers that can only measure direct voltage. The ratio of 100 mV DC per ampere AC means that a current of 1 A produces an output signal of 100 mV. This linear relationship enables accurate and reproducible measurements. The insulation of the 4-mm sockets protects the user and the measuring device from dangerous contact with live parts.

Compatibility and Accessories

The MN88 is designed for use with multimeters and power analyzers that have a direct voltage input function. Connection is made via the insulated 4-mm sockets, which are compatible with standard test leads. The clamp is intended as a standalone device to be used in combination with a suitable measuring instrument.

Mounting and Installation

Installation is performed by simply opening the clamp jaw and encircling the conductor to be measured. The clamp closes automatically and securely holds the conductor. No additional fastening or tools are required. The clamp can be used while the system is in operation, as it does not require interrupting the power supply. The maximum jaw opening of 20 mm must be considered when selecting the clamp to ensure the conductor is fully encircled.

Operational Advantages

The MN88 provides a reliable and safe method for current measurement without interrupting the circuit. The direct voltage output expands compatibility with measuring devices that lack AC measurement capability. The compact form and ergonomic design facilitate handling, especially in confined spaces. The insulation of the output sockets enhances safety when working with electrical installations. The clamp is approved for use in installations up to CAT III 600 V or CAT IV 300 V, making it suitable for many applications in the electrical trade.