This accessory from Chauvin Arnoux is specifically designed for the Micro-Ohmmeter C.A 6292 and is intended for performing four-wire measurements. It consists of a set of two Kelvin test leads, each equipped with screw terminal connections in red and black. This design ensures a stable and reliable connection, minimizing contact resistance, which is essential for precise measurements of very low resistances. The cable length is 6 meters, enabling flexible handling and measurements over greater distances.

Applications
This accessory is designed for applications requiring highly accurate resistance measurements in the range of microohms to milliohms. Examples include testing electrical connections, switchgear, transformer terminals, or the resistance of cables and conductors. The four-wire measurement, also known as Kelvin measurement, separates current and voltage supply lines to avoid measurement errors caused by the resistance of the supply lines. This is particularly important for very small resistances, where even minor additional resistances in the measurement circuit can significantly distort results.

Functions and Equipment in Detail
The two test leads are configured as Kelvin test leads, with each lead having a separate connection for current and voltage measurement. The screw terminal connections allow for a secure and mechanically stable connection to the test object, without requiring additional tools such as pliers or screwdrivers. The color coding (red/black) supports correct assignment of the leads in the measurement setup. The cable length of 6 meters provides sufficient freedom of movement and enables measurements at hard-to-reach or distant points, without the need for additional extension cables.

Technology Explained Simply
The four-wire measurement, realized with this accessory, operates on the principle of the Kelvin bridge. The measurement current is supplied to the test object via two separate lines (current supply), while the voltage is measured directly at the test object via two additional lines (voltage measurement lead). This excludes the resistance of the supply lines, which would otherwise affect the measurement value. The screw terminals ensure that the connection to the test object remains mechanically stable and prevents contact resistance from loose connections. The length of 6 meters is sufficient to allow flexible operation even in larger installations or at distributed measurement points.

Compatibility and Accessories
This accessory is exclusively intended for the Micro-Ohmmeter C.A 6292 from Chauvin Arnoux. It is not suitable for other measuring instruments or other models from the manufacturer, as the connection types and measurement methods are specifically matched to the device. Use with other devices may lead to incorrect measurement results or damage.

Installation and Mounting
Installation is carried out by directly connecting the screw terminals to the corresponding measurement points on the object to be tested. The terminals are designed to be tightened without tools, with a secure connection ensured by turning the terminals. The cable length of 6 meters allows flexible positioning of the measuring device relative to the test object. It is important to observe the color coding (red/black) to ensure correct assignment of current and voltage supply lines.

Operational Advantages
Using this accessory enables significantly higher measurement accuracy for very low resistances, as contact and lead resistances are eliminated. The robust design of the screw terminals ensures a long-lasting and reliable connection, even under industrial conditions. The cable length of 6 meters provides flexibility for measurements in larger installations or at distributed measurement points. The simple handling without additional tools speeds up the measurement process and reduces error sources from incorrect connections.

Scope of Delivery
The scope of delivery includes 1 set of 2 Kelvin test leads with screw terminal connections in red and black, each with a cable length of 6 meters.