Eigenschaften
AC current	1000 A
AC voltage	1 200 V
Frequency in V / in I	Ja / Ja
Resistance	100 kΩ
Dimensions / weight	92 x 272 x 41 mm 600 g
Automatic ranges (Autorange)
Automatic AC/DC detection
Adapter
Charge development (TrueInrush)

The Chauvin Arnoux F404 is a multimeter clamp with TRMS measurement function for AC and DC current, designed for professional applications in electrical engineering. The device enables precise measurements of current, voltage, resistance, temperature, and other electrical parameters. It is suitable for use in low-voltage installations as well as for maintenance and diagnostics of medium-voltage installations. The clamp features a protection rating of IP54, preventing dust ingress and ensuring long-term stability of the device. Electrical safety complies with standards IEC 61010-1 and IEC 61010-2-032, with a category of CAT IV up to 1000 V and CAT III up to 1500 V.

Applications

The F404 is suitable for maintenance, inspection, and diagnostics of electrical installations, particularly in the electrical industry and for small and medium-sized businesses. It is specifically designed for medium to high current levels, with a measurement range up to 1000 A AC and 1500 A DC. The clamp is frequently used for monitoring motor starts, charging processes, and measuring overcurrents. Temperature measurement via Type K thermocouples extends the application range to applications where thermal conditions must be monitored.

Functions and Equipment in Detail

The device features a backlit LCD with a resolution of 10000 points, enabling clear and precise display even in poor lighting conditions. Automatic range selection (Autorange) and automatic detection of AC/DC currents reduce operating complexity. Frequency measurement is possible for both voltage and current. Additional functions include an audible continuity test, adjustable between 1 Ω and 999 Ω, and a diode test for checking semiconductor connections. Functions such as Min/Max, Hold, RELativ ΔX, and Differential ΔX/X(%) support analysis of measured values over time intervals.

Technology Explained Simply

The F404 operates using the TRMS method (True Root Mean Square), enabling accurate measurement regardless of signal shape. This is particularly important for non-sinusoidal signals, which are common in modern electrical installations. Digital measurement acquisition with 12-bit resolution ensures high resolution and accuracy. The best accuracy is 1 % of the measured value plus 3 digits. Current measurement is performed via a jaw diameter of 48 mm, sufficient for most cable cross-sections. Power supply is via four 1.5 V LR06 batteries.

Compatibility and Accessories

The device is equipped with an adapter for Type K temperature sensors, enabling the use of various thermocouples. Suitable accessories include test leads with 4 mm connectors (straight and angled), test probes, crocodile clips, and various thermocouples such as SK11, SK13, SK14, SK15, SK17, SK19, and SK6. These components extend functionality and allow flexible adaptation to different measurement tasks. A transport case is also available for safe transportation of the device.

Mounting and Installation

The F404 is designed as a handheld device and requires no mounting. Operation is via an ergonomic rotary switch, which can also be operated with protective gloves. The clamp is simply placed around the cable to be measured, with the jaw diameter of 48 mm covering most applications. Automatic functions such as Autorange and AC/DC detection reduce operating steps and increase safety.

Advantages in Operation

The combination of TRMS technology, high safety category, and comprehensive functions makes the F404 a reliable tool for electrical professionals. Automatic functions such as Min/Max, Hold, and RELativ measurement simplify analysis of measured values. The IP54 protection rating and robust construction, which passes a drop test from a height of 2 meters, ensure long service life and safety in use. Temperature measurement extends the application range to applications where thermal conditions must be monitored.

Note: Batteries are not included in the delivery scope.