Fluke 325 True RMS Clamp Meter, 400A AC/DC, CAT III 600V / CAT IV 300V

The Fluke 325 True RMS Clamp Meter is a professional-grade diagnostic tool engineered for high-performance electrical measurements in demanding environments. As the flagship model of the 320 series, it combines True RMS technology with a compact, rugged design, allowing technicians to obtain accurate readings in confined spaces. This device is built to withstand rigorous daily use while providing the reliability and precision required for complex electrical troubleshooting and maintenance tasks.

Advantages

The primary benefit of the Fluke 325 is its ability to deliver noise-free, accurate measurements even in challenging industrial conditions. Its ergonomic design ensures comfortable handling, while the large, backlit display allows for easy reading in low-light environments. By supporting both AC and DC current up to 400A, it offers exceptional versatility for a wide range of applications. Furthermore, the inclusion of advanced features such as temperature, capacitance, and frequency measurement makes it an all-in-one solution for professional electricians who need to verify circuit integrity and equipment performance quickly and safely.

Suitable for

• Troubleshooting electrical circuits in residential and commercial buildings
• Verifying load current and AC voltage
• Testing continuity of switches, fuses, and electrical contacts
• Measuring frequency for portable generator diagnostics
• Testing DC current in battery backups and solar storage systems

When it may not be suitable

This clamp meter is not designed for high-voltage applications exceeding its CAT III 600V and CAT IV 300V safety ratings. It is also not intended for use in environments where the current exceeds 400A, as this would exceed the measurement range of the device.

Key specifications

• AC/DC current measurement up to 400A
• True RMS measurement for accurate readings on non-sinusoidal signals
• Safety ratings: CAT III 600V and CAT IV 300V
• Integrated temperature, capacitance, and frequency measurement functions
• Large backlit display for improved visibility
• Compact and rugged housing for field use

How to use

To use the Fluke 325, first ensure the device is set to the appropriate measurement mode using the rotary dial. For current measurements, open the clamp jaws and enclose a single conductor. Ensure the jaws are fully closed for an accurate reading. For voltage, resistance, or other functions, connect the provided test leads to the input jacks and touch the probes to the circuit points. Always observe the safety ratings and ensure the device is not exposed to voltages beyond its specified limits.

What to consider before purchase

• Verify that the 400A measurement range is sufficient for your specific electrical equipment
• Ensure the CAT III 600V / CAT IV 300V safety rating meets the requirements of your work environment
• Confirm that the specific functions, such as temperature and capacitance, align with your daily diagnostic needs

Usage recommendations

Regularly inspect the test leads for signs of wear or damage before each use. Keep the clamp jaws clean and free of debris to ensure accurate current readings. Store the device in a protective case when not in use to maintain its calibration and longevity.