Eigenschaften
AC/DC/AC+DC current	6000 µA / 60,00 mA / 600,0 mA / 6,000 A / 10,00 A (20A/30s)
Dimensions / weight	90 x 190 x 45 / 400 g

The Chauvin Arnoux CA 5277 is a TRMS digital multimeter for precise measurement of AC and DC voltages and currents in industrial and craft applications. The device features a compact, shock-protected housing with a foldable stand bracket and is designed for use in maintenance, testing, and analysis of electrical systems. It offers comprehensive functionality with true RMS measurement (TRMS) for AC/DC signals, enabling reliable detection of distorted or disturbed signals.

Applications
This multimeter is suitable for maintenance work on electrical installations, checking safety functions such as flame supervision, and diagnostics in electrical engineering. The measurement of ionization currents in the range of 0.2 µA to 20.0 µA enables testing of burner control systems. The high resolution of 10 µV and 1 µA, along with measurement ranges up to 1000 V voltage and 10 A current, makes it a universal tool for electrical specialists.

Functions and Equipment in Detail
The device features a dual backlit digital display with 6000 points each, ensuring high readability even in poor lighting conditions. An integrated bar graph indicator with 63 bi-modal elements supports visual orientation, with options for full-scale or center-zero display. The measurement rate is 5 readings per second, enabling fast and continuous signal tracking. Additional functions include display hold (HOLD), min/max value indication (100 ms), peak +/- indication (1 ms), and differential and relative measurement (ΔX, ΔX/X%).

Technology Explained Simply
TRMS measurement (True Root Mean Square) captures the actual RMS value of AC and DC voltages, regardless of signal shape. This is particularly important for non-sinusoidal signals, such as those found in modern electronic devices. The 12-bit ADC ensures high resolution and accuracy. The VLowZ function (low impedance) with integrated low-pass filter prevents measurement errors caused by parasitic capacitances and enables precise measurements on loads with low impedance. The safety category CAT IV 600 V / CAT III 1000 V ensures safe use in high-voltage environments, while the protection rating IP54 is dust- and splash-proof, allowing use outdoors or in damp environments.

Compatibility and Accessories
Various accessories are compatible with this multimeter, including test leads with 4 mm connectors in different configurations (straight, angled, with test probes), alligator clips, thermocouple adapters for Type K temperature sensors, and special sensors such as SK11, SK13, SK14, and SK15 for different temperature ranges. A multi-purpose magnetic holder and a carrying case support mobile use. The test leads are rated for CAT IV 1000 V and are made of silicone or PVC, making them suitable for high voltages and temperatures.

Mounting and Installation
The device is connected directly to the conductors to be measured, with the test leads plugged into the multimeter's inputs using the appropriate connectors. The measurement function is selected via the control buttons on the device. Power supply is via a 9V battery (type 6LR61), which is included in the delivery. The user manual is also included in the delivery.

Operational Advantages
The combination of high accuracy, fast measurement rate, and comprehensive functions such as differential and relative measurement simplifies diagnostics and maintenance. The IP54 protection rating and CAT IV safety category increase safety when working on electrical installations. The integrated bar graph indicator supports quick visual orientation, while the dual digital display shows precise values. Automatic and annual calibration ensures long-term measurement accuracy.

Delivery Contents
The device is delivered with test leads, a 9V battery, and the user manual.