Eigenschaften
Continuity with buzzer, test current	≤ 1 mA
Dimensions / weight	163 x 64 x 40 mm / 210 g

The two-pole voltage tester CA 762 from Chauvin Arnoux is a specialised measuring instrument for verifying de-energisation in electrical installations. It serves qualified electricians as a reliable tool for safely carrying out work on power distribution networks, particularly in the CAT IV 600 V category. The device complies with standard IEC 61243-3 Edition 3 and is suitable for use in indoor and outdoor installations, with the housing providing IP65 protection, meaning it is dust-tight and protected against water spray. The test probes are optionally available in IP2X configuration, providing additional operator safety, especially in countries where this is legally required.

Applications

The CA 762 is primarily used for voltage testing to confirm actual de-energisation before working on electrical installations. It is suitable for installations up to 690 V AC (frequency range 16 2/3 Hz to 800 Hz) and 750 V DC. In addition, it enables single-phase live conductor detection, rotation direction indication up to 400 Hz, and continuity testing. These functions make it a versatile tool for inspections, maintenance work, and testing of sockets and wiring.

Functions and Equipment in Detail

The device features a complete self-test that checks the electrical circuits, power supply, displays, and condition of the test leads. This ensures the device is fully functional before each use. Voltage detection is indicated via LED displays, with polarity of AC and DC voltages automatically recognised and displayed. A red ELV-LED (Extra Low Voltage) serves as a redundant safety system: it flashes when voltage exceeds 50 V AC or 120 V DC, and the flash frequency increases with rising voltage. Continuity testing is indicated both audibly and visually for resistance below 100 Ω (typical, max. 150 Ω). Additionally, the CA 762 offers extended continuity testing with optical indicators for resistances below 2 kΩ, 60 kΩ, and 300 kΩ.

Technology Explained Simply

Voltage detection is performed with an impedance of over 400 kΩ, drawing only a minimal current of up to 3.5 mA RMS to avoid loading the system under test. The frequency ranges include DC as well as AC voltages from 16 2/3 Hz to 800 Hz. Phase/neutral identification depends on voltage level: above 120 V for frequencies between 45 and 65 Hz, and above 400 V for frequencies between 16 2/3 and 45 Hz. Rotation direction indication is performed using the two-wire method, allowing testing without requiring an additional hand. The buzzer produces an intermittent beep when voltage is detected and a continuous tone during continuity testing.

Compatibility and Accessories

The CA 762 is equipped with removable test probes and test leads, enabling flexible adaptation to various application scenarios. Compatible accessories include test probes with 2 mm Ø, test leads with 4 mm angled connectors (IP2X), protective caps for test probes, a carrying case, and a CA 753 adapter for testing Schuko sockets. The test leads are rated for voltage category CAT IV 600 V and offer protection up to 1000 V.

Mounting and Installation

Installation is achieved by simply connecting the removable test probes and test leads to the device. The test probes are fitted with springs providing a contact force of 10 N, ensuring reliable contact even when personal protective equipment is worn. The operating temperature range is from -15 °C to +45 °C at a relative humidity of 20 to 95 % RH.

Operational Advantages

The CA 762 offers high operational safety through integrated self-tests and redundant safety systems. The removable components increase flexibility and simplify maintenance. Its compact design, with dimensions of 163 x 64 x 40 mm and a weight of 210 g, makes it ideal for mobile use. Power is supplied by two 1.5-V batteries (LR03), enabling up to 7000 measurements of 10 seconds each. The combination of IP65 housing and optional IP2X test probes ensures safe operation in various environments.

Scope of Delivery

The voltage tester CA 762 is delivered fully assembled and ready for operation. This includes the device itself, removable test probes and test leads, and the operating instructions. The CA 753 adapter for Schuko sockets is available as an optional accessory. Batteries are not included in the scope of delivery.