Eigenschaften
Impedance	10 MΩ
Dimensions / weight	180 x 52 x 45 mm / 200 g

The digital multi-voltage tester CA 755 from Chauvin Arnoux is a compact, robust measuring instrument for professional use in electrical engineering, heating and air conditioning technology, as well as for maintenance work. The device combines the functions of a voltage tester with those of a multimeter and enables automatic detection of direct and alternating voltages, resistances, diodes, and capacitances. Operation is via a rotary switch that supports one-handed use, and the device features a large, backlit LCD display with 3000 points, showing measured values, function symbols, and battery status.

Applications

The CA 755 is suitable for various applications in the field of electrical installation and maintenance. These include voltage and continuity tests in electrical systems, resistance and capacitance measurements on cables, motors, and transformers, as well as diode tests for circuit analysis. The non-contact voltage detection allows recognition of voltages below 230 V at 50/60 Hz from a distance of approximately 5 cm, which is particularly useful in safety-critical environments. The indication of dangerously high voltages supports safe work on the device.

Functions and Equipment in Detail

The device automatically detects the measured quantity — whether direct voltage, alternating voltage, resistance, diodes, or capacitance — and automatically selects the appropriate measurement range. Voltage measurement covers a range from 3 mV to 1000 V DC and from 100 mV to 1000 V AC, each in four ranges. Resolution ranges from 1 mV to 1 V. For resistance measurements, a range from 0.3 Ω to 30 MΩ is available, divided into six ranges, with a resolution from 0.1 Ω to 0.01 MΩ. Capacitance measurement ranges from 400 pF to 30 mF, with a resolution from 0.001 nF to 0.01 mF. Continuity testing is performed acoustically at a resistance value of up to 30 Ω. A diode test is also integrated.

Technology Explained Simply

Measurement is performed with an input impedance of 10 MΩ, ensuring high accuracy in voltage measurement. Power supply is via two 1.5 V LR03 batteries, enabling up to 100 hours of autonomy when using alkaline batteries. After 10 minutes of inactivity, the device automatically switches to standby mode. The housing is protected to IP54 standard against dust and splashing water and can survive a drop from up to 2 meters without loss of function. Double insulation and protection against overvoltages up to 6 kV during voltage testing increase user safety.

Compatibility and Accessories

Compatible accessories include removable test probes in various versions (e.g., CAT III/IV, Ø 2 mm and Ø 4 mm, CAT II), a multifunctional magnetic holder Multifix, hook-and-loop straps, and a transport bag with dimensions 120 x 200 x 60 mm. The removable test probes can be attached to the housing and are easily interchangeable to use the appropriate models for each measurement. The test probes are suitable for use in CAT III networks, increasing safety during measurements in electrical systems.

Mounting and Installation

The device is designed for mobile use and requires no mounting. The test probes are simply inserted into the designated holders on the housing. Operation is via the rotary switch, which selects the various measurement functions. The display is clearly structured and allows for quick reading of values, even in poorly lit environments, thanks to the backlight.

Operational Advantages

The CA 755 offers high safety by complying with standards 600 V CAT III, CEI 61010-1, CEI 61010-031, CEI 61010-032, and CEI 61010-033. Automatic functions such as range selection and detection of the measured quantity reduce the risk of errors. The combination of voltage tester and multimeter functions in a single device increases work efficiency. The robust construction and IP54 protection rating make the device suitable for outdoor use or in damp environments. The integrated drop protection up to 2 m protects the device in case of accidental falls.

Scope of Delivery

The scope of delivery includes the voltage tester CA 755, removable test probes, and the operating instructions.

Standards and Safety Features

The device meets the measurement category 600 V CAT III and the standard IEC 61010-2-033 for multimeters. The IP54 protection rating ensures protection against dust and splashing water. Double insulation and protection against voltage surges up to 6 kV during voltage testing increase user safety. The indication of dangerously high voltages supports safe work on the device.