General
Memory size	2 MB

The Chauvin Arnoux CA 922 HandScope is a portable, multifunctional measuring instrument that combines an oscilloscope, TRMS digital multimeter, and harmonic analyser in a compact housing as a 3-in-1 solution. It is specifically designed for field use, where fast, safe, and precise diagnosis of electrical systems is required. The device features two isolated channels with a bandwidth of 20 MHz each, enabling measurement of AC/DC voltages, currents, resistances, capacitances, frequencies, and power. Measurement data can be transmitted to a PC via an isolated USB interface with SCPI protocol, with the associated SX-METRO software enabling remote control and data analysis.

Applications

The CA 922 HandScope is suitable for a wide range of applications in electrical engineering and maintenance. It is particularly used for diagnosing electrical systems, maintaining drive systems, and investigating network disturbances. The isolated channels allow safe measurements without additional protective measures. The integrated harmonic analysis up to 31 orders (fundamental frequency between 40 and 450 Hz) enables assessment of power quality. Pulse width modulation (PWM) measurement is also possible, with the waveform displayed in oscilloscope mode.

Functions and Equipment in Detail

The device features a 3.5-inch colour LCD display with LED backlighting, which remains clearly readable even in low light conditions. Operation is performed via intuitive buttons on the front panel, which are also operable with gloves. A multilingual interactive help function supports the user during operation. Measurement functions include automatic amplitude, time, and phase measurements, as well as MATH functions such as addition, subtraction, multiplication, division, and inversion. The Autoset function stabilises the display within less than 5 seconds for frequencies above 10 Hz. Additional tools such as Peak Detect, averaging (AVG), and zoom function support analysis of fast or noisy signals.

Technical Explanation

The two isolated channels allow simultaneous measurement at two different points in a circuit without galvanic contact between the channels, increasing safety during measurements on conductive parts. The TRMS multimeter measures true RMS voltage and current, regardless of the waveform shape, which is essential for accurate measurements on non-sinusoidal signals. Harmonic analysis captures harmonics up to the 31st order, which is helpful for evaluating network disturbances and power supply quality. The USB interface with SCPI protocol enables communication with a PC, allowing data to be recorded, stored, and analysed.

Compatibility and Accessories

The CA 922 HandScope can be extended with various accessories to meet specific requirements. These include a set of 4 NiMH batteries, a fast charging set (fast charger + 4 NiMH AA batteries), an optical USB cable, a tweezer for SMD components, acquisition software, a set of 2 magnetic probe tips (red/black, 4A, 1000V CAT III / 600V CAT IV), a measurement set for oscilloscopes (probe 1/10, BNC/4mm plug adapter, 2 cables, 2 test probes), a PWM measurement set, and a power/charger unit for HandScope B. The PWM measurement set includes a low-pass filter MLI01 and an AC/DC current clamp E27, specifically designed for measuring control signals on electric drives.

Mounting and Installation

The device is designed for handheld use. A supplied carrying pouch and a magnetic folding stand allow the device to be attached to metal enclosures. Operation is via front panel buttons, which are also operable with gloves. Power is supplied by NiMH batteries, which can be charged via a USB charger. The LED backlight of the display is energy-efficient, allowing measurements to be performed even during charging.

Operational Advantages

The CA 922 HandScope offers high flexibility by combining an oscilloscope, multimeter, and harmonic analyser in one device. The isolated channels increase safety during measurements. Intuitive operation and interactive help reduce training time. Data transmission via USB enables detailed analysis on a PC. The portable design and magnetic folding stand facilitate field use. The integrated SX-METRO software supports remote control and documentation of measurement results. The device complies with eco-design principles and is delivered with a 3-year warranty.