General
Memory size	2 MB
Multimeter mode memory	2700 Messungen
Screen size	3,5 Zoll
USB interface

The Chauvin Arnoux CA 942 HandScope is a portable, multifunctional measuring instrument that combines an oscilloscope, TRMS multimeter, and harmonic analyzer in a single device, offering a 3-in-1 solution. It is specifically designed for field use, where mobile, reliable, and safe measurement of electrical parameters is required. The device features two isolated channels with a bandwidth of 40 MHz, enabling signal analysis across a wide range of applications, from maintenance of electrical installations to diagnosis of pulse-width modulation in drive technology. The ergonomic design with shock-protected housing and elastomer casing ensures a secure and comfortable grip, even when used with gloves. A 3.5-inch color LCD screen with LED backlighting provides clear and easily readable display of measurement values, even in poor lighting conditions. The integrated, multilingual interactive help simplifies operation and reduces the need for additional documentation.

Applications

The CA 942 HandScope is suitable for use in electrical installation, maintenance of industrial plants, automation technology, and diagnosis of network disturbances. Thanks to the isolated channels, measurements can be performed on electrical installations safely without requiring additional protective measures. Particularly advantageous is its application in analyzing pulse-width modulated (PWM) signals, for example, on speed controllers for electric drives. Measurement data can be transferred to a PC via a USB interface with SCPI protocol, enabling detailed evaluation and documentation of results.

Functions and Equipment in Detail

The device offers three main functions: as an oscilloscope with 40 MHz bandwidth, as a TRMS multimeter with 8000 points per channel, and as a harmonic analyzer measuring up to 31 orders. The oscilloscope function enables waveform display with automatic measurement functions for amplitude, time, and phase. Additional tools such as Peak Detect, averaging (AVG), and zoom function support analysis of fast or noisy signals. The multimeter function measures AC and DC voltages, currents, resistance, capacitance, frequency, and power. Power measurement is performed by combining the two measurement channels. Harmonic analysis covers frequencies from 40 to 450 Hz and enables identification of network disturbances.

Technology Explained Simply

The two isolated channels of the CA 942 HandScope allow independent measurements at different points in an electrical installation without galvanic contact between the channels. This increases safety when measuring live conductors. TRMS measurement (True Root Mean Square) provides precise values for alternating voltages and currents, even with non-sinusoidal signals. The 8000-point resolution ensures detailed representation of measurement values. The USB interface with SCPI protocol enables remote control of the device via PC software, allowing automated measurement sequences and data logging. The integrated memory function stores data on a 2 MB memory, and in multimeter mode, additional graphical recording of up to 2700 measurements over a period of 5 minutes to one month is possible.

Compatibility and Accessories

The CA 942 HandScope can be expanded with various accessories to meet specific requirements. These include a set of 4 NI-MH 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 test probes (red/black, 4A, 1000V CAT III / 600V CAT IV), a test set for oscilloscopes (probe 1/10, BNC/4mm plug adapter, 2 cables, 2 test tips), a PWM measurement set, and a power/charger unit for Handscope B. The PWM measurement set is specifically designed for measuring on pulse-width modulated controllers and consists of a low-pass filter MLI01 and an AC/DC current clamp E27. The SX-METRO software enables remote control and data analysis on a PC.

Mounting and Installation

The device is designed for handheld use. An included shoulder bag and a magnetic folding stand allow attachment to metal enclosures, freeing the hands for other tasks. The control buttons are arranged on the front panel and are easily operable even with gloves. Connections are made via two BNC sockets, enabling universal connection to various measurement accessories. Power supply is via NiMH batteries, which can be charged using a USB charger. The LED backlight is energy-saving, allowing measurements to be performed even during charging.

Operational Advantages

The CA 942 HandScope offers high flexibility by combining three measurement functions in one device. The isolated channels increase safety when measuring live conductors. Intuitive operation with pictograms and interactive help reduces training time. Data transfer via USB with SCPI protocol enables efficient documentation and analysis of measurement results. The integrated memory function and graphical recording in multimeter mode support long-term monitoring. The robust, shock-protected design and ergonomic shape make the device a reliable companion in the field.