Yokogawa United Kingdom Ltd – New oscilloscope probes supply expanded capabilities for high-frequency, high-voltage functions

Yokogawa United Kingdom Ltd - New oscilloscope probes offer expanded capabilities for high-frequency, high-voltage applications

November 27, 2020

Yokogawa has launched a new line of high frequency, high voltage differential oscilloscope probes that combine proven features of its existing probes with new functions.

The new line replaces six probes with three, giving design engineers who want to test high performance systems an easier choice.

Recent trends for higher voltages in electric vehicles, railroad inverters, new energy sources (including renewable solar energy), and commercial high voltage lines (such as 400 Vrms) have indicated the need for oscilloscope probes that can handle these high voltages.

Building on the proven 701927, the 701977 is designed for the evaluation of inverters, including 3.3 kV inverters with railway drive, as well as for the measurement of high-voltage surge waveforms.

The 701977 offers a maximum input voltage of 7,000 V peak at 50 MHz with a damping ratio of 100: 1/1000: 1. Black and red high-voltage alligator clips are included as standard.

Another development of the 701927, the 701978, meets the requirements of high-voltage photovoltaic systems with renewable energy. The 701978 offers a maximum differential voltage of 1,500 V at 150 MHz and a damping ratio of 50: 1/500: 1. The new probe offers the same accessories as the existing 701927 – Pinchertip (red, black), a 1 m long extension cable, a 100O resistor adapter and a 150O resistor adapter.

Both probes are powered by the power connector of DLM oscilloscopes or by a separate external power supply and use BNC connectors.

The 701925 is a new high frequency differential probe. It offers a bandwidth of 500 MHz and a wide input voltage range of +/- 35 V with a damping ratio of 50: 1. This makes the probe ideal for measuring high-speed floating and differential signals such as CAN FD, which enables large voltage peaks to be measured accurately can, which is difficult to achieve with existing differential probes.

The accessories are included with the 701924 and include 10 cm wire pairs, 5 cm pair wires, a red and black microclip, and a 6 cm ground extension cord. The 701925 is powered by the Yokogawa probe interface from DLM oscilloscopes.

Two new current probes will also be presented, which offer a wide range in combination with highly sensitive current measurement.
The 702915 and 702916 are three-range current probes designed for low current measurement in consumer product, IoT device and automotive systems development. The new probes offer ten times the sensitivity of conventional current probes and a higher signal-to-noise ratio (SNR) than existing products.

The bandwidth of the 702915 is DC to 50 MHz (-3 dB), while that of the 702916 DC is to 120 MHz (-3 dB). With three ranges – 0.5 A, 5 A and 30 A – the probes allow a single instrument, an oscilloscope or a Yokogawa ScopeCorder to analyze all current levels from standby to inrush current.

This makes the probes ideal for many power measurement applications, from measuring the standby current of household appliances, auto parts such as control devices and industrial equipment, to measuring power consumption and standby current for IoT devices with low power consumption, to controlling signal currents and inrush currents of motors and industrial plants.

For example, by combining the high sensitivity of the Yokogawa DLM5000 and the new probes, manufacturers can measure very low currents of less than one milliamp and analyze the extremely low standby currents found in keyless vehicle entry systems.

“These new probes take our already great products to the next level,” said Terry Marrinan, Yokogawa’s Vice President Test & Measurement for Europe and Africa.

“Manufacturers who need accurate testing of high voltage, high frequency signals, or precise monitoring of very low currents, now have the features they need for convenient, easy-to-use probes. These tools make it easy for manufacturers to test a wide range of products to meet the needs of new industries and consumers. ”

Further information on the differential probes can be found at:

Further information on the current probes can be found at:

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