Source measure units simulate operation from batteries

December 06, 2013 // By Graham Prophet
Yokogawa's extended GS610 and GS820 family of source measure units now includes the GS610 Model 7655, a battery simulator unit which simulates the internal resistance changes of batteries as an aid to failure analysis, and the GS820 Models 765601/Z and 765602/Z, 50-V output versions for testing higher-voltage components such as LEDs and power transistors.

Yokogawa’s single-channel GS610 and multi-channel GS820 source measure units are high-accuracy, high-speed programmable voltage and current sources that incorporates both generation and measurement functions as well as USB interfaces and USB storage functions.

The instruments feature high power output, with a maximum output voltage and current of 110V and 3.2A, respectively, a basic accuracy of 0.02%, and pulse widths down to 100 µsec. These performance levels, coupled with the fact that the units can operate as current sources or current sinks, suit them to measuring and evaluating the electrical characteristics of a wide range of devices, including semiconductors, secondary batteries, in-vehicle electronic components and displays.

The new 7655 version of the GS610 can measure the current/voltage characteristics of a battery during charging or discharging and then simulate the internal resistance changes of the battery by controlling the output voltage in real time with reference to this characteristic. This makes it possible to simulate low and defective batteries and carry out marginal battery power testing on portable devices such as mobile phones and digital cameras.

The 765601/Z and 765602/Z versions of the GS820 each provide a maximum output voltage of 50V, compared with 18V for the standard version. The maximum current capability of the new models is ±1.2A, compared with ±3.2A for the standard unit.

Applications for the higher-voltage unit include testing LED lighting, power transistors and FET devices, protection devices (varistors and diodes) and voltage regulators. Potential users include both equipment manufacturers and component or sub-assembly manufacturers.