Agitek service Keithley maintenance---How much do you know about Keithley source meters?

From college graduates to university professors, from physical material scientists to electronic device researchers, from semiconductor device engineers to electronic R&D engineers, from hardware engineers to reliability test engineers, all of them may use source meters, and Keithley source meters are particularly popular among customers. So do you really understand source meters? What is a "source" and what is a "meter", do you know? Today, Antai Testing will give you a brief introduction:

Source and Table:

"Source" refers to voltage source and current source, and "meter" refers to measurement meter;

"Sourcemeter" refers to a measuring instrument that can act as a four-quadrant voltage source or current source to provide accurate voltage or current, and can simultaneously measure current or voltage values.

The digital source meter combines the functions of voltage source, current source, voltmeter and ammeter in one, and can be widely used in the measurement of various precision devices.

1. Four quadrants: The power quadrant refers to a quadrant diagram formed by the power supply output voltage as the X-axis and the output current as the Y-axis. The first and third quadrants are when the voltage and current are in phase, and the device supplies power to other devices, which is called the source mode; the second and fourth quadrants are when the voltage and current are in reverse phase, and other devices discharge to the device, passively absorb the inflowing current, and can provide a return path for the current, which is called the hydrazine mode;

2. Resolution: The minimum change in the input signal that can cause the output signal to change. The minimum value that can be directly read in the measured value;

3. Source limit: the limit range of voltage or current. Since the power of the source meter is limited, its maximum output current or maximum output voltage will be limited in the high voltage or high current range;

4. Channel: A set of source meters with complete functions is a channel. Currently, the PUCIS desktop source meters only provide single channels. If multiple channels are required, a plug-in source meter can be selected.

5. Accuracy: The deviation between the actual output signal and the ideal output. Generally expressed as gain error + offset error;

6. Noise: The AC stray components of the DC power supply output are called ripple and noise. The AC periodic signal in the output is ripple, and the noise is random. When comparing parameters, pay attention to keywords such as bandwidth, peak-to-peak value, and effective value;

7. Output settling time: the time required for the output signal to reach the expected stable value;

8. Capacitive load stability: The stability of the device when the DUT is a capacitive load;

9. Range change overshoot: the magnitude by which the output value deviates from the ideal value at the moment of range switching;