jännitemittausketju

Jännitemittausketju, also known as a voltage measurement chain, refers to the series of components and connections used to measure the voltage of an electrical circuit. This chain begins at the point of measurement within the circuit and extends through the measuring instrument and any necessary signal conditioning or transmission elements to the final readout.

The primary purpose of a jännitemittausketju is to accurately and reliably determine the electrical potential difference between two points. This involves careful consideration of the characteristics of each component in the chain to minimize errors. Key components can include voltage probes, coaxial cables, connectors, amplifiers, filters, and the voltmeter or data acquisition system itself.

Accuracy is paramount in a voltage measurement chain. Factors that can affect accuracy include impedance mismatch between components, noise interference, temperature variations, and the inherent limitations of the measuring instruments. For precise measurements, a low input impedance of the measuring device is often desired to avoid drawing significant current from the circuit under test, which could alter the voltage being measured. Conversely, in some high impedance circuits, a high input impedance is crucial.

Signal conditioning may be integrated into the chain to amplify small signals, attenuate large signals to a measurable range, or filter out unwanted frequencies. Data transmission can occur through analog or digital means, with digital systems often incorporating analog-to-digital converters (ADCs) as part of the chain. The overall performance of the jännitemittausketju is a composite of the performance of its individual parts.