A resistance technique using separate current and sense connections to eliminate lead and contact resistance, essential for accurate low-resistance readings.

An electronic system or circuit that converts a continuous analog signal into a discrete digital representation for processing by computers or digital systems.

A formal test performed to determine whether a system or component satisfies specified acceptance criteria, carried out before delivery to the customer.

The closeness of a measurement or calculated value to the true or accepted reference value, representing the absence of systematic error or bias.

A data acquisition card that captures analogue voltage signals from sensors or device outputs and converts them to digital data for processing.

The temperature of the air in the surrounding environment, typically measured as the current air temperature of a specific location or around a component.

A continuous electrical signal that represents information through infinitely variable physical quantities, such as voltage, current, or frequency, typically forming a smooth and non-ending curve over time.

A statistical method used to compare the means of three or more groups by analyzing the ratio of variance between groups to the variance within groups (F-statistic) to determine if at least one group mean is significantly different.

A camera-based automated quality control process that visually inspects products (e.g., PCBs) for defects such as missing components, solder issues, or misalignment.

A structured framework for developing automotive products and processes through defined planning phases to ensure customer requirements are met.

A risk classification (A to D) defined by ISO 26262, specifying safety requirements based on hazard severity, exposure, and controllability.

A sequential manufacturing setup where a product is progressively built at consecutive workstations, each performing a defined assembly operation.

Single-pair Ethernet variants used for high-bandwidth in-vehicle data such as camera, radar, and infotainment traffic.

The maximum capacity of a network or communication channel to transfer data within a specific time frame, typically measured in bits per second (bps) or hertz (Hz).

The difference between the expected value of a measurement or estimator and the true underlying value, representing a systematic error rather than random variation.

Circuitry designed into a device that lets it test its own operation, reducing the need for external test equipment and enabling in-field diagnostics.

A technique accessing component pins via a dedicated serial interface, enabling connection and functional testing of digital devices without physical probes.

The closeness of a measurement or calculated value to the true or accepted reference value, representing the absence of systematic error or bias.

The process of configuring a measurement instrument to produce results matching a known reference standard, ensuring accuracy and traceability.

A robust automotive serial bus (ISO 11898) that lets ECUs communicate without a host computer, widely used for in-vehicle networking and as a test interface to the DUT.

An extension of CAN offering higher data rates and larger payloads per frame, used in modern high-bandwidth automotive architectures.

A higher-layer protocol built on CAN, providing standardised device profiles and object dictionaries for industrial and embedded control.

A statistical measure of how well a process or product can consistently produce outputs that stay within defined specification limits or requirements. Measured using indices such as Cp and Cpk, it compares natural process variation to allowable tolerances to quantify the risk of defects and the ability to meet customer standards.

A mandatory European conformity mark indicating that a product meets EU safety, health, and environmental protection requirements.

A controlled environment with low levels of pollutants such as dust, airborne microbes, and chemical vapours, used for sensitive manufacturing and testing. Classified per ISO 14644-1.

Cm (Machine Capability Index) and Cmk (Machine Capability Critical Index) are statistical measures used to evaluate a machine's short-term ability to produce outputs within specification limits. Cm measures potential capability by comparing the machine's spread to the tolerance width, while Cmk accounts for the centering of the distribution relative to those limits. Unlike Cp and Cpk, these indices are calculated from a small sample of consecutive parts to isolate machine-specific variation from other process factors.

The ability of a measurement system or differential amplifier to suppress unwanted signals or noise that are common to both input terminals.

The process of installing, configuring, and verifying a test system on the production floor until it is fully operational and formally handed over.

The resistance to the flow of electric current at the interface of two touching conductive surfaces, caused by factors such as surface roughness, contamination, or oxide layers.

The central computing unit (often a PXI-based embedded computer) that runs test sequences, coordinates instruments, and stores test results.

Statistical measures used to evaluate process capability. Cp (Process Capability Index) measures the potential capability of a process assuming it is perfectly centered between specification limits, while Cpk (Process Capability Ratio) accounts for the actual centering of the process mean to provide a more realistic assessment of its ability to meet requirements.

The ratio of the peak amplitude of a waveform to its root mean square (RMS) value, used to indicate the peakiness or distortion of a signal and its potential stress on electrical components.

A mechanical process of joining two materials, typically a wire and a terminal, by deforming one or both components to create a secure, solderless electrical and mechanical connection.

The total time to complete one test or production operation on a single unit; a key driver of station throughput and line balancing.

The reduction or prevention of oscillation in a physical system through the dissipation of energy, typically resulting in a decrease in the amplitude of electrical or mechanical waves over time.

The process of sampling and digitizing real-world signals (voltage, current, temperature, etc.) from sensors or devices under test for analysis and recording.

A rack-based enclosure housing multiple DAQ modules, providing power, cooling, and a high-speed data bus (e.g., PXI) connecting them to the controller.

A band of input values in a control or signal processing system where no output change or action occurs, typically used to prevent oscillation or repeated activation-deactivation cycles.

A specialized piece of software that acts as an interface between the operating system and a hardware component, translating high-level commands into device-specific instructions to enable communication and control.

Design for Manufacturing (DFM) is an engineering practice focused on designing products to reduce manufacturing costs and increase ease of production by simplifying, optimizing, and refining design elements during the early development phases. It involves considering material selection, production capabilities, and standardization to minimize complexity and identify potential fabrication issues before tooling or assembly begins.

Design for Test (DFT) is a design methodology that incorporates specific hardware features—such as scan chains and built-in self-test (BIST) mechanisms—into integrated circuits to ensure they can be efficiently tested for manufacturing defects and verified for quality.

A signal interface used to read or control discrete binary states (on/off, high/low) on a device under test, such as relays, switches, or indicator lines.

A high-density 2D barcode used to uniquely identify and track individual parts through production and test, enabling full unit-level traceability.

A continuous or incremental change over time in an instrument's indication or response due to changes in its metrological properties, independent of changes in the measured quantity or environment.

The product or component being evaluated by the test system. All electrical and mechanical interfaces of the test equipment are designed around the DUT's specifications.

An embedded controller governing one or more electrical subsystems in a vehicle; the typical DUT in automotive end-of-line and functional testing.

Writing firmware or calibration data into an ECU's memory, typically performed at end-of-line to load production software before shipment.

Specialized test and support equipment used to verify, integrate, and operate an (aero)spacecraft or (aero)space instrument while it is still on the ground.

The ability of a device to operate correctly in its electromagnetic environment without causing interference to, or being affected by, other devices. Verified per EU Directive 2014/30/EU.

A shielded enclosure designed to block external electromagnetic signals, used for radiated emissions and immunity testing of electronic equipment.

An undesired electromagnetic disturbance caused by an external source that affects an electrical circuit, potentially degrading performance or causing data loss.

A sensor that converts mechanical position or motion into an electrical signal, providing position feedback for motion control and test-stand alignment.

A functional test performed on every finished product at the end of a production line to verify correct operation before shipment.

A professional CAE software platform used for electrical engineering design, including circuit diagrams, wiring layouts, and component documentation.

A sudden flow of electricity between objects at different potentials. ESD can damage sensitive electronic components; test equipment must comply with IEC 61340-5-1.

A real-time Industrial Ethernet fieldbus system, standardized in IEC 61158, that uses a processing-on-the-fly principle to provide high-speed, deterministic data exchange for automation, control, and measurement applications.

A standard for wired computer networking used to connect devices in a local area network (LAN) or wide area network (WAN), enabling high-speed data exchange via protocols defined in the IEEE 802.3 standards.

An industrial network protocol running the CIP application layer over standard Ethernet, widely used for control and I/O in automation systems.

Electric Vehicle (EV) refers to a vehicle propelled by one or more electric motors using energy stored in rechargeable batteries, while Autonomous Vehicle (AV) refers to a vehicle capable of sensing its environment and operating without human involvement through advanced software, sensors, and control systems.

A design feature or practice that ensures a system inherently responds in a way that causes minimal or no harm to equipment, people, or the environment in the event of a failure.

A structured test at the integrator's site proving a system meets its specification before shipment.

A test that exercises the full or partial functional capabilities of a product to verify that it operates within its specified parameters.

A mechanical device that holds and precisely positions the DUT relative to the test interface, ensuring repeatable and reliable electrical contact during testing.

A deterministic, fault-tolerant automotive bus for high-speed, safety-critical applications such as x-by-wire systems.

A systematic method for identifying potential failure modes, assessing their effects and likelihood, and prioritising corrective actions.

A sensor, also known as a load cell or force transducer, that converts mechanical force—such as tension, compression, or pressure—into a measurable electrical signal for monitoring and analysis. Most cells utilize strain gauges bonded to a metal body that deform under stress, causing a proportional change in electrical resistance.

The proportion of units passing all tests on the first attempt without rework; a core quality indicator.

A statistical MSA method that quantifies the variation in a measurement system caused by the gauge itself (repeatability) and by different operators or conditions (reproducibility).

A finalized, customer-approved product sample produced using the same materials and processes as mass production. It serves as the master reference model and quality benchmark for evaluating all future production units during testing and inspection.

A standard parallel interface bus used to connect and control programmable test instruments such as multimeters, oscilloscopes, and signal generators.

A statistical MSA method that quantifies the variation in a measurement system caused by the gauge itself (repeatability) and by different operators or conditions (reproducibility).

A margin subtracted from the specification limits to account for measurement uncertainty, reducing the risk of accepting out-of-tolerance product.

A bundled assembly of cables and connectors that forms the electrical interconnection between the DUT and the test system. Must be designed for RF performance, shielding, and mechanical durability.

A real-time test method where a controller (e.g. an ECU) is connected to a simulated model of the system it controls, validating its behaviour against virtual sensor and actuator signals without the physical plant.

An electrical safety test, also known as a dielectric withstand test, that applies a high voltage to a component to verify insulation integrity and ensure no current leakage or breakdown occurs.

The operator-facing interface of a test system, typically a monitor, keyboard, and mouse connected to the controller, used to start tests, monitor status, and access results.

A reliability stress test where a device is operated at elevated temperature and voltage to accelerate failure mechanisms and assess long-term reliability.

The dependence of a system's output on its current input and its history of past inputs, typically manifesting as a lag in response or a difference in measurement values depending on whether the input is increasing or decreasing.

The global automotive quality management standard, built on ISO 9001, defining requirements for defect prevention and continual improvement across the supply chain.

A method using a bed-of-nails fixture to electrically probe individual components on a populated PCB, verifying placement, orientation, and value.

International standard for the safety of machinery with respect to electrical equipment, covering design requirements for control circuits, protective devices, and grounding.

International standard specifying requirements for the protection of electronic components from electrostatic discharge in manufacturing and handling environments.

The effective total opposition that a circuit or component offers to the flow of alternating current (AC), consisting of the combined effect of ohmic resistance and reactance.

A test measuring insulation resistance between conductors under DC voltage to confirm leakage stays within safe limits.

An international standard that provides a comprehensive framework and general principles for the design of safe machinery, outlining a systematic methodology for risk assessment and risk reduction throughout the machine life cycle.

International standard defining cleanliness classes for clean rooms based on airborne particulate concentration, ranging from Class 1 (cleanest) to Class 9.

International standard specifying the general requirements for the competence of testing and calibration laboratories, ensuring measurement traceability.

The international standard for functional safety of electrical/electronic systems in road vehicles, covering the full safety lifecycle.

A two-wire synchronous serial bus for short-distance communication between ICs on a board, commonly used to configure and read sensors on a DUT.

A graphical programming environment by NI used to develop measurement, data acquisition, and instrument control applications through a visual dataflow programming paradigm.

A switchable protection circuit placed between a power source and a load that trips off after detecting overcurrent, protecting sensitive devices such as space instruments.

A test verifying the sealing integrity of a component or enclosure via pressure decay or tracer-gas flow against a defined leakage threshold.

A low-cost single-wire serial bus (ISO 17987) for simple subsystems such as window and mirror controls, often tested alongside CAN.

The maximum deviation of a sensor's or instrument's actual output from an ideal straight-line relationship over its specified measurement range, typically expressed as a percentage of the full-scale output.

An electrical network placed between the mains supply and a DUT during EMC testing to provide a defined, stable source impedance and isolate conducted emissions.

The Lower Specification Limit (LSL) and Upper Specification Limit (USL) are the minimum and maximum values allowed for a product or process to meet customer requirements. If a measured value falls between the LSL and USL, the product is considered to meet specifications and passes; values outside these boundaries are classified as defects or failures.

A mandatory European Union directive that sets essential health and safety requirements for the design and construction of machinery to ensure the protection of workers and consumers while promoting free movement within the single market. It requires manufacturers to perform risk assessments, ensure conformity with technical standards, and affix the CE marking to finished products before they are placed on the market.

A structured, documented sequence of all production and assembly phases, including design, procurement, manufacturing, testing, and delivery, used for project planning and traceability.

A quantified doubt about a measurement result, expressing the range within which the true value is expected to lie; essential for stating conformance to tolerances.

A shop-floor software layer that manages and tracks production, exchanging work orders, results, and traceability data with test stations.

A simple, open serial/Ethernet protocol (Modbus RTU/TCP) for master–slave communication between industrial devices such as PLCs, meters, and sensors.

A high-precision frequency reference source used in RF and timing applications, where long-term stability and low phase noise are critical requirements.

A set of statistical methods used to evaluate and qualify a measurement system's performance — including repeatability, reproducibility, bias, linearity, and stability.

A rugged, modular instrumentation platform by National Instruments based on the CompactPCI standard, used to build scalable test systems from plug-in measurement modules.

A test management and sequencing software environment by NI that organizes and executes test steps, manages flow control, logs results, and interfaces with instruments and code modules.

The measurement and analysis of a product's acoustic and vibration behaviour (e.g. an e-motor or drivetrain) to characterise sound quality and detect mechanical defects.

A standardised vehicle self-diagnostic system that reports the operational status and fault codes of subsystems, accessed via a defined connector and protocol.

A precision frequency reference in which the crystal and oscillator circuit are maintained at a constant temperature to minimize frequency drift.

A composite metric combining availability, performance, and quality to quantify how effectively a machine or line is utilised.

A platform-independent, service-oriented communication standard (IEC 62541) for secure, interoperable data exchange between industrial systems up to the MES/enterprise level.

A commercially available standard component or instrument purchased from a supplier rather than custom-designed, used to reduce cost and ensure supportability.

A condition where the current drawn from an electrical circuit exceeds its rated capacity, leading to excessive heat, potential damage to insulation or components, and the triggering of protective devices like circuit breakers or fuses.

An automated transport system used in production lines where products are carried on standardised pallets between workstations, enabling precise positioning and return transport.

The binary outcome of a product test: Pass (PASS) indicates all measured values are within specification; Fail (FAIL) indicates one or more out-of-tolerance results, triggering further action.

A laminated board with conductive copper tracks that mechanically supports and electrically connects electronic components. The core building block of most electronic assemblies.

A rack-mounted unit that distributes incoming mains power to multiple individual outputs with circuit breakers, switches, and protective devices.

A measurement mode that captures and retains the maximum value of a signal encountered during a measurement period, updating only when a new, higher peak is detected.

The angular difference between two periodic electrical waveforms, typically voltage and current in an AC system, expressing how much one leads or lags the other in degrees or radians.

An instrument that measures the frequency stability of an oscillator by characterizing noise sidebands around the carrier frequency, expressed in dBc/Hz.

An industrial computer controlling machinery through real-time logic, handling I/O, timing, and interlocks in automated test and production systems.

A quality-control method used to measure the tensile force required to extract an anchor, fastener, or crimped connector from its base material or housing to verify installation quality and structural integrity.

An error-proofing design principle that prevents or immediately detects mistakes, commonly built into test fixtures and handling systems.

The precise mechanical alignment of a product on a test stand according to prescribed tolerances. Correct positioning is one of the three pillars of test system validation.

The ratio of real power (working power) to apparent power (total power supplied) in an AC circuit, representing how effectively electrical power is converted into useful work.

A standardised procedure demonstrating that a supplier's process can consistently produce parts meeting customer requirements before series production.

An electrical connector pin that is pressed into a PCB hole without soldering, creating a reliable gas-tight connection through mechanical interference.

A serial fieldbus (IEC 61158) connecting controllers to sensors and actuators in industrial automation; the predecessor to PROFINET.

An open Industrial Ethernet standard (IEC 61158/61784) for real-time data exchange between controllers and field devices in factory and process automation.

An instrument or module that provides a controlled, programmable DC voltage and current output to power the device under test during testing.

A modular electronic instrumentation platform based on PCI/PCIe, offering high data throughput, precise synchronization, and a standard form factor for test instrument modules.

The span between the minimum and maximum values that a sensor, instrument, or system can measure or operate within while maintaining specified performance and accuracy.

The closeness of agreement between the results of successive measurements of the same measure carried out under the same conditions, including the same operator, instrument, and location over a short period of time.

The smallest change in a physical quantity that a measurement system or instrument can detect and faithfully indicate.

The portion of the electromagnetic spectrum used for wireless communication and precision oscillator signals, typically in the range of 3 kHz to 300 GHz.

An electronically controlled switching matrix that routes RF signals from multiple DUT outputs to a single measurement instrument input.

A formal document issued by a customer asking suppliers to provide pricing and technical proposals for a defined scope of work.

A systematic process of identifying, evaluating, and prioritizing potential hazards and failure modes—such as equipment malfunctions, human error, or safety risks—to implement control measures that mitigate impact and ensure the reliability of manufacturing and testing operations.

The square root of the mean of the squares of a set of values or a continuous waveform, representing the effective value of a time-varying signal such as AC voltage or current.

A standard for serial communication introduced in 1960 that defines the electrical, functional, and physical interface for point-to-point data exchange between a computer (DTE) and a peripheral (DCE), such as a modem or test instrument. It typically supports data rates up to 20 Kbps over distances up to 50 feet using DB-9 or DB-25 connectors and is characterized by its use of positive and negative voltage levels for binary signaling.

A test at the customer's site after installation, confirming correct operation in the intended production environment.

A control architecture that supervises industrial processes, aggregating data from PLCs and instruments for operators.

A standardised ASCII command syntax for controlling programmable test instruments over GPIB, LAN, or USB.

A dedicated hardware subsystem used to verify the correct operation of a test system itself before it is used to test actual products.

The ability of a test to correctly identify the presence of a specific condition or defect, measured as the proportion of true positive results out of all actual positive cases.

The desired or target value for a specific variable or parameter that a control system aims to maintain.

A precision low-value resistor placed in a circuit to measure current indirectly by sensing the voltage drop across it.

An electronic device or circuit that manipulates a raw analog signal from a sensor—through amplification, filtering, isolation, or linearization—to make it compatible, accurate, and safe for a data acquisition system or controller.

A measure of the reliability required of a safety function (per IEC 61508), used in industrial machinery and process safety to quantify acceptable failure probability.

A precision instrument that simultaneously sources voltage or current and measures the resulting current or voltage, used for both powering and characterizing DUT channels.

A synchronous serial communication protocol commonly used for short-distance communication between a controller and peripheral devices such as sensors, ICs, and data converters.

The ability of a measurement system or instrument to maintain consistent metrological properties and accuracy over an extended period, typically evaluated by monitoring changes in bias or drift through the use of control charts and master samples.

A configurable array of relays or solid-state switches that routes signals between multiple test instruments and multiple DUT points, maximising instrument reuse.

The available production time divided by customer demand, defining the pace at which units must be completed to meet delivery targets.

A structured document recording the circumstances, instruments used, individual measurements, and pass/fail outcomes of a test or validation activity, providing traceability.

A defined, ordered series of measurement and control steps executed automatically by the test software, ensuring that all required tests are performed under the correct conditions.

A document defining what and how to test a product, including required measurements, tolerances, test conditions, and acceptance criteria.

The ability to track a measurement result back through a documented chain of calibrations to a national or international measurement standard.

A measurement method that accurately calculates the effective heating value of any AC waveform, including distorted or non-sinusoidal signals, by computing the square root of the average of the squared instantaneous values.

A diagnostic protocol (ISO 14229) used to read fault codes, run routines, and reprogram ECUs during development, production, and service.

A manufacturing process that uses high-frequency ultrasonic vibrations to create a solid-state weld between plastic parts without adhesives or fasteners.

A backup power device that provides emergency power to connected equipment when the main supply fails, allowing controlled shutdown and preventing damage or data loss.

A controlled test enclosure that can simulate space-like conditions — including vacuum pressure and extreme temperatures — used for thermal and environmental qualification testing.

The process of confirming that a test system or process meets its intended purpose and specified requirements, typically covering positioning, MSA, and methodology.

A unit of measurement for reactive power in an AC circuit, representing the electrical power that flows back and forth between the source and the load to maintain electromagnetic fields without performing actual work.

An automated parts-feeding device that uses controlled vibration to orient and deliver bulk components to the next assembly step.

A camera-based measurement or inspection system that captures images of products to verify dimensions, detect defects, read codes, or guide robotic assembly operations.

The SI unit of power, equivalent to one joule per second, used to measure the rate of energy transfer, generation, or consumption.

A calibration setting used to align an instrument's output to its minimum or reference value when the input is at its lowest possible range value, correcting for drift by adding or subtracting a constant offset.