calibrators

Calibrators are devices or procedures used to establish or verify the accuracy of measurement instruments by providing known reference values or signals. They are used across laboratories, industries, and field service to ensure instruments report correct readings and to support compliance with quality and safety standards.

Common types include electrical calibrators (voltage, current, resistance sources and measurement units); electrical or multifunction process calibrators that simulate sensors and transmitters; temperature calibrators that deliver fixed temperatures or stabilize sensor readings; pressure calibrators that generate precise pressures; and handheld loop calibrators used for field maintenance of instrumentation loops. Some models combine several functions in one unit.

Calibrators rely on traceability to national or international standards. Measurements and references are linked to SI units through a chain of comparisons. Calibration results are documented in a certificate or report, including the measured value, the reference value, the difference (error), and an uncertainty estimate.

Calibration typically involves selecting a reference standard, performing measurements, and applying any necessary adjustment or correction to the instrument under test. It also distinguishes calibration from verification; calibration provides a correction factor and uncertainty, while verification checks that the instrument remains within tolerance without adjustment.

Standards and practice emphasize reliability, safety, and environmental control. Organizations may follow ISO/IEC 17025 or related quality frameworks, with traceability maintained to national metrology institutes such as NIST. Calibrators are essential in laboratories, manufacturing, process control, and maintenance programs.

In asset management, calibration intervals and record keeping help ensure ongoing confidence in measurement results and regulatory compliance.