Calibration instruments use electrical signals or physical quantities to calibrate sensors and meters. Devices that produce electrical signals can serve as precise meters for sensor calibration, or send output signals to other devices. Common calibration signals include AC voltage, DC voltage, AC current, and DC current. Calibration instruments that produce a pulse stream, pulse range, or frequency range are also available. Signal and waveform generators are designed to produce a sine wave, square wave, triangular wave, or other predefined waveform. Most manufacturers specify calibration instruments with a range of signal values that includes minimum and maximum amounts. Devices that produce physical quantities are often traceable to national to international standards from the National Institute of Standards and Technology (NIST), Physikalisch-Technische of Bundesanstalt (PTP), National Measurement Accreditation Services of the U.K. (NAMAS), or Bureau Nationale Metrologie of France (BNM).
Selecting calibration instruments requires an analysis of physical, electrical, process, environmental, and thermodynamic properties. Physical properties indicate whether instruments can be used to calibrate devices that sense or measure acceleration, vibration, acoustics, displacement, position, force, load, or torque. Electrical properties indicate whether calibration instruments can be used to calibrate devices that sense or measure attenuation, capacitance, charge, inductance, power, resistance or impedance. Calibration instruments that sense and measure process, environmental and thermodynamic properties are used with many variables. Examples include conductivity, liquid flow, gas concentration, humidity, moisture content, dew point, oxygen reduction potential (ORP), potential hydrogen (pH), and resistivity. Specialized products are used to calibrate resistance temperature detectors (RTD), thermistors, and thermocouples.
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Transcat - Calibrators, Test and Measurement Instruments,... See Transcat Information |
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Calibration Instruments, Calibration Instruments... Dealing into calibration of gas detection equipment, instrumentation calibration, pressure gauge calibration, instrument calibration, load cell |
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National Instruments - Test and Measurement National Instruments Home Contact NI | United States Modular Instruments PXI Programmable Automation Controllers (PACs) See National Instruments Profile & Catalog |
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