Calibration Plane
Calibration Plane - Related Videos
07:43
Calibration Curves
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Calibration curves are used to understand the instrumental response to an analyte and predict the concentration in an unknown sample. Generally, a set of standard samples are made at various concentrations with a range than includes the unknown of interest and the instrumental response at each concentration is recorded. For more accuracy and to understand the error, the response at each concentration can be repeated so an error...
01:11
Glassware Calibration
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2024
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes. Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
08:12
Pressure Transducer: Calibration Using a Pitot-static Tube
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2023
Source: Shreyas Narsipur, Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC Fluid pressure is an important flow characteristic that is required to determine the aerodynamics of a system. One of the oldest and still existing pressure measurement systems is the manometer due to its accuracy and simplicity of operation. The manometer is generally a U-shaped glass tube that is partially filled with liquid, as shown in Figure 1. The U-tube manometer requires no...
01:12
Instrument Calibration
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2024
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy. Analytical Balance Calibration An analytical balance measures mass and requires regular calibration to...
08:46
Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity
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Cited by 48 •
2014
Antifreeze proteins (AFPs) bind to specific planes of ice to prevent or slow ice growth. Fluorescence-based ice plane affinity (FIPA) analysis is a modification of the original ice-etching method for determination of AFP-bound ice planes. AFPs are fluorescently labeled, incorporated into macroscopic single ice crystals, and visualized under UV light.
FAQs
The calibration plane matters because it determines which portion of the measurement setup is treated as part of the instrument rather than part of the device under test. Known standards allow engineers to characterize systematic contributions from cables, fixtures, and connectors. Removing those contributions makes the measured device behavior more representative of its actual response.
Open, short, load, and through connections provide known measurement conditions against which the instrument can be evaluated. Their measured results reveal systematic effects associated with the test path, including attached cables, fixtures, and connectors. Engineers use that information to correct subsequent measurements, rather than interpreting those setup-related effects as characteristics of the device.
De-embedding and electrical-length correction allow engineers to move the effective reference location after the original calibration has been performed. This is useful when the desired measurement location differs from the initial setup location. By shifting the plane mathematically, measurements can be interpreted at the device under test instead of at a more convenient upstream connection.
A basic workflow measures selected known standards at the intended test connection, uses those results to characterize systematic measurement errors, and applies the resulting correction to later measurements. The engineer then treats the device under test as beginning at that reference location, or shifts the plane mathematically when the physical connection and desired measurement point do not coincide.
Calibration plane control is especially important for vector network analysis, impedance measurements, and high-frequency characterization. At higher frequencies, cables, fixtures, and connectors can produce effects large enough to influence the apparent device performance. Establishing or shifting the reference location helps engineers distinguish the behavior of the device from contributions introduced by the measurement interconnects.
Placing the reference plane at the device under test makes the reported measurement correspond more directly to the device connection rather than to the complete path leading to it. This improves interpretation when interconnect effects are significant. If direct placement is impractical, mathematical shifting provides an alternative for relating the measured result to the device location.