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What is a Differential Pressure Transmitter? The Differential pressure transmitter is commonly used in industries as pressure measuring instrument. It is a device that measures two opposing pressures in a pipe or a vessel. This equipment will sense the difference in pressure between two ports and produce an…
What is calibration? In measurement technology calibration is the process of checking the instrument with a standard instrument to improve the measuring functions. The accuracy of standard device taken for calibration should be 10 times the accuracy of measuring device. What is…
What is calibration? Calibration is the process of comparing the reading of one instrument or equipment with a standard instrument. The reference instrument is already calibrated and referenced to a known set of parameters. The reference instrument should itself be directly traceable…
TK-3 Calibrator device offers mechanical reference movement for calibration and performance testing of machine protection devices. The two models of the instrument have identical functions but different power sources. The TK3-2e is powered electrically and pressurized air drives the TK3-2 g. The…
Functions of HART communicator: The main function of the HART 375 Communicator is to communicate with an instrument based on the HART protocol. Provide identification details of the instrument being evaluated. The identification includes the type of instrument, sensor type, model no,…
Definition and Need for Calibration According to Webster’s Dictionary, calibrate means “to check, adjust, or standardize systematically the graduations of a quantitative measuring instrument.” As noted in Inter-Range Instrumentation Group (IRIG) 118-98 Volume I, “a telemetry system measurement begins with the sensing…
Calibration in Fieldbus terminology The terminology differs between the calibration of the conventional instrument and the digital one. Traditionally in metrology, the word calibration means that the instrument under test is compared to a more precise instrument and may include trimming or…
The calibration of the industrial thermometer cannot be done. All we can do is verify that they are reasonably correct. This is true for mercury in glass strip and bimetallic thermometers. The simplest way to calibrate the thermometer is to check the…
A level trol is used to measure and control the level of a tank, where the tanks are in the isolated area. The displacer level transmitter works under Archimedes principle. A force measuring mechanism senses changes in the buoyant force and converts…
For a conventional 4-20 mA instrument, a multi-point test that simulates the input and measures the output is sufficient to characterize the overall accuracy of the transmitter. For a HART transmitter calibration, a multiple point test between input and output does not…