In industrial and agricultural production, a variety of transmitters are used for measurement and inspection. The measurement method and performance of the transmitter are key factors in the smooth running of the task. The practical application of the site needs to be analyzed for different work objectives and environments, and then a scientific and reasonable measurement plan is made. There are three main types of measurement methods for transmitters: direct measurement method, indirect measurement method and combined measurement method.
Direct Measurement Method:
The direct measurement method uses a transmitter to measure without the need for reprocessing or computation of the measurement results. Get the results you need for your measurements directly. For example, measuring the pressure in the pipes of the water supply system with a pressure transmitter and measuring the temperature of the medium in the tank of the food production workshop with a temperature transmitter are all direct measurements. The advantage of the direct measurement method is that the measurement process is simple and fast, and in actual production, the direct measurement method of the transmitter is widely used.
Indirect Measurement:
In some measurement occasions, the measured cannot or is not convenient for direct measurement, which requires that when using the transmitter to measure, first measure several quantities that have a definite functional relationship with the measured physical quantity, and then substitute the measured value into the function relation, and obtain the required result after calculation, this method is called indirect measurement. Indirect measurement is generally used in situations where direct measurement is not convenient or there is a lack of direct measurement means.
Combined Measurement Method:
When using a transmitter for measurement, if the measured physical quantity must be solved by solving the system of simultaneous equations to obtain the final result, such a measurement is called a combined measurement. When performing combined measurements, it is often necessary to change the test conditions in order to obtain the data required for a set of simultaneous equations. Combined measurement is a special precision measurement method, the operation procedures are more complicated, it takes a long time, and is generally suitable for scientific experiments or special occasions.
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