A pressure transmitter is a device that converts pressure information into current, voltage or digital signals for control and remote transmission. The pressure transmitter can measure physical pressure parameters such as gas and liquid, and supply secondary instruments such as indicating alarms, recorders, and regulators for measurement, indication and process adjustment. When selecting a pressure transmitter, the determination of the measuring range is very important, which directly affects the accuracy of the pressure transmitter measurement and the service life of the pressure transmitter.
Simply put, the maximum pressure range of the pressure transmitter should be 1.5 times the maximum pressure value of the system. When selecting the range, the normal, maximum, and minimum values of the measured object should be predicted in advance. In general, the range selection should meet:
1. The lower limit of the measurement range should be lower than or equal to the minimum value;
2. The upper limit should be higher than the maximum value;
3. The normal value is within the range of 1/2~4/5 of the entire range.
In many working condition systems, there will be surges, pulse bursts and other interfering signals that affect the measurement of pressure transmitters, especially in water pressure measurement and processing, there will be peaks and continuous irregular fluctuations, and this instantaneous peak can destroy the pressure transmitter. Consistently high pressure values or slightly exceeding the upper range of the pressure transmitter shortens the service life of the pressure transmitter.
Here to explain to you, the pressure transmitter has a measurement range, such as 0-100MPa, at this time the starting point of the pressure transmitter is 0MPa, called the lower limit of the range is also called the zero point; The end point of 100MPa, called the upper limit of measurement, is also called full-scale. Range = Upper Measurement Limit – Lower Measurement Limit.
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