what are Characteristic parameters of pressure transmitter?

- Nov 06, 2020-

Measurement range: The range of the measured value within the allowable error limit is called the measurement range.


Upper limit: The highest value of the measurement range is called the upper limit of the measurement range.


Lower limit: The lowest value of the measurement range is called the lower limit of the measurement range.


Range: The algebraic difference between the upper limit and the lower limit of the measurement range is the range.


Accuracy: The degree of agreement between the measured measurement result and the true value.

Repeatability: Under the same measurement conditions, the consistency between the results obtained from multiple consecutive measurements on the same measured.


Linearity error: Linearity error or endpoint linearity is the maximum deviation of a straight line formed by the endpoints of the entire measuring range. That is the deviation between the measured curve and the ideal straight line.


Creep: When the measured and all environmental conditions remain constant, the change in output within a specified time.


Hysteresis: Within the specified range, when the measured value increases or decreases, the maximum difference that appears in the output.


Excitation: The external energy applied to make the sensor work normally. Generally, it is voltage or current. The applied voltage or current is different, the output value of the sensor and other parameters are also different, so some parameters, such as zero output, upper limit output, drift and other parameters should be measured under specified excitation conditions.


Zero drift: Zero drift refers to the change of zero output value under specified time intervals and standard conditions.

The change in the parameters of the semiconductor device caused by the temperature change is the main reason for the zero-point drift phenomenon. Therefore, the zero-point drift is also called temperature drift, or temperature drift for short.

Temperature drift refers to changes in transistor parameters when the ambient temperature changes, which will cause instability of the static operating point, unstable circuit dynamic parameters, and even make the circuit unable to work normally.


Overload: Usually refers to the maximum value that can be added to the sensor or transmitter without causing permanent changes in performance.


Stability: The sensor or transmitter is stored, tested or used under specified conditions, and after a specified period of time, it can still maintain the original characteristic parameters.


Reliability: Refers to the ability of a sensor or transmitter to complete the required functions under specified conditions and within a specified time.


Operating temperature: Refers to the ambient temperature range within which the transmitter can achieve various technical indicators and functions.


Storage temperature: Refers to the temperature range within which the transmitter will not be damaged in long-term storage when it is not powered on.


MRC GOURP suggests that users should take the stability, reliability and low-temperature drift of the transmitter as the core technical indicators for evaluating high-quality pressure transmitters when selecting pressure transmitters. The accuracy of the transmitter is usually highlighted and amplified in the selected materials, but in actual use, users are more eager for the product to work stably and reliably for a long time, and only such a product can minimize the maintenance workload of the field instrument.

We recommend that you choose a pressure transmitter with both high precision and high stability. If you are interested, you can call us +86 18991346449

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