Why pressure gauges and other pressure devices need to be calibrated?
Almost all sensors, gauges and meters are subject to drift. Drift means that the instrument slowly becomes less accurate. It means that there might be quality problems with the products or there might also incur serious safety issues.
Deviation within the manufacturer’s specifications, where the calibration certificate confirmation is required deviation out of specifications, where adjustments are needed to ensure that we can easily use the sensor again depending on the standards we want to use, we can differentiate between 3 similar cases: Verification, Adjustment, Calibration
Pressure Measurement Devices
There is a multitude of pressure devices available for measuring different types of pressure or specialized for different applications. Some of them measure other variables as well.
differential pressure transmitters
Following this, we can arrive at two scenarios:
What is pressure measurement?
In short, pressure is a force exerted in an area. But how do we measure it will depend on what kind of pressure we want to measure. There are three kinds of pressure measurement and different devices to measure each: absolute, gauge and differential pressure
Pressure gauge calibration
Calibration is the procedure of comparing a reference with a known error margin against a device (for example a pressure gauge) under test. If the device doesn’t match the reference, then we adjust it to match, or at least come close, the desired measuring accuracy.
The reference measurement instrument must be more accurate than the pressure gauge to be calibrated, and it must also be traceable. To calibrate a pressure gauge, we will need to check the values throughout the entire measuring range, zero-point, intermediate values, and the full-scale value.
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