Something is Wrong with Strain Gauge Bridge Circuit
A strain gauge is an array constructed from thin metal film designed to increase resistance as it is stretched and decrease resistance as it is compressed. Strain gauges are typically…
How a Bourdon Tube Pressure Gauge might be Adjusted for Linearity?
A pressure gauge is supposed to accurately indicate applied pressure over its full calibrated range. Bourdon Tube Pressure Gauge In this example, a gauge with a range of 0 to…
What is the Purpose of Bourdon Tube Gauge Spiral Spring?
Some bourdon tube gauges are equipped with a very small spiral spring attached to the pointer shaft: Bourdon Tube Gauge Now, this spring is much too weak to have any…
How to Decrease Span of Pressure Gauge?
Suppose a pressure gauge uses a diaphragm as its pressure-sensing element, like this: Â Pressure Gauge This mechanism will work, but what if we desired to make it more sensitive? That…
Simulate Different Values for Pressure Instrument Under Test
One challenge technicians face when calibrating low-pressure instruments is how to generate very low air pressures to simulate different low-pressure conditions for the pressure instrument under test. Measuring low pressures…
Why Pressure Vessel Connected to Tubing System?
A very useful principle in physics is the Ideal Gas Law, so called because it relates pressure, volume, molecular quantity, and temperature of an ideal gas together in one neat…
What Affect the Pressure Measurement Accuracy of a Manometer?
A device called a manometer is a very simple and yet very precise pressure measuring instrument. It works on the principle of a differential pressure displacing a vertical liquid column.…
How Measurement Span of Pressure Gauge Could be Changed?
Shown here is a diagram of a standard pressure gauge, based on the pressure-sensing action of a hollow, C-shaped metal tube called a bourdon tube: Using arrows, trace the motions…
How Manometer Measures Differential Pressure for Different Fluids?
A manometer may be used to measure differential pressure across a restriction placed within a pipe. Pressure will be dropped as a result of flow through the pipe, making the…
How Much Pressure Indicated by Micromanometer?
A simple way to make a micromanometer (an extremely sensitive manometer) is to connect two large-diameter vertical tubes by a small-diameter, transparent tube with an air bubble in it. The…
