Questions tagged [instrumentation]

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Why is there no widely-used standardized unit for indentation hardness?

The last hundred years have seen a great degree of standardization of units, and the expression of units of measurement in standardized, instrument-agnostic, objective terms, often in the SI units. ...
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6 views

Time delay in wave generation, High Density Arbitrary Waveform Generators, (Zurich Instruments)

I am trying to generate 2 waves without any phase delay using HDAWG, Arbitrary Waveform Generator(2.4 GSa/s, 16 bit), by Zurich Instruments. I have written the code in the Lab One user interface, ...
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1answer
61 views

P&ID Symbol Identification Question

Does anyone know what these three symbols are? I am working to identify them but they do not seem to appear in the site: https://www.edrawsoft.com/pid-legend.php Does anyone know a better reference ...
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31 views

Output matrix for system with accelerometer

Consider a generic second order state space SISO system \begin{equation} \left[ \begin{array}{c}{\dot{\tilde{x}}_{1}} \\ {\dot{x}_{2}}\end{array}\right]=A \left[ \begin{array}{c}{\tilde{x}_{1}} \\ {\...
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1answer
37 views

Why do gimballed gyroscopes platforms need drive motors in order to maintain it's fixed orientation?

I have a fundamental misunderstanding about the role of gimbals and gyroscopes in determination of angular rotation rates (in inertial measurement units). A set of three gimbals enables an object ...
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1answer
44 views

How to create a Liquid tight cable seal in a fuel storage tank

I am working on a telemetry system where a liquid level sensor (Hydrostatic pressure sensor) is used to monitor the volume of fuel (gasoline / diesel) in an underground storage tank. The sensor has ...
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2answers
63 views

What is the name and purpose of this Instrumentation / Mechanical fitting

The component I am interested in is the blue "head" in the attached image. I call it the sensor head but will like to know if it has a specific industry name
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2answers
38 views

How to measure number of strokes in a small space

I have read about a device called drumometer, which measures the number of strokes of hitting drum stick. I think this is almost the same, but instead, I would like to measure the number of strokes/...
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1answer
33 views

If I replace a flow orifice with a Coriolis flow meter of the same size do I need to worry about pressure drop with the new Coriolis meter?

I have a 3 inch line with a 1.5 inch flow orifice. If I take out the flow orifice and put in a 1.5 inch coriolis meter will the pressure drop be the same or better with the new coriolis meter than ...
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1answer
19 views

Operating a load cell below excitation voltage

I currently have this load cell, which has a 10V excitation voltage. However, there is a very nice/convenient load cell amplifier that works with an excitation voltage of 5 VDC. What are the ...
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2answers
357 views

How do solar balloons work at high altitudes?

I am interested in the challenges that Solar Balloons face when flying. For example, the high altitude could cause drastic changes in: Wind speed Temperature Moisture How does the unique design of ...
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3answers
104 views

Selection of corrosion resistant material for mechanical testing apparatus

I want to build a 4-point bending apparatus for operating within a corrosive environment, using EXCO type corrosion solution as seen in ASTM Standard G46. Thus, in this highly corrosive environment, I ...
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1answer
41 views

Real world applications where one would use a force function in PLC programming?

I'm curious about which scenarios one would use a force function when using a PLC programming interface. Examples pertaining to process engineering, manufacturing, or industrial settings would be ...
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2answers
1k views

What is the difference between TE and TI?

I have done some research about the subject but I can't find the difference between Temperature Element (TE) and Temperature Indicator (TI) Here is an image of the P&ID of the project am ...
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0answers
59 views

Need help identifying component on hydraulic schematic

I'm relatively new to hydraulics, and I'm trying to understand this schematic. I've got the majority of the system figured out, but I cant for the life of me understand what the symbols at positions ...
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1answer
89 views

Automated valve for testing module

I work frequently with materials sensitive to oxygen and moisture, within a glove box. However, there are frequently times I want to move these samples from the glove box to a scanning electron ...
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1answer
27 views

How can I determine pressure leakage in a pneumatic system?

I am an engineer currently designing a system in which the leakage of a hose is tested. The system consists of the following components: An air data system used to generate a pressure inside the hose....
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1answer
50 views

Maximum Tensile strength confusion [closed]

Is the maximum tensile strength a property of a material ? If it is so then suppose I am given the maximum tensile strength of two flat spiral springs to be $30MN/m^2$ and I have to find the ...
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0answers
60 views

Not getting accurate readings from my multimeter

EDITED THIS POST FOR THE PEOPLE WHO PROVIDED ME WITH GREAT FEEDBACK I have been building a few simple project circuits, mainly to analyze electronic theory. The problem I'm having right now is that ...
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4answers
443 views

How to measure the pressure inside a bottle rocket?

I'm making a pressurized bottle rocket out of a plastic bottle, vinegar, baking soda and a cork. When the vinegar & baking soda react in the closed bottle, the pressure builds up but i want to ...
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2answers
144 views

Calibration curve of an instrument

In the calibration procedure of an instrument (e.g. a pressure transducer), when we want to determine the calibration curve, is it a good choice to force the passage of the calibration curve through ...
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2answers
611 views

How do gimbals affect gyros?

"By mounting a gyro on a set of gimbal rings, the gyro is able to rotate freely in any direction. Even though the gimbal rings are tiled, twisted, or otherwise moved, the gyro remains in the plane in ...
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2answers
2k views

How to get natural frequencies from accelerometer measurements?

I will be performing some tests and measuring the vibrations of a planetary gearbox. The accelerometer I will be using stays attached to the gearbox and saves the data into a log, which is available ...
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0answers
50 views

Ambient helium level monitoring

I am looking for a solution to monitor and log ambient He levels down to 50-100ppm. The detector is meant to be installed in an experimental hall where a large number of Photo Multiplier Tubes are ...
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1answer
47 views

How would you measure the electrostatic field of a celestial body from its surface?

If we need to measure the Electrostatic field of a celestial body due to its interaction with space plasmas, What kind of instruments can be used to achieve this?
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2answers
68 views

Data accuracy measurment

What is the meaning of sentence "Measured Data has 30 PPM accuracy"? I want to know what is the meaning of PPM accuracy.
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3answers
745 views

Apollo 11 gimbal lock flip

I've been studying gimbal lock and am puzzled by something in regards to the Apollo 11 mission mentioned on Wikipedia. They preferred an alternate solution using an indicator that would be ...
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1answer
394 views

How to protect a pressure gauge from condensation in a vacuum steam boiler?

Pressure gauges are protected from steam condensation in a regular boiler by using a siphon where steam condenses and prevents steam from going further up to the gauge. However in a vacuum steam ...