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Questions tagged [instrumentation]

49 questions
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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 boiler when the boiler is re pressurized after use the…
Manu de Hanoi
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4
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Is there an industry consensus standard for storing sensor data?

I would like to know what standard(s) may exist for formatting log data from sensors that record information such as: temperature pressure humidity vibration acceleration vector magnetic field vector location vector (ex: GPS) etc. I have been an…
baltakatei
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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 ideal.
imhotraore
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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 triggered when near to 85 degrees pitch. "Near that point,…
Keith
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How to identify a P&ID diagram symbol used by more than one control loop

I know that a P&ID symbol has a loop number. For instance in the image below the number is 0134. In case an instrumentation is used by more than one control loop (so I need to write more than one number), how can I identify the instrumentation?…
GibbOne
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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 for P&ID diagram symbols?
Cameron Wight
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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 a solar balloon address these challenges?
Ananyo Bhattacharya
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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 18/20/23 represent. The unit actively controls a…
Brad Morris
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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 in use. PMTs ageing speed increases with the He…
muzzle
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Help with designing support structures for instrument

I am an instrumentation engineer and I need your help with designing a support structure for a gas-measuring (precision) instrument. The instrument works in an emitter-detector configuration, and measures gas concentration inside a duct. Alignment…
vasiqshair
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How to add a Gaussian noise signal with zero-mean in a given data set?

I have a real-time velocity measurement data set in a excel (.xlsx) file. I want to add the Gaussian noise signal with zero mean in this real-time data to create three set of pseudo measurements. Could you please tell me how to do this in the excel…
S.Prabhu
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Does P&ID have cross-reference same as electrical drawing?

In electrical i usually use cross-references to identify their symbols locations, I am still yet a lot to discover P&ID. So my question is, does P&ID have this such of thing?
Sahil Syazwan
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What does this P&ID symbol represent?

The symbol: Here is a part of the diagram:
storgt2
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How is the YAW angle calculated by an IMU sensor?

Say a body rotates by 90 degrees, then the yaw angle will be 90 which can be calculated using the data provided by IMU. Now from that point, the body traverses some distance and is again rotated by 90 degree in the same direction. What will be yaw…
Alphanerd
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Identification a Symbol for P&ID's Standards

i have a question regarding on PID standards ISO 14617. Below is the attached symbol graphic, i seem cannot find anywhere what actually this symbol refer to from standards that i have looked up; PIP, ISO, DIN and BS. I would appreciate if anyone…
Sahil Syazwan
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