Temp
What this tool does
Strouhal wake frequency against a cantilever natural frequency, using the ASME PTC 19.3 TW 0.8 and 0.4 screens. This page says what the tool is for, in plain language. The working formula stays on the signed-in tool.
When to use it
Open Thermowell wake frequency when this is the job: Strouhal wake frequency against a cantilever natural frequency, using the ASME PTC 19.3 TW 0.8 and 0.4 screens. That is usually a sensor check, a cold-junction question, or a reading that does not match the gauge.
Step-by-step
- Open Thermowell wake frequency from the tool list.
- Fill Units, Velocity, Strouhal number, Outside diameter from the instrument, the drawing, or the job record. Use the unit shown beside each field.
- Fill the remaining fields the same way. Skip a field only when the screen marks it optional.
- Run Calculate when that control is on the page, then read every result row and any warning.
- Check the result against the site procedure and the manufacturer data before you change a range, a wire, a setpoint, or a weight.
- This help page is public. Opening the tool still requires a Pro session.
Inputs
- Units
- Imperial or metric. Pick one and enter every other field in that system.
- Velocity
- Velocity is the value you read from the instrument, the drawing, or the job record. Enter it in ft/s.
- Strouhal number
- Strouhal number is the value you read from the instrument, the drawing, or the job record.
- Outside diameter
- Outside diameter is the value you read from the instrument, the drawing, or the job record. Enter it in in.
- Inside diameter
- Inside diameter is the value you read from the instrument, the drawing, or the job record. Enter it in in.
- Insertion length
- Insertion length is the value you read from the instrument, the drawing, or the job record. Enter it in in.
- Young's modulus
- Young's modulus is the value you read from the instrument, the drawing, or the job record. Enter it in psi.
- Density
- Density is the value you read from the instrument, the drawing, or the job record. Enter it in lb/ft³.
Results
- Result
- The reported value for Thermowell wake frequency. Use the unit printed on that row.
- Warnings
- A warning means an entry is incomplete or outside what this tool will stand behind. Recheck the inputs and the site procedure.
Common mistakes
- Picking the wrong sensor type, or leaving the cold junction at a temperature the terminal is not at.
- Reading resistance or millivolts as if they were already a temperature.
- Using a tolerance class that is not the class stamped on the sensor.
- Do not treat a result from Thermowell wake frequency as a substitute for the site procedure or the manufacturer data.
Standards references
These are the standards and public references named on this tool. Clause numbers appear only when the catalog already cites them.
- ASME PTC 19.3 TW wake-frequency criteria (transverse 0.8 fn, in-line screen at 0.4 fn)
- Strouhal relation for a circular cylinder
- Euler–Bernoulli cantilever, first mode
Offline and access
This engine can run offline after the server has cached it for the signed-in account.
A free session can read this help page. The tool card shows the name and the short summary. Opening the tool requires Pro.