DP Level & Flow
What this tool does
Fill-fluid density shift and the resulting zero error on a differential-pressure seal. 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 Capillary seal drift when this is the job: Fill-fluid density shift and the resulting zero error on a differential-pressure seal. That is usually a level or flow calibration, a bore check, or a valve you are about to size.
Step-by-step
- Open Capillary seal drift from the tool list.
- Fill Units, High-side height, Low-side height, Fill specific gravity 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.
- High-side height
- High-side height is the value you read from the instrument, the drawing, or the job record. Enter it in in.
- Low-side height
- Low-side height is the value you read from the instrument, the drawing, or the job record. Enter it in in.
- Fill specific gravity
- Fill specific gravity is the value you read from the instrument, the drawing, or the job record.
- Volumetric expansion
- Volumetric expansion is the value you read from the instrument, the drawing, or the job record. Enter it in 1/°C.
- Calibration temperature
- Calibration temperature is the value you read from the instrument, the drawing, or the job record. Enter it in °F.
- High-side temperature
- High-side temperature is the value you read from the instrument, the drawing, or the job record. Enter it in °F.
- Low-side temperature
- Low-side temperature is the value you read from the instrument, the drawing, or the job record. Enter it in °F.
- High-side temperature span
- High-side temperature span is the value you read from the instrument, the drawing, or the job record. Enter it in °F.
Results
- Result
- The reported value for Capillary seal drift. 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
- Using the wrong specific gravity, or forgetting a wet leg, a seal fill, or a blanket pressure.
- Mixing a head unit with a pressure unit without reading the unit on the screen.
- Sizing from a flow or a differential that is not the one in the line.
- Do not treat a result from Capillary seal drift 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.
- Hydrostatics, P = ρgh
- Constant-mass volumetric expansion of the fill fluid
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.