Electrical
What this tool does
Compare barrier entity parameters with the field device and cable. 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 IS entity parameter check when this is the job: Compare barrier entity parameters with the field device and cable. That is usually a loop, a conductor, a raceway, or a barrier you are about to accept or reject.
Step-by-step
- Open IS entity parameter check from the tool list.
- Fill Vmax, Vt, Imax, It 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
- Vmax
- The highest voltage the field device certificate allows.
- Vt
- The highest voltage the barrier is rated to pass.
- Imax
- The highest current the field device certificate allows.
- It
- The highest current the barrier is rated to pass.
- Pmax
- The highest power the field device certificate allows.
- Pt
- The highest power the barrier is rated to pass.
- Ca
- Capacitance the barrier is allowed to see.
- Ci
- Capacitance of the field device.
- Ccable
- Capacitance of the cable.
- La
- Inductance the barrier is allowed to see.
- Li
- Inductance of the field device.
- Lcable
- Inductance of the cable.
Results
- Result
- The reported value for IS entity parameter check. 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 metal, the wrong insulation column, or a one-way length where the circuit is a round trip.
- Comparing barrier and device parameters that are not from the same certificate columns.
- Applying a fill or ampacity table to a raceway or a wire the table does not cover.
- Do not treat a result from IS entity parameter check 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.
- NEC hazardous-location articles
- ISA entity-parameter method (public IS practice)
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.