A technician needs to identify unlabeled 4-20mA cables among many landed cables without a second person and without reliable documentation, and standard toners do not work on active circuits.

Workarounds Described

• uses a standard toner that 'doesn't appear to flash on landed cables'
• works alone 'otherwise id shake these cables out'
• relies on flashing lights on Delta V controllers - 'theres about tree fiddy flashing lights'
• P&ID drawings are 'no Bueno'

Implied Software Gaps

• Cable identification app paired with a hardware signal injector that logs and maps cables in real time
• Automated wire tracing tool that differentiates signals on active circuits and guides the user visually

Live Circuit Cable Identifier

A handheld device that injects a detectable, modulated signal onto a live 4-20mA loop without disrupting the process, and a matched probe that identifies the wire at the marshalling panel. It overcomes the limitation of standard toners which require de-energized or disconnected circuits, saving hours of manual tracing.

Existing Solutions Mentioned