Browser-based, nothing to install
A responsive web app that runs on the phone or tablet your technicians already carry. It is not a native app-store product.
Mobile Field Check
The cited answer goes to the cabinet with the technician.
Mobile Field Check turns a traced fault into one bounded, read-only field task: which terminal, which input LED, which photo. It runs in a browser on any modern phone, with no app-store install and no special hardware, and it stops the moment conditions aren’t as expected.
INC-PT104-001 · FIELD TASKS · SAMPLE DEMONSTRATION · READ ONLY
Step 03 of 07 · approved
Observe and record the input LED at slot 4 channel 7.
Record the actual LED state, lit or dark, exactly as found. The sample snapshot (observed 2026-08-29 14:12Z) reported this input active; your observation is logged as agreeing, disagreeing, or missing evidence. Stand outside the arc-flash boundary. Read only: do not remove the panel deadfront.
Stop on any unexpected cabinet condition.
Step 04 of 07 · approved
Capture the LS-104 field indication.
Photograph the switch state and label. Do not actuate the device without the approved procedure.
Stop if the process safety state is unclear.
Step 05 of 07 · escalation
Escalate the evidence package.
A human controls engineer compares the field state with the cited rung and the terminal drawing.
Field verification contract
Simple on purpose. Bounded by design.
Mobile Field Check is deliberately not a floating manual or an open chatbot. It exists to confirm or refute one cited claim at a time, safely.
One bounded task at a time
Each assignment is a single read-only check derived from a cited trace, not a manual or a chat thread.
Evidence capture
Photos and observed-state confirmations attach to the exact step, with timestamps, for the incident record.
Visible stop conditions
Electrical boundary, authorization, and safety-state limits stay on screen at every step. When in doubt, the task stops.
Human escalation
When field evidence doesn’t resolve the trace, the task routes to a human controls engineer with the full context attached.
Closes the loop
Completed checks become incident history for the cell, so the next fault starts from what was already proven.
Sample demonstration task package
Verify. Capture. Escalate.
In the PT-104 sample incident, the trace engine identified LS_104_LLO as the blocking instruction for the 2026-08-29 14:12Z sample snapshot but lacks current field evidence. Mobile Field Check does not tell the technician to defeat the interlock; it sends a read-only comparison task with explicit stop conditions, and a human engineer reviews what comes back.
INC-PT104-001 · TASK 03/07Read only
Compare LS-104 field indication with terminal X2-17 and the slot 4 channel 7 input LED.
- Maintain the approved electrical boundary.
- Do not remove the panel deadfront.
- Capture one field photo and one cabinet photo.
- Stop on any unexpected cabinet or process condition.