Surface · PCP
Surface Readout Unit
The panel at surface that reads the permanent downhole gauge through the TEC line and shows pressure and temperature on site.
What it does
Turns the gauge signal into live readings, can log them, and passes them to the field automation system so the well is watched without a site visit.
Basics
| Output | Modbus RTU over RS-485 or RS-232 |
| Gauges | 1, or up to 4 per unit |
| Logging | Optional SD card datalogger |
| Reads | Pressure and temperature from the downhole gauge |
Common failures
- Communication settings that do not match the automation system, so no data reaches it
- Loss of power at site, gaps in the record
Troubleshooting
- Symptom
- Local display reads but the control room sees nothing
- Likely cause
- Modbus address, baud rate or wiring mismatch
- What to check
- Check address, baud rate and RS-485 wiring against the automation setup
- Symptom
- No reading at all
- Likely cause
- TEC or outlet fault, or unit without power
- What to check
- Check power, then run continuity and insulation tests on the TEC from the outlet