The below points need to be tested during a instrument loop test.
Instrument
Check the below points for the instruments in the field.
- Air Isolation correct
- Accessible
- Location correct per Loop diagram and P&ID
- Input continuity check
- Calibration
- Range check with Control system
- Loop direct/reverse action
- Serial number correct
- State change OK on control system
MCC/MCR Room
- Fuse/breaker lock box available
- Accessibility of terminations
- Lighting suitable
- Starters and push buttons
- Cabinet air fan acceptable?
- Labels on cabinet door correct
- Wires labeled
- Cables labelled
DCS
- DCS/PLC panels labelled
- Termination panel access suitable
- Termination drawing suitable
- Fuse in place
Documentation
- Interlock data on loop and P&ID correct
- All loop diagram data correct
- Master copy red lines for final mark up
- Control room has copy until as built issued
Download
Instrument Loop Test.pdf (35.4 KB)