The Mid-Level Loop Checking Technician is responsible for performing, validating, and troubleshooting loop checks for analog and digital field instruments. This role ensures that all signals between field devices and control systems (PLC/DCS) are correctly installed, wired, and functional, supporting safe and efficient commissioning and startup of industrial facilities.
Loop Check Execution:
Perform loop checks on analog (4–20mA, 0–10V) and digital (ON/OFF) signals, verifying sensor integrity, wiring correctness, and communication with control systems.
Field Troubleshooting:
Identify and correct wiring faults, signal discrepancies, grounding issues, and device malfunctions during loop checks.
Calibration Verification:
Collaborate with instrumentation engineers and calibration teams to confirm that transmitters and actuators are responding accurately within acceptable tolerances.
Loop Documentation:
Accurately complete loop check sheets, redline loop diagrams, and update punch list items in coordination with QA/QC and commissioning teams.
System Coordination:
Coordinate with DCS/PLC operators to simulate and verify signal responses from field to control room and vice versa.
Standards Compliance:
Ensure loop checks are conducted in accordance with project specifications, engineering drawings, and industry standards (ISA, IEC).
Safety Practices:
Follow LOTO procedures, electrical safety guidelines, and jobsite protocols to ensure safe work practices during loop testing and energization.
Signal Integrity and Diagnostics:
Independently troubleshoot and verify signal paths, addressing common issues in analog/digital loops such as short circuits, open loops, and miswired terminals.
Loop Documentation and Turnover:
Provide accurate and detailed documentation for loop completion as part of mechanical completion and pre-commissioning milestones.
Instrumentation Familiarity:
Proficient in working with transmitters, switches, solenoid valves, control valves, limit switches, and vibration sensors.
Collaboration with Controls Team:
Work closely with PLC/DCS engineers to simulate inputs and validate outputs for seamless integration.
Pre-Commissioning Support:
Contribute to the systematic pre-commissioning process by ensuring functional integrity of all I/O loops prior to energization.
Diploma or Trade Certificate (ITI) in Instrumentation, Electrical, or related technical discipline.
2–5 years of field experience in instrumentation installation, loop checking, or commissioning projects.
Proficiency in using loop calibrators, multimeters, signal simulators, and handheld communicators (e.g., HART devices).
Ability to read and interpret P&IDs, loop diagrams, wiring schematics, and I/O lists.
Working knowledge of industrial control systems (PLC/DCS) and signal standards.
Strong problem-solving skills, attention to detail, and a proactive safety mindset.