The Mid-Level Loop Testing Technician is responsible for independently conducting loop checks, verifying continuity, and performing functional testing of instrumentation and control loops during pre-commissioning and post-commissioning phases. The role ensures that field instruments are properly installed, configured, and communicating with control systems in line with project specifications and safety standards.
Loop Testing Execution – Perform analog/digital loop checks from field to DCS/PLC including signal simulation and I/O response verification.
Field Device Configuration – Calibrate and configure transmitters, switches, and control valves using HART/Fieldbus tools.
Troubleshooting – Identify and rectify loop faults, wiring mismatches, polarity issues, or improper instrument readings.
Test Documentation – Complete and verify loop test forms, update redline drawings, and maintain accurate commissioning records.
Coordination with Control Room – Interface with DCS/PLC operators during functional testing, interlock verification, and logic testing.
Execute loop checks for all instrument types including pressure, temperature, flow, and level transmitters, as well as valve positioners and solenoids.
Verify signal paths from instruments to junction boxes, marshalling panels, and control systems.
Conduct calibration and validation of analog/digital signals using loop calibrators and multifunction testers.
Read and interpret loop diagrams, I/O lists, P&IDs, and wiring schematics.
Log and report punch items, assist in resolving field non-conformities, and ensure loop folders are completed.
Ensure loop integrity and safety interlocks are functional prior to plant startup.
Technical Diploma in Instrumentation, Electronics, or Electrical Engineering.
3–6 years of experience in instrument commissioning or loop testing on industrial projects.
Hands-on experience with control systems such as DCS, PLC, ESD, and SCADA.
Familiarity with commissioning standards and safety protocols (IEC/ISA, project-specific standards).
Proficient with test equipment: loop calibrators, multimeters, signal simulators, and HART communicators.
Strong troubleshooting and analytical skills.
Ability to interpret technical documents and loop packages.
Good coordination with multi-discipline teams (electrical, control systems, operations).
High attention to safety, quality, and documentation accuracy.