Description
Install, calibrate, troubleshoot, and maintain industrial instrumentation and control equipment—pressure, temperature, flow, and level devices; control valves and positioners; analyzers; and related wiring and interfaces—to ensure accurate measurement and safe, reliable process control.
- • Install and commission pressure, temperature, flow, and level transmitters and gauges.
- • Perform loop checks from field instruments to DCS/PLC, verifying 4–20 mA, HART, and Fieldbus signals.
- • Configure smart instruments using communicators and vendor software.
- • Calibrate instruments to specified ranges and tolerances using portable calibrators and standards.
- • Maintain and calibrate control valves, positioners, and actuators; set travel and stroke per specifications.
- • Troubleshoot instrument, wiring, and signal faults with multimeters, pressure sources, and simulators.
- • Record as-found/as-left data, calibration results, and work performed in CMMS or work orders.
- • Verify alarm setpoints, trips, and interlocks; assist with safety instrumented system proof tests.
- • Inspect installations for correct tagging, grounding, and sealing in hazardous areas.
- • Install impulse lines, capillaries, and sample lines; purge and pressure-test assemblies.
- • Terminate and dress instrument cables in junction boxes, marshalling panels, and control cabinets.
- • Replace defective components such as sensors, transmitters, switches, gauges, tubing, and fittings.
- • Clean and lubricate moving parts of valves and actuators per maintenance procedures.
- • Pressure-test and leak-check manifolds, impulse lines, and instrument connections.
- • Read and interpret P&IDs, loop diagrams, datasheets, and wiring schematics.
- • Commission new instruments by assigning tags and entering ranges and scaling in controllers or HMIs.
- • Perform preventive maintenance on instrumentation and control valves per schedule.
- • Isolate and return instruments to service using lockout/tagout and permit-to-work procedures.
- • Assist with PID loop tuning and verify control response and stability.
- • Calibrate temperature elements and transmitters with dry-well calibrators and signal simulators.
- • Calibrate pressure instruments with deadweight testers, test gauges, and pneumatic/hydraulic pumps.
- • Verify level measurements using simulated signals, wet calibrations, or radar configuration tools.
- • Calibrate and maintain gas detection systems and analyzers; replace cells, filters, and probes.
- • Document deviations, hazardous conditions, and abnormal readings; escalate as required.
- • Support turnarounds and shutdowns, including removal, overhaul, and reinstallation of instruments.
- • Repair or replace primary flow elements such as orifice plates, pitot tubes, and meter runs.
- • Install and test telemetry/RTU equipment, signal converters, isolators, and power supplies.
- • Splice and connect instrument and control cables; label and trace loops and terminations.
- • Maintain housekeeping of panels and enclosures; clean, purge, and protect components from contamination.
- • Advise operations on proper use and post-maintenance verification of instruments and control valves.
- • Ensure compliance with codes, standards, and company procedures for installation and calibration.
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O*NET occupational data (work activities, skills, knowledge).
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This site includes information from O*NET by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA), used under the CC BY 4.0 license. Career Clutch has modified some of this information for student readability. USDOL/ETA has not approved, endorsed, or tested these modifications. O*NET® is a trademark of USDOL/ETA.
Last reviewed: Jan 2026
