Testing & Maintenance Services

Technical Diagnostic Services (TDS) provides a broad range of technical services to support the start-up, commissioning and maintenance of generating plants, substations, and industrial facilities.

TDS performs maintenance and testing activities at numerous types of facilities, including:

  • Nuclear plants
  • Fossil plants
  • Substations
  • Co-Generation plants
  • Hydro plants
  • Geothermal plants
  • Large commercial plants
  • Industrial plants
  • Petrochemical plants


Our certified personnel can assume full responsibility for a specific project as a subcontractor or supplement your staff without adding personnel to your permanent payroll. Whether a short or long-term project, one person or 100, TDS provides certified personnel and calibrated equipment to perform the following services.

Complete Electrical System Testing and Maintenance

  • Testing and maintenance of protective relays
  • Circuit-breakers
  • Other protective devices
  • Acceptance testing and calibration
  • Substation checkout and maintenance
  • Switchgear testing and maintenance
  • Grounding
  • Infrared Inspections

Instrumentation and Controls Testing, Maintenance, and Retrofit

  • Calibration and testing of instruments
  • Loop shooting and configuration
  • Loop tuning, scaling
  • DCS configuration & testing
  • DCS upgrades and modifications

Mechanical Systems Testing, Maintenance and Retrofit

  • Pump installation, alignment, startup, configuration, and rebuild
  • Turbine startup, alignment, and inspection
  • Boiler startup, overhaul, and checkout
  • Boiler tuning
  • Rotating equipment and balance of plant
  • Vibration monitoring and analysis
  • CEMS testing and commissioning

Specialized Plant Testing and Commissioning

  • Performance Testing
  • Load Bank Testing
  • Coordination Studies

Whether you are looking for personnel to help staff your two week outage, or for qualified engineers for a year long commissioning project, TDS can provide the right people to make your project successful.

Contact us today!
(817) 465-9494
(800) 225-7271