Metropolitan Water Reclamation District of Greater Chicago

Electrical Instrument & Testing Mechanic (#20007423)

General Statement

Under general supervision, performs skilled work in the repair, testing and maintenance of various equipment at District facilities including, plant process control equipment, power distribution systems, voice and data communication networks, including telemetry.

Essential Job Functions

Essential job functions are fundamental, core functions common to positions in a classification. They are not intended to be an exhaustive list of all job duties for any one position in the class. Since class specifications are designed to be descriptive and not restrictive, incumbents may complete one or all of the job duties listed or tasks of similar kind not specifically listed here.

  • Performs skilled work in the repair, calibration, commissioning, configuration, testing, and maintenance of process instrumentation.
  • Utilizes a variety of test equipment to analyze and troubleshoot power distribution, process control and communication systems and other equipment as required.
  • Repairs and calibrates various instruments or analyzers used in measuring water level, precipitation, temperature, rate of flow, ph, dissolved oxygen, density, steam quality, power, air quality, vibration, proximity, cable location, and water quality.
  • Repairs and maintains equipment used in transmitting and receiving signals used for plant process control.
  • Maintains and repairs measurement sensing units.
  • Troubleshoots, repairs and maintains protective relays and portable radios.
  • Checks breakdown voltage characteristics on insulators, cables, and other circuit components.
  • Uses hand tools and equipment required for detail work that are common to this trade.

Other Job Functions

  • Is responsible for the custody and care of all tools and equipment used in performing electrical instrument repair and testing.
  • Performs other duties as assigned.

Environmental Conditions

Typical duties involve exposure to industrial equipment or operations including working near operating mechanical equipment and loud noise. Duties may also involve working in close proximity to or in conjunction with construction activities. Work may be performed in a variety of weather conditions and may involve working in confined spaces or at heights. Duties could include contact with hazardous or toxic materials and exposure to noxious odors. Some positions require the operation of a District vehicle.

Desirable Knowledge, Skills and Abilities

  • Considerable knowledge of the operating and repair procedures of a wide variety of electric, electronic, or mechanical process instrumentation, including fiber optics and radio communication devices.
  • Considerable knowledge in testing and calibration of equipment and relays for power distribution systems.
  • Considerable knowledge of the occupational hazards and safety precautions associated with the work, relating especially to low, medium and high voltage equipment.
  • Skill in the operation of computers necessary to perform equipment configuration, maintain essential databases, and data entry to document work done and materials used.
  • Skill in the repair and calibration of process instrumentation and automated systems including programmable logic controllers (PLCs).
  • Skill in the use and care of the equipment and tools of the trade.
  • Ability to read basic electrical prints and schematics (such as contract drawings or basic equipment diagrams).
  • Ability to understand and follow oral and written instructions.

Minimum Qualification Requirements

Graduation from a standard senior high school or the equivalent and four years of experience in the repair and calibration of electronic process instrumentation.


Additional experience may substitute for the required education on a year-for-year basis. College-level or other approved post-secondary training in instrumentation technology, electrical/electronics technology or electronic engineering technology may be substituted for the required experience on a year-for-year basis.

Promotional Requirement

  • None

CLASS: 20007423; EST: 1/1/1900; REV: 1/1/2016;