# Cooling and Freezing Equipment Operators and Tenders > Operate or tend equipment such as cooling and freezing units, refrigerators, batch freezers, and freezing tunnels, to cool or freeze products, food, blood plasma, and chemicals. - Code: 51-9193.00 (O*NET-SOC; SOC 2018 51-9193) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 18 tasks (6 core and 12 supplemental) - Page: https://foundation.org.ai/occupations/51-9193.00 - JSON: https://foundation.org.ai/data/tasks/51-9193.00.json ## What the work is made of 1. Record temperatures, amounts of materials processed, or test results on report forms. Core task · Task 8544 · Rated by 72 people who do the job, July 2017 2. Monitor pressure gauges, ammeters, flowmeters, thermometers, or products, and adjust controls to maintain specified conditions, such as feed rate, product consistency, temperature, air pressure, and machine speed. Core task · Task 8543 · Rated by 72 people who do the job, July 2017 3. Read dials and gauges on panel control boards to ascertain temperatures, alkalinities, and densities of mixtures, and turn valves to obtain specified mixtures. Core task · Task 8545 · Rated by 72 people who do the job, July 2017 4. Start machinery, such as pumps, feeders, or conveyors, and turn valves to heat, admit, or transfer products, refrigerants, or mixes. Core task · Task 8547 · Rated by 72 people who do the job, July 2017 5. Correct machinery malfunctions by performing actions such as removing jams, and inform supervisors of malfunctions as necessary. Core task · Task 8546 · Rated by 71 people who do the job, July 2017 6. Assemble equipment, and attach pipes, fittings, or valves, using hand tools. Core task · Task 8548 · Rated by 72 people who do the job, July 2017 7. Measure or weigh specified amounts of ingredients or materials, and load them into tanks, vats, hoppers, or other equipment. Supplemental task · Task 8553 · Rated by 72 people who do the job, July 2017 8. Adjust machine or freezer speed and air intake to obtain desired consistency and amount of product. Supplemental task · Task 8542 · Rated by 72 people who do the job, July 2017 9. Weigh packages and adjust freezer air valves or switches on filler heads to obtain specified amounts of product in each container. Supplemental task · Task 8550 · Rated by 72 people who do the job, July 2017 10. Inspect and flush lines with solutions or steam, and spray equipment with sterilizing solutions. Supplemental task · Task 8557 · Rated by 72 people who do the job, July 2017 11. Load and position wrapping paper, sticks, bags, or cartons into dispensing machines. Supplemental task · Task 8554 · Rated by 72 people who do the job, July 2017 12. Sample and test product characteristics such as specific gravity, acidity, and sugar content, using hydrometers, pH meters, or refractometers. Supplemental task · Task 8559 · Rated by 72 people who do the job, July 2017 13. Start agitators to blend contents, or start beater, scraper, and expeller blades to mix contents with air and prevent sticking. Supplemental task · Task 8552 · Rated by 72 people who do the job, July 2017 14. Insert forming fixtures, and start machines that cut frozen products into measured portions or specified shapes. Supplemental task · Task 8555 · Rated by 72 people who do the job, July 2017 15. Place or position containers into equipment, and remove containers after completion of cooling or freezing processes. Supplemental task · Task 8556 · Rated by 70 people who do the job, July 2017 16. Scrape, dislodge, or break excess frost, ice, or frozen product from equipment to prevent accumulation, using hands and hand tools. Supplemental task · Task 8549 · Rated by 72 people who do the job, July 2017 17. Activate mechanical rakes to regulate flow of ice from storage bins to vats. Supplemental task · Task 8560 · Rated by 71 people who do the job, July 2017 18. Stir material with spoons or paddles to mix ingredients or allow even cooling and prevent coagulation. 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