A professional who controls converter to change starch into glucose or corn syrup, and tests products to verify purity (specified dextrose content). Respnsibilities include:

• Turns valves to admit steam and water into converter.
• Introduces starch into converter so that cooking occurs as starch is added.
• Detects from sound of cooking process formation of paste, and adds acid, as necessary, to reduce viscosity.
• Closes converter and turns valve to attain specified pressure.
• Draws off samples, and makes standard iodine and alcohol titration tests.
• Turns valves to blow syrup into tank when tests indicate conversion is complete.