Home Canning TipsDigital Radiant CooktopObserve thefollowingpoints incanningNote: Flat-bottomedcanners are requiredfor glass cooktops.Right!Wrong!Pots that extend beyond 1 inch of the surfaceunit’s circle are not recommended for mostsurface cooking. However, when canning withwater-bath or pressure canner, larger-diameterpots may be used. This is because boiling watertemperatures (even under pressure) are notharmful to the cooktop surfaces surroundingthe surface units.HOWEVER, DO NOT USE LARGEDIAMETER CANNERS OR OTHER LARGEDIAMETER POTS FOR FRYING ORBOILING FOODS OTHER THAN WATER.Most syrup or sauce mixtures—and all types offrying—cook at temperatures much higher thanboiling water. Such temperatures couldeventually harm the glass cooktop surface.1. Be sure the canner fits over the center of thesurface unit. If your cooktop or its locationdoes not allow the canner to be centered onthe surface unit, use smaller diameter potsfor good canning results.2. Flat-bottomed canners must be used. Do notuse canners with flanged or rippled bottoms(often found in enamelware) because theydon’t make enough contact with the surfaceunits and take a long time to boil water.3. When canning, use recipes and proceduresfrom reputable sources. Reliable recipesand procedures are available from themanufacturer of your canner; manufacturersof glass jars for canning, such as Ball andKerr; and the United States Department ofAgriculture Extension Service.4. Remember that canning is a processthat generates large amounts of steam.To avoid burns from steam or heat, becareful when canning.NOTE: If your house has low voltage, canningmay take longer than expected, even thoughdirections have been carefully followed. Theprocess time will be shortened by:(1) using a pressure canner, and(2) starting with HOT tap water for fastestheating of large quantities of water.CAUTION:• Safe canning requires that harmfulmicroorganisms are destroyed and that thejars are sealed completely. When canningfoods in a water-bath canner, a gentle butsteady boil must be maintained for therequired time. When canning foods in apressure canner, the pressure must bemaintained for the required time.• After you have adjusted the controls, it isvery important to make sure the prescribedboil or pressure levels are maintained for therequired time.• Since you must make sure to process thecanning jars for the prescribed time, with nointerruption in processing time, do not canon any cooktop surface unit if your canner isnot flat.If the bottom of your canner is not flat, thesurface unit can overheat, triggering thetemperature limiter to cycle the unit offfor a time. This will stop the boil or reducethe pressure in the canner.What is atemperaturelimiter?The cooktop surface units have temperaturelimiters that prevent the glass cooktop fromgetting too hot.The Temperature Limiter may cycle the unitsoff for a time if:• The pan boils dry.• The pan bottom is not flat.• The pan is off center.• There is no pan on the unit. 15