For convection type furnaces, preheat the furnace to 538 ± 5 °C (1000 ± 9 °F).

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For convection type furnaces, preheat the furnace to 538 ± 5 °C (1000 ± 9 °F).

Convection type furnaces are preheated to a precise temperature with a small tolerance to ensure consistent furnace conditions and proper processing. The specified target is 538 ± 5 °C, which is about 1000 ± 9 °F. Since the instruction gives the temperature in Celsius, the Celsius value with the same tolerance is the direct match. Converting confirms the equivalence: 538 °C is roughly 1000 °F, and a ±5 °C tolerance is about ±9 °F, so both ranges describe the same acceptable window. The Fahrenheit-only option is the same idea in different units, but the Celsius specification is the required direct match to the stated target.

Convection type furnaces are preheated to a precise temperature with a small tolerance to ensure consistent furnace conditions and proper processing. The specified target is 538 ± 5 °C, which is about 1000 ± 9 °F. Since the instruction gives the temperature in Celsius, the Celsius value with the same tolerance is the direct match. Converting confirms the equivalence: 538 °C is roughly 1000 °F, and a ±5 °C tolerance is about ±9 °F, so both ranges describe the same acceptable window. The Fahrenheit-only option is the same idea in different units, but the Celsius specification is the required direct match to the stated target.

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