When measuring the temperature split for an electronic furnace, what should the temperature probe avoid being affected by?

When measuring the temperature split for an electronic furnace, it's crucial to avoid the effects of radiant heat on the temperature probe. Radiant heat can interfere with the accurate reading of air temperature at the probe's location, leading to an erroneous assessment of the system's performance. This is particularly important because radiant heat can create hot spots that do not accurately reflect the overall air temperature circulating from the furnace.

In contrast, while drafts from windows, airflow from vents, and humidity can influence the environment, they do not have the same direct impact on the temperature readings of the probe as radiant heat does. Drafts could cause fluctuations that might affect overall air distribution but are less likely to interfere with the specific measurements taken by the probe compared to radiant heat sources. Therefore, ensuring that the probe is shielded from external radiant heat sources is key to obtaining reliable and valid temperature readings when evaluating the furnace's performance.