Which reading is not listed among the expected open-circuit thermocouple values?

Which reading is not listed among the expected open-circuit thermocouple values?

• A. 10-20 MV
• B. 2-4 MV
• C. 20-30 MV
• D. 15-25 MV

Answer: (D)

Open-circuit thermocouple readings are small voltages in the millivolt range, and quick references group them into standard bands so you can estimate temperature without a full lookup. Common reference bands are around 2–4 mV for the lower end, 10–20 mV for the middle range, and 20–30 mV for the higher end. These buckets cover typical open-circuit outputs at different temperatures. The reading that doesn’t align with those standard bands is 15–25 mV, because it isn’t one of the commonly published ranges. It sits between the mid-range and higher-end buckets and isn’t a standard value you’d expect to see listed. (These values are in millivolts, not megavolts.)

Open-circuit thermocouple readings are small voltages in the millivolt range, and quick references group them into standard bands so you can estimate temperature without a full lookup. Common reference bands are around 2–4 mV for the lower end, 10–20 mV for the middle range, and 20–30 mV for the higher end. These buckets cover typical open-circuit outputs at different temperatures. The reading that doesn’t align with those standard bands is 15–25 mV, because it isn’t one of the commonly published ranges. It sits between the mid-range and higher-end buckets and isn’t a standard value you’d expect to see listed. (These values are in millivolts, not megavolts.)