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Checking a Temperature Probe on Reversal 4 questions
Checking a Temperature Probe on Reversal
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A lab uses two temperature probes to monitor a stirred water bath. The fast reference probe gives the bath’s temperature at each reading. A slower probe has a thick protective cover. Heat must pass through the cover before the sensor can respond. A probe passes the lab’s operating rule only if each reported temperature differs from the reference by at most 1.0 °C.
| Bath condition | Reference probe (°C) | Covered probe (°C) |
|---|---|---|
| Warming | 30.0 | 27.0 |
| Held at 30.0 °C | 30.0 | 30.0 |
| Cooling | 30.0 | 33.0 |
Question 1
Which condition gives a passing covered-probe reading under the rule?
- Warming only
- Held at 30.0 °C only
- Cooling only
- All three conditions
Question 2
Calculate the signed error of the covered probe during warming and during cooling. Define error as covered minus reference.
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Question 3
A technician proposes adding 3.0 °C to every covered-probe reading. Use the record to decide whether that correction would meet the rule during both changing conditions.
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The lab can install a thinner cover made of the same material. The lab wants to check whether it improves the probe’s response while the bath temperature is changing.
Question 4
Describe how to compare the thin and thick covers under the same warming and cooling conditions. State how the lab would decide whether the thin cover meets the rule.
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