Canadian Council of Independent Laboratories (CCIL) Practice Exam 2026 - Free CCIL Practice Questions and Study Guide

For the calibration of other temperature measuring devices, a reference temperature measuring device is essential because it serves as the standard by which other instruments are evaluated for accuracy and precision. This reference device must be highly accurate and traceable to national or international standards, ensuring that the temperature readings from other devices can be reliably verified against it.

In contrast, while a reference thermometer may seem like a suitable option, it is primarily one type of reference temperature measuring device. The term "reference temperature measuring device" encompasses various tools, including thermometers, digital sensors, and other calibrated instruments that can provide accurate temperature readings.

An online temperature database does not directly assist in the calibration process as it provides values rather than a physical device to compare measurements against. Similarly, a portable calibration device might be useful for specific applications but does not inherently ensure overall reliability and traceability required for broad calibration processes.