What is the maximum allowable difference between pre and post-calibration readings on a dosimeter?

In the context of dosimetry, which involves measuring exposure to hazardous substances, the precision of the instrument is critical. The maximum allowable difference between pre and post-calibration readings is generally established to ensure that the device remains accurate and reliable over time. A difference of 0.5 dB indicates a stringent calibration threshold, adhering to the industry's standards for precision and accuracy.

Having a small allowable difference, such as 0.5 dB, reflects the need for dosimeters to provide consistent readings in environments where exposure levels can significantly impact health. Any larger discrepancy could suggest potential issues with the calibration process, leading to erroneous readings that could endanger worker safety or lead to non-compliance with regulatory standards.

The other options represent larger allowable differences that compromise the dosimeter's accuracy. For instance, a difference greater than 0.5 dB may imply that the instrument has drifted from its calibrated state, which could result in misleading results regarding exposure levels. Thus, maintaining a strict calibration limit, such as 0.5 dB, is essential for effective occupational hygiene monitoring.