What might be a disadvantage of using a mechanical metering device?

Using a mechanical metering device can indeed present the disadvantage of low accuracy in high range applications. Mechanical devices typically rely on physical components, such as gears and springs, to measure flow, temperature, or pressure. These components may not respond as precisely under high ranges compared to electronic devices, which can leverage advanced sensors and digital technology to provide more accurate readings across a wider spectrum of conditions.

In settings where precision is critical, particularly at higher measurement ranges, mechanical devices may be less reliable, leading to potential errors in system assessments or operational adjustments. This inaccuracy can affect performance evaluations and system management, resulting in less optimized operation of HVAC systems. Thus, while mechanical devices can be useful in certain contexts, their limitations in high-range accuracy make them less desirable in situations that demand high precision.