The use of a compensating relay in boiler controls helps to achieve which of the following?

A compensating relay in boiler controls is primarily used for signal bias. This device adjusts the control signal based on various factors, ensuring that the system can maintain the desired operating conditions effectively. In the context of boiler operations, it modifies the input signal from the process measurements to account for variations that might interfere with accurate control.

By introducing signal bias, the compensating relay helps to eliminate errors that could occur due to discrepancies such as changes in feedwater temperature or pressure. This ability to adjust the control signal dynamically ensures that the boiler maintains optimal performance even under varying load conditions or operational parameters.

While the other options describe important functions in boiler control systems, they do not specifically reflect the unique role of the compensating relay. Flow stability, pressure regulation, and temperature maintenance are broader control goals that may involve various other components and systems but do not pinpoint the specific purpose of a compensating relay in signal management.