What is the function of a master gauge in relation to fire extinguishers?

The function of a master gauge in relation to fire extinguishers is to calibrate other pressure gauges. A master gauge is a precision instrument that serves as a standard reference point for checking and adjusting the accuracy of other gauges that may be used on fire extinguishers. Ensuring that gauges are accurately calibrated is crucial for maintaining the effectiveness of fire extinguishers, as inaccurate readings can lead to improper assessments of pressure levels. This, in turn, affects the reliability and readiness of the extinguisher in an emergency situation.

While measuring the weight of the extinguisher or indicating the level of the extinguishing agent are important aspects of fire extinguisher maintenance and assessment, these functions are not the primary role of a master gauge. Determining the age of the extinguisher also does not pertain to the function of a master gauge, as age is typically discerned from the manufacturing date or maintenance records rather than from a gauge.