PRESSURE SOURCE WITH CONSTANT RELATIVE INCREASE OF PRESSURE AND METHOD FOR DIAGNOSING SAFETY VALVES FOR OVER OR UNDER PRESSURE

摘要

The invention relates to a method and apparatus for determining the switchin g pressure of a safety appliance which is adapted to safeguard an installation against exceeding or falling below a gas pressure, wherein an increasing pressure is applied to the safety appliance (1), wherein the supplied increasing pressure rises in accordance with an exponential function. Owing to the constant relative increase in the pressure supplied to the safety appliance, it is no longer necessary beforehand to take into account setting s of the safety appliance. Errors resulting from incorrect settings by the use r are hereby prevented.