What are the criteria and standards for setting the liquid level, flow rate, high alarm values, and low alarm values?
Thread Content
What are the criteria and standards for setting the high and low alarm values for liquid level and flow rate?
Use the normal operating values and critical values as references. For example, if the liquid level is too high, it can cause severe damage to the equipment; therefore, an interlock is installed at a point below the dangerous level, and this interlock quickly reduces the liquid level to prevent such hazards from occurring. It can be set at 90% for interlock purposes, with a normal operating value of 30%; in that case, the alarm value can be set at 60%. The interlock value generally remains unchanged, while the alarm value can be adjusted based on experience in order to avoid fluctuations under normal conditions and prevent frequent alarms. It is also important to consider that if the liquid level reaches the alarm value, it should be possible to make rapid adjustments to lower the liquid level.