Define a Dangerous Combination of Outputs

This topic describes how to link two or more final elements, which can be hazardous when their outputs are combined. For example, if a pump was functioning (i.e., output) and the downstream valve was closed (i.e., second output) the pump runs the risk of mechanical damage due to overheating, cavitating, or vibrating. If left unattended, the pump could develop a leak which could lead to a larger hazard. This can be defined as a dangerous combination of outputs.

Steps

Access the Protective Instrument Loop Final Element.
Select the Dangerous Combination of Outputs tab.

The Dangerous Combination of Outputs section appears.
In the upper-right corner of the section, select .

The Search window appears.
In the upper-right corner of the window, select .

A list of Protective Instrument Loop Final Elements appears.
Select the check box that corresponds to the Final Element that you want to link, and then select OK.

The selected Protective Instrument Loop Final Element is listed in the Individual Output States section.
In the Potential Dangerous Combination of Outputs Description box, provide a description of the dangerous output, and then select Save.

The two Protective Instrument Loop Final Elements are linked to each other as a dangerous combination of outputs. To link another record to this combination, repeat steps 7-10.