Fume hood in Emergency Purge Mode for longer than expected

Objective/Method/Outcome

Objective: Determines if the Emergency Purge Mode for Fume Hood is on for more than 8 hours a day.

Method: Monitors the Emergency Purge Mode and checks the amount of time Purge Mode was ON.

Outcome: If the Purge Mode is on for longer than acceptable, an insight is generated.

Applicable System

Fume Hood

Description

Monitor the Emergency Purge Mode TL and generate an Insight if Purge Mode is ON for more than 8 hours a week.

This rule is part of the CopperTree Standard rule-set.

Diagnosis

  1. Purge Mode may be manual. Review control.

Message

Emergency Purge Mode is ON for a prolonged period of time. Please review control.

Rule Template

Insight Type: Fault Detection

Trigger Type: Active High

Default Priority

High

Logic

Logic for determining if Purge Mode was ON for longer than expected

Inputs

InputUnitTagsDescription
Emergency Purge ModeEmergency Purge ModeEmergency Purge Mode for the hood
Insight Threshold – Allowable HoursHrThe acceptable amount of time the Purge Mode can be ON without triggering an insight

Notes

Defaults Used:

Threshold: Acceptable Weekly Hours High Limit for Emergency Purge Mode Operation = 8 hours

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