Networked fume hood monitoring system

• US 5,562,537 A
• Filed: 05/11/1995
• Issued: 10/08/1996
• Est. Priority Date: 05/11/1995
• Status: Expired due to Term

• Current Assignee: Siemens Industry Incorporated (Siemens AG)
• Original Assignee: Landis & Gyr Powers, Inc. (Landis+Gyr Group AG)
• Inventors: Zver, Ronald J., Jacob, Steven D.
• Primary Examiner(s): Joyce, Harold
• Application Number:
  US08/439,354
• Time in Patent Office: 516 Days
• Field of Search: 454/58, 454/59, 454/61
• US Class Current: 454/61
• CPC Class Codes: B08B 15/023 Fume cabinets or cupboards, e.g. for laboratories
• CPC Class Codes: G01N 1/26 with provision for intake from several spaces
• CPC Class Codes: G01N 33/0075 for multiple spatially distributed sensors, e.g. for environmental monitoring transmission systems for measured values G08C
• CPC Class Codes: G08B 21/14 Toxic gas alarms G08B21/16 takes precedence

Abstract

A system for monitoring the operation of laboratory fume hoods includes a local area network for transferring data representing alarm conditions, and other special functions, to a building supervisory control system. The system has a calibrating capability which is adapted to build a database of the operating parameters of the fume hood which can be used to detect any degradation of the operation of the fume hood.

Claims

1. A monitoring system for laboratory fume hoods, the monitoring system implementing a communication capability for networking the monitored information to a central location of a building supervisory control system, the central location controlling a plurality of special functions consisting of turning on/off lights throughout the building based on a determined emergency condition in the fume hood, activating an alarm for the entire building based on a determined emergency condition in the fume hood and providing notification to a superintendent as to whether the fume hood is or is not in use, the monitoring system comprising:

means for measuring predetermined parameters related to the fume hood and for determining an emergency condition in the fume hood based on said measured predetermined parameters; and

means, based on the measured predetermined parameters related to an emergency condition in the fume hood, for notifying the central location to activate one of said plurality of special functions.

2. The monitoring system of claim 1 wherein said means for measuring predetermined parameters related to the fume hood further comprises means for measuring the minimum and maximum face velocity of the fume hood.

3. A monitoring system for laboratory fume hoods, the monitoring system implementing a communication capability for networking the monitored information to a building supervisory control system, the building supervisory control system controlling a plurality of special functions consisting of turning on/off lights throughout the building based on a determined emergency condition in the fume hood, activating an alarm for the entire building based on a determined emergency condition in the fume hood and providing notification to a superintendent as to whether the fume hood is or is not in use, the monitoring system comprising:

means for measuring at least one of either the minimum face velocity of the fume hood or the maximum face velocity of the fume hood to determine if an emergency condition in the fume hood exists; and

means, based on the measurement, for notifying the building supervisory control system to activate one of said plurality of special functions.

4. A monitoring system for laboratory fume hoods, the monitoring system implementing a communication capability for networking the monitored information to a building supervisory control system, the building supervisory control system controlling a plurality of special functions, the monitoring system comprising:

means for measuring at least one of either the minimum face velocity of the fume hood or the maximum face velocity of the fume hood to determine if an emergency condition in the fume hood exists; and

means, based on the measurement, for notifying the building supervisory control system to activate one special function from the group of special functions consisting of turning on/off lights throughout the building based on a determined emergency condition in the fume hood, activating an alarm for the entire building based on a determined emergency condition in the fume hood and providing notification to a superintendent as to whether the fume hood is or is not in use.