According to Duff and Macintosh , the concept of equipment health monitoring is a simple one.
Monitor the steady state conditions of your equipment. If these characteristics conditions worsen, generate an alarm, investigate the problem and make a correction before the fault becomes so serious that a plant is shut down, production is lost and costs spiral.
Until now this simple concept required sophisticated analysis and analog instruments to achieve this desired outcome.
In many cases the solution could be more expensive than the cure to implement in terms of man-hours and equipment costs versus the lost production costs. Sometimes the instrumentation could only be temporarily applied to the equipment under investigation due to the high cost of the monitoring equipment and the laborious analysis required to investigate the data extracted from the measurements in order to come to a conclusion.
· Temperature loss monitor
· Fluid flow verifier
· Temperature rise detection
· Fluid leak detection
· Mechanical noise detection
· Mechanical wear detection
· Audible noise detection
· Tilt and acute angle detection
· Vibration monitor
These new devices from Honeywell eliminate many problems by simplifying the analysis. The monitoring is reduced to a simple go/no-go digital output and indication from Green to Red indicating drift in the measured characteristic. And the set-up of these devices is simplicity itself!
FREEPORT, Ill., April 28, 2005 - Honeywell [(NYSE: HON)] today introduced Equipment Health Monitoring (EHM) System detectors developed specifically to monitor industrial equipment for operating condition variances that can lead to breakdowns, increased maintenance costs and production stoppages.
The EHM devices monitor the steady state temperature, vibration and other characteristics of equipment and sound an alarm automatically when operating values drift from pre-defined settings. A maintenance engineer alerted to the condition can respond and attempt to correct the condition before it becomes an equipment failure.
Ten detectors are available to monitor the following conditions: temperature loss, fluid flow, temperature rise, mechanical noise, fluid leak, mechanical wear, audible noise, vibration, tilt (slope change) and mechanical insertion.
EHM detectors, by alerting operators to possible problems early, may help prevent essential equipment from shutting down and might help reduce associated maintenance and repair costs.
"The EHM-D-COOL temperature loss detector monitors a steady state temperature and provides an alarm if the desired temperature measurement drops below a set point," explained Leslie Neill, Honeywell Global Industrial Market lead.
“This is particularly useful as an independent monitor of the state of a control system or machine. For example, if the temperature of a chimney drops, it may indicate a boiler has failed."
Another product in the series, EHM-D-VIBRATION detector, monitors a steady state of vibration. Virtually every piece of industrial equipment has some level of vibration. In many cases, a significant increase in vibration level may indicate that something is wrong. Rising vibration may be a sign of loose mountings, worn bearings or a faulty motor.
EHM detectors offer ease of installation - they are ready to be attached directly to equipment and once set up, will begin monitoring for faults immediately. For most envisioned applications, all of the circuitry and "know how" to monitor equipment is built into the components.