Two Minute Tips
Safety in Thermal Imaging
Across the world the approach to safety is quite varied, and one can easily become complacent if you do not take a wider view of it. In many forums, regardless of the engineering discipline or matter of social interest, there will be varying views about what is acceptable in terms of safety or what should be common knowledge.
- PJ Cloete
- AVT Reliability
How To Check Motor Winding Resistance On Single & Three-Phase Motors
Motor Circuit Analysis™ (MCA™) is a test method that determines the true state of health of 3 phase & single-phase electrical motors. MCA™ checks the motors coils, rotor, connections, and more. MCA™ can verify ac motor winding resistance as well as dc motor resistance and determine state of health.
- Mark Koch
- ALL-TEST Pro, LLC
Nonmelting Grease for High-Temperature Bearing Applications
Bearings operating in or near heat-generating equipment are subject to temperatures that cause ordinary greases to melt and run, leaving critical bearing surfaces unprotected. A reliable long-lasting grease that can withstand extreme heat is needed to extend re-greasing intervals and prevent premature bearing failures.
- John Sander
- Lubrication Engineers
Online Monitoring Systems | How to choose?
Online monitoring is the process of utilizing permanently mounted sensors to regularly check the condition of a machine. Online monitoring should consist of more than just vibration sensors. Given there are many different failure modes it is best to utilize a variety of sensor types to monitor the necessary variable to ensure early warning of failure.
- Dr. M. David Howard
- Erbessd Instruments
Steam Trap Testing
Reduce Energy Costs and Increase Process Stability with Ultrasonic Testing Equipment. Regular inspections of production equipment are essential in preventive maintenance. Early detection of damage or signs of wear leads to increased plant availability and also saves enormous costs. Is the steam trap working correctly or is it defective? Digital ultrasonic testing technology provides the answer. Energy losses are reduced and process stability is increased.
- Steffen Moeck
- SONOTEC
Warning Signs of Pump Cavitation
Pumps are critical pieces of equipment in a large variety of industrial settings. Although they are routinely monitored as part of a facility’s CBM program, the data captured in this way isn’t always enough to identify the signs of early-stage pump cavitation. Vibration data can provide valuable insight into the pump’s condition, and with the right monitoring setup can help you identify developing cavitation before serious damage or failure occurs.
- Elise Brannon
- Wilcoxon Sensing Technologies
The Importance of Balancing a Turbo
Internal combustion engines use turbochargers as a way to output more power. Some turbocharger impellers can reach speeds up to 300,000 rpm.
Unbalance at high speed generates vibration that will not only reduce the engine performance, but may eventually cause permanent damage to the whole system. Needless to say, turbo balancing machines are important in maintenance activities for turbocharger systems to work in optimal conditions.
- Dr. M. David Howard
- Erbessd Instruments
Stator Inter-Turn Stress with Electrical Signature Analysis in Variable Frequency Drive Applications
Incorrect settings in a Variable Frequency Drive (VFD) application have an impact on the windings of an electric motor. When a drive is not set correctly, or not tuned when not using straight volts/hertz settings, stresses occur between the turns in a winding. In some cases, this will appear as small Partial Discharges (PD), and in others it can be increased leakage between turns. When these conditions occur, they introduce small current discharges that effect the air gap magnetic field of the motor.
- Howard Penrose
- MotorDoc LLC
Resonance & Natural Frequency
Have you ever tried to balance a fan and its vibration won’t go down? No matter what you do, do you know what Resonance is?
3 Tips to diagnose Resonance and 6 ways to correct it below.
- Dr. Thierry Erbessd
- Erbessd Instruments