August 2016Maintenance, Test & Measurement, Calibration
Vibration and temperature are the most common parameters used for machinery protection. Of these, temperature has been used longer, probably because it was available first and was better understood than vibration analysis. However, it is now stated that vibration it the better measurement over temperature because it gives an earlier warning and more information as the vibration signal contains many frequencies and many amplitudes, each pertaining to some moving part of the machine.
The latest units available in the RC range now combine these two parameters and provide protection of critical plant from high temperature and high vibration levels. The unit consists of a 2-wire 4-20 mA output to monitor vibration levels and a DC voltage output that has a 10 mV per °C directly proportional to the measured temperature and not an inferred measurement of the vibration.
Different velocity (mm/sec) ranges, process connection and electrical connections are available. The standard unit, which covers most applications, would have a vibration range of 25 mm/sec RMS, an 8 mm stud process connector and a 3 m cable connection. The unit’s environmental rating is IP 67 and it has a case material of stainless steel with a top cable entry.
The unit can also be supplied with a local IP67 control box to give on-plant indication of both temperature and vibration. Both process variables have their own alarms along with 4-20 mA retransmission and local 24 VDC supply to provide the transducer power. The local control box requires a 90-260 VAC or DC power supply and gives temperature and vibration indication with a high and trip alarm facility.
Oils don’t die, they degrade Wearcheck
Maintenance, Test & Measurement, Calibration
WearCheck explores the main ways lubricants degrade in service and how these degradation modes affect oil performance and machine reliability.
Read more...Real-time spectrum analyser Vepac Electronics
Maintenance, Test & Measurement, Calibration
The PXE series real-time spectrum analyser covers frequencies up to 20 GHz with a 100 MHz analytical bandwidth and ultra-fast sweep speed, supporting spectrum monitoring, interference finding and RF test and measurement functions.
Read more...Preserving a French heritage landmark Omniflex Remote Monitoring Specialists
Maintenance, Test & Measurement, Calibration
Omniflex supplied a remotely monitored impressed current cathodic protection system for the Perret Tower in Grenoble, a protected French heritage site, combining 24/7 corrosion protection with integrated surge protection against lightning strikes.
Read more...Operational efficiencies and safety compliance with preventive maintenance programmes
Maintenance, Test & Measurement, Calibration
Konecranes explains how its Lifecycle Care Preventive Maintenance programme reduces unexpected downtime, improves safety compliance and delivers measurable financial benefits for operators of cranes and lifting equipment across any make or sector.
Read more...Portable appliance tester Vepac Electronics
Maintenance, Test & Measurement, Calibration
Vepac Electronics’ new portable appliance tester enables precise safety testing of electrical appliances in accordance with DGUV regulation 3 and BetrSichV, with simple three-button operation and battery-powered mobility.
Read more...Why lubrication fails in mining and what to do about it
Maintenance, Test & Measurement, Calibration
Lubrication Engineers explains the recurring failure points behind mining lubrication problems and how the right product, storage and application practices can improve equipment reliability.
Read more...When digital twins move from concept to critical tool
IT in Manufacturing System Integration & Control Systems Design Maintenance, Test & Measurement, Calibration
Digital twins are moving out of the lab and onto the mine, the factory floor and the transport network where they predict failures before they happen. Amritesh Anand looks at where they earn their keep, the data and integration work behind them, and the security questions every organisation should ask before switching one on.
Read more...Why asset level intelligence is now essential for resilient wastewater plants Schneider Electric South Africa
Maintenance, Test & Measurement, Calibration
Sub-Saharan Africa’s wastewater operators face mounting pressure to keep ageing plants running smoothly and meet tougher environmental standards, all while lacking visibility into the health of their medium-voltage (MV) drives and other critical rotating assets. Adding predictive analytics, digital twins and enterprise dashboards enables optimisation across multiple sites, ensuring every drop moves safely and efficiently through the water cycle.
Read more...How multiple boilers can minimise costly downtime
Maintenance, Test & Measurement, Calibration
Associated Energy Services explains how multi-boiler systems reduce downtime risk for South African manufacturers, covering redundancy planning, fuel source diversification and the strategic management of backup boiler capacity.
Read more...Field calibration made easy Instrotech
Maintenance, Test & Measurement, Calibration
Instrotech’s locally designed and manufactured Calog calibrator range feature a rugged IP54-rated housing, backlit display with data logging via SD card, and a lithium-ion battery with approximately eight hours of run time.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version