Condition Monitoring/Predictive Maintenance

SPM Instrument releases cutting-edge portable instruments for extreme EX zones

spm-april-14-3SPM Instrument, the leading provider of condition monitoring technology, now announces the launch of Leonova Diamond®IS and Leonova Emerald®IS. IECEx and ATEX certified, these new arrivals from SPM provide sophisticated condition monitoring capabilities for potentially explosive industrial environments, including zones 0, 1 and 2.

SPM Instrument launches Condmaster Ruby 2014 Edition Condmaster Ruby

spm-april-14-2In conjunction with the release of the Leonova Diamond IS and Leonova Emerald IS instruments, SPM Instrument also introduces Condmaster Ruby 2014 Edition. Now delivered in 32 and 64-bit versions, this new version of the comprehensive condition monitoring and predictive maintenance program provides support for the new functions in the powerful vibration analysis package of the Leonova instruments.
Condmaster Ruby® 2014 Edition comes with added functionality to support new functions in the portable instruments Leonova Diamond® and Leonova Emerald® and their new IS (Intrinsically Safe) versions.


flir-march-20141FLIR thermal imaging cameras are now tools of the trade, everyday instruments for fast and cost-effective fault finding.  And it is this change of emphasis that has prompted FLIR Systems to broaden the scope of its product range.  

The company is now applying its hallmark quality design and build to a brand new range of test and measurement tools.  These are premium products with innovative features that make them stand out from the crowd.  

SolarWorld GT at the finish line with SHAFTALIGN

sep-2013-4aPRÜFTECHNIK Alignment Systems supports electromobility.

The solar-powered vehicle “SolarWorld GT” has returned to Bochum after its journey around the world. PRÜFTECHNIK Alignment Systems supported this world record by providing a SHAFTALIGN alignment system to the University of Bochum.
The measuring device, based on laser technology, enabled optimal alignment of the test bench for the wheel hub motors used in the SolarWorld GT.Testing and development of the motors on the test bench made it possible to maximize the efficiency of the drive system for the solar vehicle. 29,710 km – on 177 days of driving – that was the reading on the odometer at the end of the trip around the world.

Laser shaft alignment goes mobile with tab@lign

sep-2013-3bNow presenting its new laser alignment solution for Apple and Android mobile devices - breaking new grounds in the world of shaft alignment.

tab@lign, a unique tablet-based solution for shaft alignment, offers unprecedented mobility, connectivity and convenience, bundled with the precision and quality of alignment systems from PRÜFTECHNIK.

"Within the maintenance world, we see a strong trend with tablets moving more and more to the foreground. In order to meet the customers’ expectations of tomorrow we saw it as the right time to introduce the very first tablet-based shaft alignment system", says Michael Stolze, Managing Director PRÜFTECHNIK Alignment Systems.(Or Brian Forrest, MD…. PRUFTECHNIK UK Ltd)

Expert modules offer new capabilities - ROTALIGN Ultra iS – the intelligent machine alignment system

sep-2013-2PRÜFTECHNIK Alignment Systems presents the proven ROTALIGN Ultra iS (intelligent System). In addition to shaft alignment, sensALIGN, the new sensor generation also features new capabilities for the measurement of system geometries.

sensALIGN can be used for easy and precise measurement of the flatness of flanges or foundations, right angles of planes or axes and many other geometric applications.

The High Definition Position Sensitive Detector (HD PSD), in combination with the 7-axis measurement system, opens up a plethora of possibilities. Built-in intelligence ensures reliable measurements at all times. Expert modules such as Live Trend, Multiple coupling, Vibration Acceptance Check and RFID for machinery offer added value for every maintenance department.

SPM Instrument presents Leonova Emerald

spm-april-14-1SPM Instrument, Sweden, today announces the launch of Leonova Emerald®, a new data collector in the Leonova line of portable instruments and sibling to the Leonova Diamond® released in October, 2012.
Leonova Emerald® comes with the patented and award-winning SPM HD® measuring technique for condition monitoring of rolling element bearings. Capable to reliably measure machine condition in the 1-20.000 RPM range, the method brings to light machine problems which are impossible to monitor with traditional vibration measurement techniques.

New Baker DX Motor Analyser

ap 30 3The new Baker DX series of static motor analysis equipment from SKF replaces older-generation Baker D-series and ST series surge test analysers. The DX is ideal as an entry level instrument for performing motor and generator analysis in areas such as industrial motor test/maintenance, motor servicing and OEM manufacturing.

The SKF Static Motor Analyser, Baker DX offers wide capabilities to analyse all insulation and motor circuits in AC and DC motors, generators and coils.

The lightweight, portable instruments can carry out low-voltage inductance, impedance, phase angle and capacitance, coil, DC step voltage, winding resistance, Megohm, DC Hipot, surge and DC bar-to-bar armature tests.

Startup Transients – Two Case Studies of Reduced-Voltage Starters

whiteleggpic6by Dave Olinger and Ernesto Wiedenbrug, Ph.D.
This paper discusses how voltage and current captures of motors starting at line frequency can be used to diagnose high resistance contact problems, and even  detect whether these problems are up-stream or down-stream from where the  measurements were taken [1-2]. These concepts are applied on startup transient   captures of two 8-pole 100hp motors which are started via 80% reduced-voltage  autotransformers (Fig. 1) [3]. One motor shows a high resistance contact below the  point of measurement, and the other transient capture was used to diagnose a  problem in the autotransformer, which has been verified to be shorts in the  transformer.
To continue reading the full case study, with images, please download the free PDF file here.
To contact Whitelegg direct please visit  

FAQ: Output voltage of a VFD has ‘flat’ spots – is it a problem?

whitelegg pic 5Ernesto Wiedenbrug, Ph.D.
The voltage waveform to the left in Fig 1 looks normal, but at another point in time it looks like the waveform to the  right of Fig. 1; where the waveform stays constant on the top and the bottom. What is going on? Is this a problem?
VFDs don’t only change the frequency of the voltage, but also the voltage level in proportion with the frequency.
Comparing the frequencies:
Both plots show two complete cycles for the voltage waveforms; the one to the left takes 46.1ms for two cycles – which  means 43.4Hz, and the one to the right takes only 41.7ms, which means that the VFD is running at 48Hz. According to the Volts per Hertz control technique [1], this means that the VFD output voltage needs to be almost 10% higher for the waveform to the right.
To continue reading the full case study, with images, please download the free PDF file here.'flat%20spots'.pdf
To contact Whitelegg direct please visit  

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