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Crack tester widens range
surface-finish measurement on their production lines. These portable, battery-powered instruments, the eddytector and the Minitector, are made by Elcometer Instruments. The Minitector measures thickness of non-ferromagnetic coatings on a ferrous base (Fig.2). It measures, in three ranges, from 0 - 5 0 0 / a m , down to 2.5/am, with an accuracy of 5%. Its dimensions are 135 x 75 x 65 mm and it weighs 0.76 kg. The Eddytector measures the thickness of non-conductive coatings on a non-ferrous base. It measures, in four ranges, from 0 - 5 mm with an
accuracy, down to 2.5 #m, o f 5%. Its dimensions are 120 x 95 x 23 mm. The Rolls Royce cars, the Silver Shadow and the Corniche have steel coach work with aluminium doors, boot and bonnet. Rolls Royce use ten main finishing stages on the coachwork including dip priming, three epoxy filler coats and two colour coats. The coachwork is rubbed, snagged and washed after each preparatory coat and then inspectors check for variations in coating thickness. Elcometer Instruments Ltd, Edge Lane, Droylsden, Manchester, M35 6BU, UK
Fig.2 An instrument to measure the thickness of non-ferromagnetic coatings on a ferrous base
NEW EQUIPMENT Vibrations amplified
Frequency sweep
Dawe Instruments have added an amplifier module to their modular vibration monitoring sys tern 1440 (Fig. 1). Tile amplifier, the 1440-11A, will amplify a signal from an accelerometer mounted on rotational machinery. It will amplify voltage signals from moving-coil accelerometers for 0 - 5 0 kHz and above. An alarm may be set and connexions are provided for additional signal processing. Six modules may fit in the standard 483 mm rack unit. The module weighs 0.9 kg.
An American company has announced details of a swept-frequency eddycurrent instrument (Fig.3). The instrument goes through any chosen range of 10 or 20 Hz between 100 Hz and 100 kHz. The results are plotted on an x-y plotter with response against frequency. The probes are noncontacting and have variable-fdlfactor test coils.
Dawe Instruments Ltd, Concord Road, Western Avenue, London W3, UK Fig.2
A crack detector to reassess scrap
Crack tester widens range Teledictor have added a magneticparticle crack detector to their range of equipment (Fig.2). This crack detector is designed for ferrous metal components up to 450 mm long. Teledictor made this equipment to be complementary to their automatic eddycurrent systems. Parts rejected by such systems may be reassessed by hand with a magnetic-particle tester and reclaimed where the cracks are not critical. The tester runs off a 240 V, 24 A, 5 0 - 6 0 Hz supply and has an output of 2 000 A ac. Fig. 1 A voltage amplifier to fit in a modular system for vibration analysis
Teledictor Ltd, Groveland Road, Tipton, Staffs, UK
NON-DESTRUCTIVE T E S T I N G . OCTOBER 1972
The instrument is an addition to the Verimet range. The apparatus was designed as an aid to production to speed the analysis of process problems. Signal lights and gates are included and it can be adapted for seam detection analysis. K. J. Law Associates, 26325 West Eight Mile Road, Detroit, Michigan 48240, USA
Fig.3 An American instrument for analysis by swept-frequency eddy current
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accuracy, down to 2.5 #m, o f 5%. Its dimensions are 120 x 95 x 23 mm. The Rolls Royce cars, the Silver Shadow and the Corniche have steel coach work with aluminium doors, boot and bonnet. Rolls Royce use ten main finishing stages on the coachwork including dip priming, three epoxy filler coats and two colour coats. The coachwork is rubbed, snagged and washed after each preparatory coat and then inspectors check for variations in coating thickness. Elcometer Instruments Ltd, Edge Lane, Droylsden, Manchester, M35 6BU, UK
Fig.2 An instrument to measure the thickness of non-ferromagnetic coatings on a ferrous base
NEW EQUIPMENT Vibrations amplified
Frequency sweep
Dawe Instruments have added an amplifier module to their modular vibration monitoring sys tern 1440 (Fig. 1). Tile amplifier, the 1440-11A, will amplify a signal from an accelerometer mounted on rotational machinery. It will amplify voltage signals from moving-coil accelerometers for 0 - 5 0 kHz and above. An alarm may be set and connexions are provided for additional signal processing. Six modules may fit in the standard 483 mm rack unit. The module weighs 0.9 kg.
An American company has announced details of a swept-frequency eddycurrent instrument (Fig.3). The instrument goes through any chosen range of 10 or 20 Hz between 100 Hz and 100 kHz. The results are plotted on an x-y plotter with response against frequency. The probes are noncontacting and have variable-fdlfactor test coils.
Dawe Instruments Ltd, Concord Road, Western Avenue, London W3, UK Fig.2
A crack detector to reassess scrap
Crack tester widens range Teledictor have added a magneticparticle crack detector to their range of equipment (Fig.2). This crack detector is designed for ferrous metal components up to 450 mm long. Teledictor made this equipment to be complementary to their automatic eddycurrent systems. Parts rejected by such systems may be reassessed by hand with a magnetic-particle tester and reclaimed where the cracks are not critical. The tester runs off a 240 V, 24 A, 5 0 - 6 0 Hz supply and has an output of 2 000 A ac. Fig. 1 A voltage amplifier to fit in a modular system for vibration analysis
Teledictor Ltd, Groveland Road, Tipton, Staffs, UK
NON-DESTRUCTIVE T E S T I N G . OCTOBER 1972
The instrument is an addition to the Verimet range. The apparatus was designed as an aid to production to speed the analysis of process problems. Signal lights and gates are included and it can be adapted for seam detection analysis. K. J. Law Associates, 26325 West Eight Mile Road, Detroit, Michigan 48240, USA
Fig.3 An American instrument for analysis by swept-frequency eddy current
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