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Portable microhardness tester is statistical process control compatible
- N e w equipment Portable microhardness tester is statistical process control compatible The Microdur 2 from Wells Krautkramer is a portable microhardness tester with an operating range from 5 to, 1000 Vickers hardness number using its standard probe with a 5 kg indenting force and wear free diamond pyramid probe tip. Other probes are available to extend the range further. Readings are displayed to four significant figures. Vickers, Rockwell A, B, C, F, or Knoop scales may be selected. Measuring accuracy exceeds existing DIN, ISO and ASTM standards for conventional hardness testers: resolution is to one hardness number in Vickers or Knoop; 0.1 in Rockwell scales. Probe loading of 5 kg, applied manually, is sufficiently high to achieve a mean hardness rather than an individual grain hardness reading for most materials including cast iron; yet low enough to be regarded as a true microhardness test from penetration standpoints.
Portable microhardnesstester with d a t a logger from Wells Krautkramer A probe length of 153 mm and a compact angled probe connector permit testing in confined areas. The instrument uses the industry standard ultrasonic contact impedance method of measurement. Here, hardness is calculated from the change in resonant frequency of a rod vibrating at ultrasonic frequencies,
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when it is damped by the area of contact of its probe tip embedded into the surface of the material under test.
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The unit is programmed to return to its default setting, for steel, each time it is switched on. Calibration settings for different materials may also be stored in memory to be retrieved as necessary. Reproducibility of test results between operators is thereby ensured. Up to 3000 readings can be stored into the data logger built into the instrument, and printout of this stored information shows the instrument calibration relating to each result as well as the hardness readings obtained.
Wells Krautkramer, Blackhorse Road, Letchworth, Herts, SG6 1HF, UK
Portable magnetometer The DSF-1 magnetometer from Baugh and Weedon has been designed for use in magnetic particle crack detection. The hand-held, battery powered instrument measures the peak density of magnetic flux by simply applying a probe to the subject surface during magnetizing. This measurement is shown in Teslas on an LCD display. British Standard BS6072 - Magnetic Particle Flaw D e t e c t i o n stipulates that the level of magnetic flux density should be at least 0.72 T for effective magnetic crack detection. At levels lower than this sensitivity is reduced; at levels much higher, contrast is diminished due to over magnetization, which obscures defect indications. The instrument measures the magnetic flux actually in the subject and is not affected, as the Hall Effect method is, by stray magnetic fields in the air around
Hand-held magnetometerfrom Baugh and Weedon
the subject. Not only can flux density be determined but also flux direction. The unit is suitable for use with bench type magnetizing units, portable magnetic crack detectors and AC yokes.
Baugh and Weedon Ltd, Beech Business Park, Tillington Road, Hereford, HR4 9Q J, UK
Ultrasonic corrosion monitoring system A corrosion monitoring system which combines ultrasonic thickness measurement and bar coding to enable fingerprinting and monitoring of critical potential corrosion points on pipework and other structures has been introduced by Sonomatic. The CMS comprises a Husky microcomputer, a portable thickness meter, a light pen and a number of bar-coded metal tags. In the initial fingerprint inspection, tags are attached and thickness is measured at critical points. The tag is scanned with the light pen such that location is logged and automatically recorded with the appropriate
NDT nternational August 1989
Portable microhardnesstester with d a t a logger from Wells Krautkramer A probe length of 153 mm and a compact angled probe connector permit testing in confined areas. The instrument uses the industry standard ultrasonic contact impedance method of measurement. Here, hardness is calculated from the change in resonant frequency of a rod vibrating at ultrasonic frequencies,
254
when it is damped by the area of contact of its probe tip embedded into the surface of the material under test.
i i ¸ ....
iil ili!;!ii !iiii,/!
m
The unit is programmed to return to its default setting, for steel, each time it is switched on. Calibration settings for different materials may also be stored in memory to be retrieved as necessary. Reproducibility of test results between operators is thereby ensured. Up to 3000 readings can be stored into the data logger built into the instrument, and printout of this stored information shows the instrument calibration relating to each result as well as the hardness readings obtained.
Wells Krautkramer, Blackhorse Road, Letchworth, Herts, SG6 1HF, UK
Portable magnetometer The DSF-1 magnetometer from Baugh and Weedon has been designed for use in magnetic particle crack detection. The hand-held, battery powered instrument measures the peak density of magnetic flux by simply applying a probe to the subject surface during magnetizing. This measurement is shown in Teslas on an LCD display. British Standard BS6072 - Magnetic Particle Flaw D e t e c t i o n stipulates that the level of magnetic flux density should be at least 0.72 T for effective magnetic crack detection. At levels lower than this sensitivity is reduced; at levels much higher, contrast is diminished due to over magnetization, which obscures defect indications. The instrument measures the magnetic flux actually in the subject and is not affected, as the Hall Effect method is, by stray magnetic fields in the air around
Hand-held magnetometerfrom Baugh and Weedon
the subject. Not only can flux density be determined but also flux direction. The unit is suitable for use with bench type magnetizing units, portable magnetic crack detectors and AC yokes.
Baugh and Weedon Ltd, Beech Business Park, Tillington Road, Hereford, HR4 9Q J, UK
Ultrasonic corrosion monitoring system A corrosion monitoring system which combines ultrasonic thickness measurement and bar coding to enable fingerprinting and monitoring of critical potential corrosion points on pipework and other structures has been introduced by Sonomatic. The CMS comprises a Husky microcomputer, a portable thickness meter, a light pen and a number of bar-coded metal tags. In the initial fingerprint inspection, tags are attached and thickness is measured at critical points. The tag is scanned with the light pen such that location is logged and automatically recorded with the appropriate
NDT nternational August 1989