• Magnetic Environment & Safety
• Magnetic Field Vectors and Components
• Metrolab 2025 NMR Teslameter, 1060 & 1062
Deuterium Probes and their residual H signal
• RoHS and WEEE Compliance
• Comparison of Danfysik 867-400 and LEM IT 400-S current transducers
• Typical Bergoz IPCT Response Time
• Danfysik Current Transducer: "Wrap around" or Distributed Primary Current Cable
• Effects Environmental Magnetic Fields on Model 5451 Hemlholtz Coil Electromagnet
• Bergoz Current Transformer: Power line Fault Detection- Keeping the Electricity flowing in South Africa
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Magnetic Environment & Safety
The
biological effects of AC fields are detectable at much
lower levels than for DC fields. It is therefore inappropriate
to use the AC field Guidelines for DC fields. A good
source of information on DC Fields is the Medical College
of Wisconsin site "Static Electric & Magnetic Fields
and Human Health: Questions
& Answers". Question 20, "Do exposure standards
for static electric and magnetic fields exist?" provides
a good summary of Guidelines for DC Fields. Learn More >
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Magnetic Field Vectors and Components
The magnetic field at any point in space is a vector quantity.
This means there is a direction associated with the field
as well as a field strength. Consider the arrow below:
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The
direction of the arrow can be thought of as the direction
of the magnetic field. The length of the arrow can be
thought of as the strength of the field, i.e. the longer
the arrow, the stronger the field. Call this length B. Learn More >
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Metrolab 2025 NMR Teslameter, 1060 & 1062
Deuterium Probes and their residual H signal
The Metrolab 1060 and 1062 range 6, 7 and 8 NMR Probes
use a heavy water (D20) liquid sample in a
glass vial. The sample has a small amount (less than 1%)
of H20 contamination.
Early in 2000, Michael Duffy improved the rf performance
of the range 8 NMR Probe. The result of this has improved
the sensitivity for both the proton and deuterium resonances
by over 300 percent. In the past, the lower proton resonance
signal from the deuterium probes may have been too weak
to 'lock' the NMR Teslameter. With the probe improvement
and the probable improvement in unshimmed magnet uniformity
it is likely that both the proton and deuterium
resonances will be seen by the automatic tracking circuits
of the NMR Teslameter. Learn More >
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RoHS and WEEE Compliance
The EU’s Restriction of Hazardous Substances (ROHS) Directive 2002/95/EC, often referred to as the "lead free" directive, restricts the use of certain hazardous substances in the design and production of electrical and electronic equipment. It is closely linked with the Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC which sets collection, recycling and recovery targets for electrical goods and is part of a legislative initiative to solve the problem of huge amounts of toxic waste. Learn More >
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Comparison of Danfysik 867-400 and LEM IT 400-S current transducers
The Danfysik 867-400 offers many of the same specifications and is a direct in-kind replacement for the LEM
IT 400-S. Learn More >
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Typical Bergoz IPCT-100mA response time
Test data of the Bergoz IPCT-100mA response time. Learn More >
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Danfysik Current Transducer: "Wrap around" or Distributed Primary Current Cable
GMW offer a “wrap around” Primary Cable with three returns for a 600A Transducer and a similar wrap around Primary Cable for a 2000A Transducer with four returns.The advantages of this wrap around arrangement for high accuracy, broad frequency range measurements are: Learn More >
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Effects of Environmental Magnetic Field on Model 5451 Helmholtz Coil Electromagnet
The Model 5451 Electromagnet is a Coil pair arranged in approximately Helmholtz geometry. It has no magnetic shielding and hence the magnetic field within the central volume is the vector sum of the field created by the Helmholtz Coil and the environmental magnetic fields at the same location.
Learn More >
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Bergoz Current Transformer: Power line Fault Detection- Keeping the Electricity flowing in South Africa
Bergoz Current Transformers have been employed in an interesting application to detect faults in the electricity supply lines in Southern Africa. ABB successfully installed Bergoz CTs recently and the system described below is now operational in the field. Learn More >
Last updated on: 23 June, 2008
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