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Danfysik Current Transducers, 860 & 862
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What
is the overall accuracy of the 860R System?
The basic overall accuracy of the Danfysik
860R Current Transducer System is defined as the sum of
three different specifications:
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Absolute
Calibration (@ 25°C) |
<50ppm |
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DC
Accuracy Vs. Temperature |
<±1ppm/°C |
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DC
Offset Vs. Temperature |
<±0.5ppm/°C |
So, for every degree Celsius difference
from 25°C, the absolute calibration may change by
as much as ±1.5ppm per degree celsius.
This is then further complicated by
time dependent drift (aging) of the electronics, and the
sensitivity of the transducer head to the center conductor
position and sensitivity to any external magnetic fields.
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DC
Accuracy Vs. Time |
<±1ppm/Month |
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DC
Offset Vs. Time |
<±1ppm/Month |
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Conductor
Position Sensitivity |
<0.3ppm/mm |
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Magnetic
Field Coefficient (Axial) |
<±2ppm/mT
(860R-600), <±0.1ppm/mT (860R-2000) |
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Magnetic
Field Coefficient (Radial) |
<±5ppm/mT
(860R-600), <±1ppm/mT (860R-2000) |
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