Protection
Measurement Types
SKF Multilog On
-Line System IMx-M
2 - 3
User Manual
Accuracy is Relative to API 670 Defined Full Scale
Example:
API 670 defined full scale: Axial position ±1 mm => Accuracy = ±10
µ
m
Incorrect:
Measured value = 52 µm
Input signal = 50 µm
Error = Measured value – Actual value = 52 - 50 µm = 2 µm
Error in % = Error / Input signal => 2 / 50 => 4% error
Incorrect:
Measured value = 0.01 µm
Input signal = 0 µm
Error = Measured value – Actual value = 0.01 - 0 µm = 0.01 µm
Error in % = Error / Input signal => 0.01 / 0 => Infinite
Correct:
Error = Measured value – Actual value = 52 - 50 µm = 2 µm
Error in % = Error / API 670 Full scale = 2 / 1000 => 0.2% error
Measurement Types
Analog Channels
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Combined Measurements
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Complementary Differential Expansion
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Digital Channels
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