FUTEK VCal Sensor Verification - Manual (Page 60)

Futek Advanced Sensor Technology – Futek VCal™Documentation Rev. 1.8.0 07/26/05
©Futek Advanced Sensor Technology 2005 60
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Error The algebraic difference between the indicated and true value of the load being measured. Error is numerically equal to correction but
opposite in sign.
Excitation The voltage or current applied to the input terminals of the transducer.
Hysteresis The maximum difference between the transducer output readings for the same applied load;
one reading obtained by increasing the load from zero and the other by decreasing the load from Rated Output.
Usually measured at half Rated Output and expressed as a percent of Rated Output. Measurements should be
taken as rapidly as possible to minimize Creep.
IEEE Standard 1451.4 (Institute of Electronic and Electrical Engineers) Standard for Plug and Play for Sensors and Signal Conditioning
( http://www.ieee.org )
. ISO International Organization for Standardization. ( http://www.iso.ch/iso/en/ISOOnline.frontpage )
Linearity The closeness of a calibration curve to a specified straight line. Linearity is expressed as the maximum deviation of any calibration point
on a specified straight line during any one-calibration cycle.
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Load Cell A force transducer typically employing strain gages to measure elastic deformation, which produces an output signal that is proportional
to the applied load or force.
Load The weight, torque, pressure or force applied to the transducer.
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Natural Frequency The frequency of free oscillation under no-load conditions.
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NIST National Institute of Standards and Technology ( http://www.nist.gov )
Non-linearity The maximum deviation of the Calibration Curve from a straight line drawn between the No-load and Rated Load outputs, expressed
as a percentage of the Rated Output and measured on increasing load only.
Non-repeatability The maximum difference between transducer output readings for repeated loadings under
identical loading and environmental conditions. .
Operating Temperature The extremes of temperature within which the transducer will operate without
permanent adverse change to any of its performance characteristics.
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Primary Axis The axis along which the transducer is designed to be loaded; normally its geometric centerline.
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Rated Load (Rated Capacity) The maximum Axial Load that the transducer is designed to measure within its specifications.
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Rated Output The signal (voltage) produced by the transducer. Where the output is directly proportional to excitation, the signal is expressed in
terms of (mV/V) of excitation.
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Reference Sensor Sensor, generally having a known, output versus load quality, at a given location or in a given organization, from which
measurements made there are derived. The reference sensor itself must be periodically claibrated.
Repeatability (of results of measurement) Closeness of the agreement between the results of successive measurements of the force carried out
under the same conditions of measurement. Conditions include same procedure, observer, instrument, conditions, and location; and carried
out over a short period of time.
Repeatability Report For the purposes of this Glossary; a document which reports the results of comparing three separate, but identical,
test for closeness of result agreement .