Somat eDAQ
lite
64
I2773-4.4 en
which represents the linear relationship of engineering units to the input signal. Define
either two calibration points (values) or one calibration point (value) and a calibration
slope (span).
With the two calibration steps properly defined, select Calibrate to perform the actual
calibration. Upon completion, TCE sets the calibration date to the current date and
disables the parameters related to calibration.
General Calibration Modes
Select one of four available calibration modes for generic transducers.
NOTE
For ELHLS and ELBRG input channel types, TCE supports the option to perform
parallel calibrations if the calibration is defined with either two external values or one
external value and one defined span. If multiple channels have this calibration
definition, TCE asks if the calibrations should be performed in parallel or serially.
Example Calibration
Suppose an inductive pickup is used on a flywheel with 180 pickups. To output RPM, calibrate the channel with the following
definitions:
•
Defined Value : Eng Units [0 RPM] == Sig Units [0 Hz].
•
Defined Span : Eng Units [60 RPM] == Sig Units [180 Hz].
Shunt Span Modes
Low level signal conditioner transducers (ELBRG and Strain SMART Module) offer
additional mode options. These modes are all based on an internally applied shunt
resistor to simulate strain or load.
Cal Mode Description
External Value Define a single point on the calibration line. When prompted during the
actual calibration run, apply the transducer signal value equivalent to
the specified engineering units value. The eDAQ
lite
measures the
signal value.
External Span Define the slope of the calibration line. When prompted during the
actual calibration run, apply two transducer signals that differ by the
specified engineering units value. The eDAQ
lite
measures the two
signal values and computes the slope of the calibration line in
engineering units per signal units.
Defined Value Define a single point on the calibration line. Enter both the transducer
signal value and the engineering units equivalent.
Defined Span Define the slope of the calibration line. Enter both the transducer signal
value span and the engineering units equivalent of the span.
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