Vishay G4-DT, Техническое руководство, Страница: 81 / 174

G4 Multi Channel Force Instrument
5-5
Calibration with known forces
When calibrating with known forces applied to the transducers the ‘Known Force
calibration’ method should be used. This is normally the most accurate calibration type.
The transducer signals are measured and automatically stored when the input is
loaded with known force. Calibration of the lowest point is normally performed with the
transducers unloaded (with only fixed tare applied).
The second point should be placed as high as possible. It is recommended to load with
at least 2/3 of the used range.
There are parameters for each input that are used with the current configuration for the
Function Block being calibrated. Function Blocks can be 1 channel (Input A), 2 channel
(Input A - B) or 4 channel (Input A - D) type. Note that only input channel A parameters
are shown in the text below.
X:A Value Cal. P1
This parameter defines the force for the lowest calibration point. Normally the
transducers should be unloaded and the parameter value set to 0 (zero). This force
value and the corresponding transducer signal value are automatically stored in the
instrument.
X:A Value Cal. P2
The transducers should be loaded with known forces. These parameters show the load
according to the previous calibration and the parameter values should be changed to
the value of the known forces. As a parameter value is stored, the instrument will also
store the corresponding transducer signal value for that calibration point.
X:A Transd. Signal P1, X:A Transd. Signal P2
These parameters contain the automatically stored transducer signal values for
the calibration points. The values cannot be edited.
X:A Set Zero
Set zero is useful only when the installation is finished. By the digit keys this value can
be set to zero, for an unloaded input, or to the force of the known load for a loaded
input. Note that unloaded means when the display should show zero.
X:A Zero Offset
For a ready installation this parameter shows the zero offset after zeroing, a value that
should not be edited.