BLH NOBEL G4-DT, Техническое руководство, Страница: 87 / 194

G4 Multi Channel Weighing Instrument
4-5
Table calibration
Table calibration can be used to copy recorded values from a previous deadweight
calibration of the weighing equipment into a replacement instrument. This is performed
by entry of recorded weight values and corresponding transducer signal values into the
instrument. Calibration can be performed for up to 6 points.
The accuracy of the copying procedure is 0.005 %.
No of Calibration Points
Only parameters for the selected number of calibration points will be displayed in
the menu. The number of calibration points can be changed during the calibration.
Value Cal. P1, Value Cal. P2 etc.
These parameters are used for entry of recorded weight values, expressed in
the measurement unit, from a previous deadweight calibration.
Transd.Signal P1, Transd.Signal P2 etc.
These parameters are used for entry of recorded transducer signal values for
corresponding calibration points.
Set Zero
Set zero is useful only when the scale installation is finished. By the digit keys this
value can be set to zero, for unloaded scale, or to the weight of the known load, for a
scale that is loaded.
Zero Offset
This parameter is used for entry of the recorded zero offset value from a previous
deadweight calibration.
If a zeroing has been performed with parameter ‘Set zero’ above, the value of
parameter ‘Zero offset’ need not be changed.
Deadweight calibration
This is normally the most accurate calibration type. The transducer signals are
measured and automatically stored when the scale is loaded with known weights.
Calibration can be performed in up to six calibration points, starting with the lowest,
the highest point, or any other order.
Calibration of the lowest point is normally performed with the scale unloaded.
If calibration in two points is used, the second point should be placed as high as
possible, the scale should be loaded with at least 2/3 of the ‘Capacity’.
By calibration in more than two points, the highest calibration point should be placed at,
or higher than, the highest load for which the scale is to be used, and the calibration
points should be evenly distributed in the measuring range.
No of Calibration Points
This parameter defines the number of calibration points. Up to six points can be
selected, and parameters for load value and transducer signal will be displayed only
for the selected number of points.
It is possible to change the number of points during the calibration.
Value Cal. P1,
This parameter defines the load for the lowest calibration point. Normally the scale
should be unloaded and the parameter value set to 0 (zero). This weight value and
the corresponding transducer signal value are automatically stored in the instrument.