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Technical Manual
5-4
Using parameter values from a previous
calibration
When calibrating with data from a previous calibration the ‘Table calibration’ method
should be used. This is performed by entry of recorded force values and corresponding
transducer signal values into the instrument. The accuracy of the copying procedure is
0.005 %.
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, X:A Value Cal. P2
These parameters are used for entry of recorded force values, expressed in
the measurement unit, from a previous calibration.
X:A Transd. Signal P1, X:A Transd. Signal P2
These parameters are used for entry of recorded transducer signal values for
corresponding calibration points.
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
This parameter is used for entry of the recorded zero offset value from a previous
calibration. If a zeroing has been performed with parameter ‘Set zero’ above, the value
of parameter ‘Zero offset’ need not be changed.
IMPORTANT
Besides the Zero Offset parameter mentioned above there is also a zero correction
value for each input of the Function Block. The zero correction values are stored, in
non-volatile memory, when using the front panel Zero key or communication Zero
function.
The zero correction values are reset (set to zero) when starting a new calibration
procedure.
If the Zero key or the communication zeroing function have been used since the last
calibration, a new zeroing must be done either by using the Set Zero calibration
parameter described above or by using the Zero key or the communication Zero
function.
The Zero key and the communication Zero function will zero all inputs of the Function
Block.
The Set Zero parameter only zero the corresponding input and the user must repeat
zeroing for all configured inputs of the Function Block.