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...3 CONFIGURATION LEVEL
3.6 Scale Adjustment Page
Information.
•
Scale Adjustment Reset – removes any previously programmed offset or scale
adjustment settings.
•
System offset errors – can be removed using Offset Adjustment.
•
System scale errors – can be removed using Span Adjustment.
•
Offset/Span Adjustment – can be used to perform spot calibration.
Switch off the power supply. Connect accurate signal sources, suitable for simulation over the
entire input ranges, in place of the raw product process connections (terminals 13 and 14) and
pasteurized product process connections (terminals 16 and 17).
As a general rule, spot calibration values should be:
< 50% of range span value when using Offset Adjustment parameters.
> 50% of range span value when using Span Adjustment parameters.
SCALE
AdJUSt
r–rSt
no
r–OFS
––––
r–SPN
––––
16
Page header – Scale Adjustment
Raw Input Scale Adjustment Reset
Set YES and press
and span values to their nominal values. dONE is displayed
to indicate that these parameters have been reset.
Raw Input Offset Adjustment
Apply the correct input for the spot calibration required.
Note. The displayed units are engineering units.
Set the value required. The decimal point position is set
automatically.
Example – If the display range is 0.0 to 20.0 and a spot
calibration is required at 5.0 and 15.0, inject a signal
equivalent to 5.0 and set the display to 5.0.
Raw Input Span Adjustment
Proceed as for
Raw Input Offset Adjustment
correct input for the spot calibration required. Engineering
units are displayed.
Set the value required. The decimal point position is set
automatically.
For the Example above inject a signal equivalent to 15.0
and set the display to 15.0.
Continued on next page.
to reset the process variable offset
and apply the
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