HEIDENHAIN ND 2100G - Manual (Page 114)

114 2 Installation and Specifications
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p Specifying Min and Max calibration warnings
Periodic calibrations of input devices are sometimes performed on a
regular schedule using the same calibration artifacts for each
calibration. The Min and Max calibration warnings support these
activities by validating each calibration. Warnings apply only to user-
specified linear channels, not to angular or time oriented channels.
Specify the channel by decrementing or incrementing to the desired
channel number.
Calibrations are validated by comparing each new set of calibration
values to the original calibration values. Significant differences
between the new and original values indicate artifact errors,
equipment malfunctions or measurement errors. The acceptable
difference between the new and original calibration values is specified
by entering the acceptable difference into the Min Warning and Max
Warning fields.
During calibration, if new calibration values fall outside the acceptable
range, the calibration is invalidated and a warning is displayed. When
a new calibration is invalidated, the user can correct the problem and
attempt another new calibration, accept the value as a preset or
conduct measurements using the original (unchanged) calibration
values.
To specify the acceptable range of new calibration values:
When Mean calibrations are performed, only the Min Warning value is
required.
U Highlight the Min Warning field
U Enter the acceptable deviation from the original minimum master
calibration value
When Min-Max calibrations are performed, Min and Max Warning
values are required.
U Highlight the Max Warning field
U Enter the acceptable deviation from the original maximum master
calibration value
U Press the ENTER key
The Min/Max warnings will be applied to the next set of
calibration values obtained using the Master function
described in Chapter 1: Operation.