CAL files are created if a program using FieldCal() or FieldCalStrain() does not
find an existing, compatible CAL file. Files are updated with each successful
calibration with new calibration factors factors. A calibration history is recorded
only if the CRBasic program creates a data table
(p. 512) with the
SampleFieldCal() instruction.
Note CAL files created by FieldCal() and FieldCalStrain() differ from files
created by the CalFile() instruction (File Management (p. 382)).
7.9.12.2 Field Calibration Programming
Field-calibration functionality is included in a CRBasic program through either of
the following instructions:
• FieldCal() — the principal instruction used for non-strain gage type sensors.
For introductory purposes, use one FieldCal() instruction and a unique set of
FieldCal() variables for each sensor. For more advanced applications, use
variable arrays.
• FieldCalStrain() — the principal instruction used for strain gages measuring
microstrain. Use one FieldCalStrain() instruction and a unique set of
FieldCalStrain() variables for each sensor. For more advanced applications,
use variable arrays.
FieldCal() and FieldCalStrain() use the following instructions:
• LoadFieldCal() — an optional instruction that evaluates the validity of, and
loads values from a CAL file.
• SampleFieldCal — an optional data-storage output instruction that writes the
latest calibration values to a data table (not to the CAL file).
FieldCal() and FieldCalStrain() use the following reserved Boolean variable:
• NewFieldCal — a reserved Boolean variable under CR1000 control used to
optionally trigger a data storage output table one time after a calibration has
succeeded.
See CRBasic Editor Help for operational details on CRBasic instructions.
7.9.12.3 Field Calibration Wizard Overview
The LoggerNet and RTDAQ field calibration wizards step you through the
procedure by performing the mode-variable changes and measurements
automatically. You set the sensor to known values and input those values into the
wizard.
When a program with FieldCal() or FieldCalStrain() is running, select
LoggerNet or RTDAQ | Datalogger | Calibration Wizard to start the wizard. A
list of measurements used is shown.
For more information on using the calibration wizard, consult LoggerNet or
RTDAQ Help.
7.9.12.4 Field Calibration Numeric Monitor Procedures
Manual field calibration through the numeric monitor (in lieu of a CR1000KD
Keyboard / Display is presented here to introduce the use and function of the
FieldCal() and FieldCalStrain() instructions. This section is not a
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