Lakeshore 335 - 5.10 SoftCal

5.9.2 Erase Cur ve 81
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5.9.2 Erase Curve
User curves that are no longer needed may be erased. Erase Curve sets all identifica-
tion parameters to default and blanks all breakpoint values. To perform the Erase
Curve operation, follow this procedure:
1. Press Curve Entry, scroll to Erase Curve, and press Enter.
2. Scroll to the desired curve and press Enter.
3. Choose Yes at the confirmation message to finalize the operation.
4. To cancel the operation, either choose No to the confirmation message, or press
Escape.
Menu Navigation:
Curve EntryQErase Curve (21–59)Q Delete Curve #? (Yes, No)
Interface Command: CRDEL
5.9.3 Copy Curve
Temperature curves can be copied from one location inside the Model 335 to another.
This is a good way to make small changes to an existing curve. Curve copy may also be
necessary if the user needs the same curve with two different temperature limits or
needs to extend the range of a standard curve. The curve that is copied from is always
preserved.
The copy routine allows you to overwrite an existing user curve. Please ensure the curve
number you are writing to is correct before proceeding with the copy curve operation.
To perform the Copy Curve operation, follow this procedure:
1. Press Curve Entry, scroll to Copy Curve, and press Enter.
2. Scroll to the desired curve to copy and press Enter. Scroll to the desired user
curve location to copy to, and press Enter.
3. Choose Yes at the confirmation message to finalize the operation.
4. To cancel the operation, either choose No to the confirmation message, or press
Escape.
Menu Navigation:
Curve Entry QCopy Curve Q Copy Curve from (1 to 59) QCopy Curve to (21 to 59)
Interface Command: (No interface command directly corresponds to the copy curve
operation. The CRVHDR and CRVPT commands can be used to read curve information
from one curve location and write that information to another curve location.)
5.10 SoftCal™
The Model 335 allows you to perform inexpensive sensor calibrations with a set of
algorithms called SoftCal™. The two SoftCal™ algorithms in the Model 335 work with
DT-400 Series silicon diode sensors and platinum sensors. They create a new temper
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ature response curve from the standard curve and known data points entered by the
user. The new curve loads into one of the user curve locations (21 to 59) in the instru
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ment. The following sections describe the data points needed from the user and the
expected accuracy of the resulting curves.
A feature similar to SoftCal™ is available for compensating thermocouples using the
Curve Handler program.
Both DT-400 Series and platinum SoftCal™ algorithms require a standard curve that
is already present in the Model 335. When you enter the type of sensor being cali
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brated, select the correct standard curve. When calibration is complete, assign the
new curve to an input. The Model 335 does not automatically assign the newly gener
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ated curve to either input.