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4 Operation
If the OUTPUT value shown is not correct, the linearization must be correct-
ed. Press ESCAPE to return to the previous screen. Select and Enter SET UP
to Calibration Mode screen.
There are two ways to linearize: AUTO and MANUAL: The auto mode
requires as many calibration gases as there will be correction points along the
curve. The user decides on the number of points, based on the precision re-
quired.
The manual mode only requires entering the values for each correction
point into the microprocessor via the front panel buttons. Again, the number of
points required is determined by the user.
Note: Before performing section 4.8.2 or 4.8.2.3, you must check to
ensure that your calibration gases or points are between low
end and high end of the range setup. All correction points
must be between Zero and Span concentrations. Do not enter
Zero and Span points as part of the correction.
4.8.2.2 Manual Mode Linearization
To linearize manually, you must have previous knowledge of the nonlinear
thermal-conductivity characteristics of your gases. You enter the value of the
differential between the actual concentration and the apparent concentration
(analyzer output). Analytical Instruments has tabular data of this type for a large
number of gases, which it makes available to customers on request. See Appen-
dix for ordering information. To enter data:
From the System Functions Screen—
1. Use < > to select ALGORITHM , and Enter.
2. Select and Enter SETUP.
3. Enter MANUAL from the Calibration Mode Select screen.
The data entry screen resembles the verify screen, but the gas values can
be modified and the data-point number cannot. Use the
between the INPUT and OUTPUT fields. Use the Δ∇ keys to set the value for
the lowest concentration into the first point. Then press Enter.
4-26 Part I
Select
algorithm
mode : AUTO
Dpt INPUT
OUTPUT
Ø Ø.ØØ
Ø.ØØ
Teledyne Analytical Instruments
Model 2010A
< >
keys to toggle
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