Teledyne 2010B - Split architecture thermal conductivity analyzer - Manual (Page 60)

4 Operation Model 2010B
4-26 Part I Teledyne Analytical Instruments
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.
Select algorithm
mode : AUTO
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.
Dpt INPUT OUTPUT
Ш Ш.ШШ Ш.ШШ
The data entry screen resembles the verify screen, but the gas values can
be modified and the data-point number cannot. Use the < > keys to toggle
between the
INPUT and OUTPUT fields. Use the ∆∇
keys to set the value for
the lowest concentration into the first point. Then press Enter .