Teledyne 2020 - Explosion proof thermal conductivity analyzer - Manual (Page 61)

Thermal Conductivity Analyzer Operation 4
4-27 Teledyne Analytical Instruments
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
required.
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 the Zero and the Span concentration. Do
not enter the 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 Appendix for ordering information. To enter data:
From the MAIN MENU Screen—
1. Use UP/DOWN to select
ALGORITHM , and
Enter .
2. Select and Enter
SETUP.
3.
Select 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 UP/DOWN key to set the INPUT value for the lowest concen-
tration into the first point. ENTER to move to OUTPUT field. Use the
UP/DOWN key to set the OUTPUT value, the lowest concentration into
the first point. ENTER to accept the first setting.
After each point is entered, the data-point number increments to the
next point. Moving from the lowest to the highest concentration, use the
UP/DOWN keys to set the proper values at each point.