Teledyne 2000A-EU - General purpose thermal conductivity analyzer - Manual (Page 65)

Thermal Conductivity Analyzer Operation 4
4-27 Teledyne Analytical Instruments
Repeat the above procedure for each of the data points you are setting (up
to nine points: 0-8). Set the points in unit increments. Do not skip numbers. The
linearizer will automatically adjust for the number of points entered.
When you are done, Press ESCAPE . The message,
Completed. Wait
for calculation, appears briefly, and then the main
System screen returns.
To end the session:
If started with the RS-232, send:
st
st
to the analyzer from the computer.
If started through the front panel, turn the instrument off and back on.
Press the Enter key twice to return to the Analyze mode.
4.8.2.3 Auto Mode Linearization
To linearize in the Auto Mode, you must have on hand a separate calibra-
tion gas for each of the data points you are going use in your linearization. First,
the analyzer is zeroed and spanned as usual. Then, each special span gas, for
each of the intermediate calibration points, is flowed, in turn, through the sensor.
As each gas flows, the differential value for that intermediate calibration point is
entered from the front panel of the analyzer.
Before starting linearization, perform a standard calibration. See section
4.4. 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 Auto Linearize Mode data entry screen appears.
1.3 % O2 — Air
Input(Ø) :5.94
5. Use the
∆∇
keys to set the proper value, and Enter . Repeat this
step for each cal-point number as it appears in the
Input (x)
parentheses.
6. Repeat step 5 for each of the special calibration gases, from the
lowest to the highest concentrations. Press Escape when done.
To end the session:
If started with the RS-232, send: