Teledyne 2000A-EU Operating Instructions Manual page 85

Thermal Conductivity Analyzer
Now the analyzer will do the final step which is the Software zero adjustment.
No input is required and the analyzer will return automatically to the Analyze
mode when done.
6 When the analyzer finishes zero, feed span gas and purge for the time needed
to get readings that are leveled. Feed 90% H2 in air to the analyzer.
7 Press the SPAN button, press the arrow > hold until OK appears on the upper
right corner of the VFD display.
8 You have the option to select AUTO or MANual. AUTO lets the analyzer
adjust itself and may take longer while in MANual mode the operator has only
to press Enter when he thinks the reading is stable enough. Set the Span value
to 80.00%.
9 The analyzer should end the span by itself if AUTO was selected or when you
press the Enter switch if MANual was selected.
10 This range is now calibrated.
CALIBRATE CAL RANGE
1 Select the RANGE function on the main menu and place the analyzer in the Cal
Range.
2 Feed zero gas to analyzer and purge for the time needed to get readings that are
leveled. Feed H2 to the analyzer
3 Now select the ZERO function from the main menu and press Enter.
If you want to calibrate only the Cal Range:
select MANual.
If you want to calibrate all ranges:
select AUTO.
4 If you choose manual, you first will do the Coarse zero adjustment using the Up
and Down arrows. Adjust until display reads as close to zero as you can then
press Enter. Now do the Fine zero adjustment using the Up and Down button
until the display reads as close to zero as possible then press Enter. Now the
analyzer will do the final step which is the Software zero adjustment.
Teledyne Analytical Instruments
Appendix
A-7