Teledyne 2010A - Split architecture thermal conductivity analyzer - Manual (Page 53)

Thermal Conductivity Analyzer Part I: Control Unit
Part I 4-19 Teledyne Analytical Instruments
In the AUTO screen, you are further allowed to select which gas application
(PREVIOUSLY defined in System function) to run.
4.6.1 Manual (Select/Define Range) Screen
The Manual range-switching mode allows you to select a single, fixed
analysis range. It then allows you to redefine the upper and lower limits, for the
range.
Press Range key to start the Range function.
Select range
mode: MANUAL
Note: If all three ranges are currently defined for different applica-
tion gases, then the above screen does not display (because
mode must be manual). Instead, the VFD goes directly to the
following screen.
If above screen displays, use the
Δ∇ arrow keys to Select MANUAL, and
press Enter.
Select range to run
—> Ш1 Ш2 Ш3 CAL<—
Use the < > keys to select the range: 01, 02, 03, or CAL. Then press
Enter .
Gas use: H2 — N2
Range: Ø — 10 %
Use the < > keys to toggle between the Range: low-end field and the
Range: high-end field. Use the
ΔΔΔΔΔ∇ keys to change the values of the fields.
Press Escape to return to the previous screen to select or define another
range.
Press Enter to return the to the Analyze function.
4.6.2 Auto (Single Application) Screen
Autoranging will automaticaly set to the application that has at least two
range setup with the same gases.
In the autoranging mode, the microprocessor automatically responds to
concentration changes by switching ranges for optimum readout sensitivity. If the
upper limit of the operating range is reached, the instrument automatically shifts
to the next higher range. If the concentration falls to below 85% of full scale of