Teledyne 2020 - Explosion proof thermal conductivity analyzer - Manual (Page 54)

4 Operation Model 2020
4-20 Teledyne Analytical Instruments
In the
AUTO screen, you are further allowed to select which gas appli-
cation (PREVIOUSLY defined in APPLICATION 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.
Use UP/DOWN key to start the RANGE function, and ENTER
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 UP/DOWN arrow keys to Select
MANUAL, and press
Enter.
Select range to run
—> Ш1 Ш2 Ш3 CAL<—
Use the UP/DOWN keys to select the range: 01, 02, 03, or CAL.
Then press Enter .
Gas use: H2 — N2
Range: Ø — 10 %
Use the ENTER key to move the range to low-end field. Use ENTER
key to move the range to high-end field. Use the UP/DOWN 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 automatically 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 sensitivi-
ty. If the upper limit of the operating range is reached, the instrument