User guide

Thermal Conductivity Analyzer Part I: Control Unit

Part I 4-15

Teledyne Analytical Instruments

4.4.2.1 Auto Mode Spanning

Observe all precautions in sections 4.4 and 4.4.2, above. Press Span to

enter the span function. The screen that appears allows you to select whether the

span calibration is to be performed automatically or manually. Use the

ΔΔ

Δ∇

arrow keys to toggle between AUTO and MAN span settling. Stop when

AUTO appears, blinking, on the display.

Select span

mode: AUTO

Press Enter to move to the next screen.

Span Val: 2Ø.ØØ %

<ENT> To begin span

Use the < > arrow keys to toggle between the span concentration value

and the units field (%/ppm). Use the

ΔΔ

Δ∇ arrow keys change the value and/or the

units, as necessary. When you have set the concentration of the span gas you are

using, press Enter to begin the Span calibration.

####.##% H2 — N2

Slope=#.### Span

The beginning span value is shown in the upper left corner of the display.

As the span reading settles, the screen displays and updates information on

Slope. Spanning automatically ends when the span output corresponds, within

tolerance, to the value of the span gas concentration. Then the instrument auto-

matically returns to the analyze mode.

4.4.2.2 Manual Mode Spanning

Press Span to start the Span function. The screen that appears allows

you to select whether the span calibration is to be performed automatically or

manually.

Select span

mode: MANUAL

Use the Δ∇ keys to toggle between AUTO and MAN span settling. Stop

when MAN appears, blinking, on the display. Press Enter to move to the next

screen.

Span Val: 2Ø.ØØ %

<ENT> To begin span

Use the < > arrow keys to toggle between the span concentration value

and the units field (%/ppm). Use the

ΔΔ

Δ∇ arrow keys change the value and/or the