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Teledyne 3010PAC - Split architecture percent oxygen analyzer (EU - CENELEC) User Manual

Page 46

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4 Operation

Model 3010

PAC

4-12: Part I

Teledyne Analytical Instruments

tion on Slope. Spanning automatically ends when the span output corre-
sponds, within tolerance, to the value of the span gas concentration. Then the
instrument automatically 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.

Span: Settling:MAN
For Next

Use the

∆∇ 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: 20.90
Span Mod #

Press

∆ () to permit modification (Mod #) of span value.

Use the arrow keys to enter the oxygen concentration of the span gas

you are using (20.90 if you are using air). The < > arrows choose the digit,
and the

∆∇ arrows choose the value of the digit.

Press

Enter

to enter the span value into the system and begin the span

calibration.

Once the span has begun, the microprocessor samples the output at a

predetermined rate. It calculates the difference between successive samplings
and displays this difference as Slope on the screen. It takes several seconds
for the first Slope value to display. Slope indicates rate of change of the Span
reading. It is a sensitive indicator of stability.

#### % Span
Slope=#### ppm/s

When the

Span value displayed on the screen is sufficiently stable,

press

Enter

. (Generally, when the

Span reading changes by 1 % or less of

the full scale of the range being calibrated for a period of ten minutes it is
sufficiently stable.) Once

Enter

is pressed, the

Span reading changes to the

correct value. The instrument then automatically enters the

Analyze

func-

tion.