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Teledyne 3000PA - General purpose percent oxygen analyzer User Manual

Page 43

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Percent Oxygen Analyzer

Operation 4

4-11

Teledyne Analytical Instruments

Although the B-1 cell is standard in the 3000PA, check Specific Model

Information in the Front Matter in this manual for the class of cell you
purchased
. Then check Cell Replacement in chapter 5 Maintenance, and do
the prescribed calculations.

If a weak cell is indicated, replace the cell as described there in chapter

5.

4.4.2 Span Cal

The

Span

button on the front panel is used to span calibrate the ana-

lyzer. Span calibration can be performed using the automatic mode, where
an internal algorithm compares consecutive readings from the sensor to
determine when the output matches the span gas concentration. Span cali-
bration can also be performed manual mode, where the operator determines
when the span concentration reading is acceptable and then manually exits
the function.

4.4.2.1

Auto Mode Spanning

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

∆∆∆∆∆∇

arrow keys to toggle between

AUTO

and

MAN

span

settling. Stop when

AUTO

appears, blinking, on the display.

Span: Settling: AUTO
For Next

Press

Enter

to move to the next screen.

Span Val: 20.90
Span Mod #

Use the

∆∆∆∆∆∇

arrow keys to enter the oxygen-concentration mode. Use

the < > arrow keys to blink the digit you are going to modify. Use the

∆∆∆∆∆∇

arrow keys again to change the value of the selected digit. When you have
finished typing in the concentration of the span gas you are using (20.90 if
you are using air), press

Enter

to begin the Span calibration.

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

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

display. As the span reading settles, the screen displays and updates informa-
tion on

Slope

. Spanning automatically ends when the slope is less than 1/50