Teledyne 3000PA operating instructions Span Cal, Auto Mode Spanning

Percent Oxygen Analyzer Operation 4

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.

4.4.2.1Auto 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

<ENT> For Next

Press Enter to move to the next screen.

Span Val: 20.90 <ENT>Span <UP>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

Teledyne Analytical Instruments 4-11