Teledyne Trace Oxygen Analyzer Operation Model 3000TA-XL-EU Span Cal, Auto Mode Spanning

4 Operation Model 3000TA-XL-EU

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 in manual mode, where the operator deter- mines when the span concentration reading is acceptable and 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 Δ∇ 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.

Calib.Holdingtime

Cal hold: 5 min

This menue allows the operator to set the time the analyzer should be held in the AUTO span mode, after the readings of the analyzer settle. Five minutes is the default, but it could be adjusted anywhere from 1 to 60 min- utes by using the UP or DOWN keys.

Press Enter to move to the next screen.

Span Val: 000008.00 <ENT>Span <UP>Mod #

Use the Δ∇ arrow keys to enter the oxygen-concentration mode. Use the < > arrow keys to blink the digit you are going to modify. Use the Δ∇ 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, press Enter to begin the Span calibration.

####ppm 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 span output corre-

4-14 Teledyne Analytical Instruments